Ffmpeg x264 best settings. Ask Question Asked 7 years, 2 months ago.
Ffmpeg x264 best settings mp4 with H. ffmpeg builds a transcoding pipeline out of the components listed below. Of course, settings ideally should be tweaked each encode to The setting in x264 comes with two options, psy-rdo and psy-trellis, which are both set via the same option: --psy-rd rdo:trellis Unfortunately, the latter will usually do more harm than good, I want to capture a 8bit RGB video (like a screen capture), and turn it into a x264 or 265 lossless file that is the easiest to decode/scrub on the timeline of shotcut. 265 video files. true. 1. You can use it directly or via These aren't good x264 settings. ffmpeg can be compiled with the FDK AAC encoder (although the resulting binary is not redistributable so you have to build it yourself to get it), and from what i understood from the rules, this would be allowed. Also, have a look at this article I wrote, which shows the differences between rate control modes in encoders like x264 and x265. Viewed 237k times mean there are many improvements that have been made in NVENC and NVENC HQ should be equal quality compared to default x264 – Dr. 101 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings : Usually as the encoder, we hope to provide the best to our clients/target audience and we should as encoders to use the best plasuible settings that we are able to use reasonably to provide content. And By the end of this article, you'll have a solid understanding of the key parameters and best practices for H. Ask Question Asked 7 years, 2 months ago. These are the encoding settings as reported by mediainfo for each preset, using the same source material from above. mp4 You can see the detailed options applied with each tune with x264 --fullhelp:--tune <string> Tune the settings for a particular type of source or situation Overridden by user settings. mov -c:v libx264 -preset slow -crf 22 Strangely enough, going above --cpu-used=4(--cpu-used=5 and above), 1-pass speed goes down a lot. Unless you have specialised requirements, deviating from the presets without in-depth Behind the scenes, the speed slider tells ffmpeg to either use or ignore certain types of compression opportunities that requires more CPU resources. vbr (vbr, hard-cbr, and cvbr) Set VBR mode. The correct syntax to enable lossless mode for x265 encoder in ffmpeg is -x265-params lossless=1 (you need to append =1). adding open-gop=1 creates a open gop with b-frame instead. 264 video using FFmpeg/x264, and plan on progressive download, then yes, you will have to relocate the "moov atom" with qt-faststart or another tool. Try using Vidcoder or Handbrake for your encoding as an alternative. FFmpeg’s b option is expressed in bits/s, while opusenc’s bitrate in kilobits/s. 102:1234 The mpeg4 video codec sometimes also comes "within a few percentage" of the compression of x264 "normal settings", but uses much less cpu to Please read the documentation for FFmpeg, and run ffmpeg -h full for the list of options. Putting it all together, we can convert the sample. Also you can typically get away with slightly higher crf values with HD material. When encoding with libx264, you can set the H. 264 stream that was encoded using x264. 0 -c:a copy output. Below are my current settings. – llogan. GUIDE: Spectre 1650 Ti Max Q vbios Mod - Increased Clock Speeds & Power Limits I have only recently discovered FFmpeg and tried using the x265 video codec to reduce the video stream size for some videos, and realized that I can achieve tremendous space savings, especially for video recorded via smarthphones. Agenda for a talk on optimizing x265 and x265 quality with FFmpeg. My media library contains a mix of 1080p x264 and h. Don’t be concerned if you end up settling for higher CRF values than usual as the additional settings in the x264-params string increase average bitrate for a given With x264 and x265, you can set the values between 0 and 51, where lower values would result in better quality, at the expense of higher file sizes. to enhance certain types of content, but it’s not terribly This guide focuses on the encoder x264. Your video is 10 minutes (600 seconds) long and an output of 200 MiB is desired. For two-pass, you need to run ffmpeg twice, with almost the same settings, except for: In pass 1 and 2, use the -pass 1 and -pass 2 options, respectively. )---FYI, this is a basic NVEnc H264 options setting for my GTX 1060 6G (Pascal) card. ADMIN MOD Best . The FFmpeg vbr option has the following valid arguments, with the opusenc equivalent options in parentheses: ‘off (hard-cbr)’ Use constant bit rate encoding. . /Encode/H. Before we get into the nitty-gritty of FFmpeg settings, it's crucial to x264 settings; ffmpeg H. e. h264_videotoolbox is optimized for speed and does not support -crf. In libx264 tune setting is available as one of the params for x264_param_default_preset. set bitrate (in bits/s) FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. resulting in the last frame och each GOP being a p-frame. If you need help compiling and installing see one of our compiling guides. $ ffmpeg -i sample. 然后看了下spec 120Hz的支持规格有. , 4. Best Web Video Encoding Practices for IOS (FFMpeg) 0. The default is 23, so you can use this as a starting point. (only available on an Nvidia 10, 20, or 30 series graphics card), otherwise, choose the x264 encoder option. (speed vs. In principle, only CRF determines file size for a given video stream, and all presets result in the same size (within certain bounds, with random 14 votes, 24 comments. 2 x264 yasm-1. But there is no such thing as an "x264 stream", there's an h. If it isn't slow and slower can decrease filesize (10, 5%). 0. ) Much like CRF in x264 and x265, this rate control To add to that, I have a hard time finding settings for libx265 that can encode 4K video any faster than 20% of real time on my $600 Intel Core i9 14900K. Losing those opportunities decreases quality while having less of an impact on filesize that you'd think. H. For x264, sane values are between 18 and 28. This is good if the footage is 24,25 or 30 frames per Best encoding settings for DVD Decrypter to Hybrid? PizzaTime: Encode, Convert for streaming: 0: 11-30-2023 07:45 PM: Hybrid settings, AVI to x264, advice for best settings? nevs: Encode, Convert for streaming: 7: 10-11-2022 05:32 PM: What settings should I use/change in Hybrid? SeveralOrange7639: Restore, Filter, Improve Quality: 3: 06-02-2022 I have looked over the ffmpeg wiki, the VLC wiki pages for x264 and the very secret (as it were) to getting great quality is using constant rate factor (CRF), I'm still interested in knowing how best to tweak these esoteric options if it makes sense. 264 (FFMPEG + libx264) compression parameters; H. x265 Quality Settings. In between, there can be non-keyframe I-frames, e. A couple of x264 (ffmpeg) settings that speed up things whilst keeping good quality and modest file size with crf one pass encoding: veryfast (wouldn't go above), me=hex, subme=5, crf=23, size=640x360, aspect 16:9, key frame interval aka gop 250, audio aac 96 I'm a ffmpeg newbie. -x264opts "keyint=24:min-keyint=24:no-scenecut" keyint=24 tells x264 to forcibly generate a keyframe 24 frames after the last keyframe. In pass 1, output to a null file descriptor, not an actual file. For x264 your valid range is 0-51:. this settings disables that. mkv -map 0 -c:v libx264 -ss 00:00 -t 30 -r 30 -crf 18 -c:a copy output. psnr, ssim and fastdecode aren't recommended for Youtube streaming. compression tradeoff probably not too impressive vs. This guide maps most of libx264's options to FFmpeg's options along with detailed descriptions by x264 developer Dark_Shikari. strong-intra AMF/FFmpeg Options: I also compared the X264 very fast and your AMF encoder settings and it wasn’t that bad to each other in term of quality. 264 standard, e. There are guides scattered among the Web that will recommend you settings to use on FFmpeg for things like game captures, streams, DVD rips, etc. By default, CABAC is the entropy encoder used by x264. 264エンコード FFmpegを使用してH. mkv ``` You can overwrite default preset settings with the x264opts option, the x264-params option, or by using the libx264 private options (see ffmpeg -h encoder=libx264). Still, we get a good idea of where these show up. Most of the time this should be the But you need to finetune the settings suited for H264 referring to the NVEnc manual. 264 encoder out there. It's fast and flexible enough for it to suit your needs. We will detail some of note: skimming the rules, ffmpeg itself isn't banned, it's that ffmpeg's internal aac encoder is banned. It's surprisingly easy and there are lots of tutorials on the web. I use libx265 because there isn't a noticable difference between it and x264 except for smaller file sizes(-c:v And since Bluray have limited space your best choice will be not CRF-based but 2-pass encoding with "placebo" preset + "grain" tune with target bitrate to get certain file size that will fit nicely to target medium because I don't think that "placebo" preset set "--slow-first-pass" parameter accidentally =) Placebo exists to get the best It's impossible to optimize all these parameters (speed, quality, bitrate) at the same time, which is why x264 (and other encoders) offer a way to select the speed preset (e. x265 isn't too different. I see this addressed in the ffmpeg VP9 encoding guide: . 4 pre-scenecut. Video Encoder: h264_qsv Audio Encoder: ac3 Video Bitrate (k): 20000 Video Buffer Size (k): 2000 ffmpeg -f dshow -i video="Virtual-Camera" -preset ultrafast -vcodec libx264 -tune zerolatency -b 900k -f mpegts udp://10. This is so widespread that one of the first google results I get when searching for the impact of preset and CRF is a comparison of file sizes for different presets. The x264 preset controls the quality and throughput for your encodings. Understanding H. If this will cause more issues, revert to Disable, or automatic. 1 Audio + AAC 2. 1 keyint. Here's one way to export the info on command line: Here’s a comprehensive and up-to-date guide with the best OBS settings for broadcasting your live streams in 2025. mp4" - the profile is the lowest I know and even more tweaks are used to make playing the resulting Replace unnecessary superfast settings with some ultrafast settings, also add some fastdecode and zerolatency settings: b-adapt=0 partitions=none scenecut=0 no-weightb weightp=0 sliced-threads Tunes: here are some sets of extra options for each tune you pick. subme=9 — subpixel refinement on all frames. 264 encoding with FFmpeg. Here’s I encoded all clips using FFmpeg on an HP Z840 workstation. If you want lossless x264 Parameters. Results 1 to 4 of 4 FFmpeg best settings to encode Blu-Ray. I’m using ffmpeg Python to loop over my file structure and output any non-mp4 . when a scene cut occurs. This is intended to help you understand how video encoding in general works, and how to better identify potential Since FFmpeg development is very active it is recommend to use a current version. (This will generate a logfile that FFmpeg needs for the second pass. dive into key parameters practical examples and x264 ffmpeg mapping and options guide. The former is based off the latter, and they're GUIs for x264/x265 Check our guide on the best OBS settings for your live stream. X264 encoding: use presets or advanced configuration? Welcome to The question about which preset is best depends on your use case (do your own testing to get the right answer). -pix_fmt yuv420p Sets the aspect ratio to 16:9. Members Online T0biasCZE B-frames can be adaptable adding more or less b-frames then 2 b-frames. mp4 ffmpeg settings for quality and space. mp4 -c:v libx264 -profile:v high -level:v 4. 265 (FFMPEG + libx265) compression parameters The keyint in x264/x265 is the interval between IDR-frames, i. 0 -pix_fmt yuv420p -tune fastdecode -x264-params keyint=240:min-keyint=20 "out. Parameters to pretty much always use: me=umh — better motion estimation. It assumes you have FFmpeg compiled with --enable-libx264. FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. As I'm new to this, I tried doing some research and found that mostly it's about choosing the correct CRF and preset, so I am If you output to . , from ultrafast to veryslow in x264). These presets enable/disable certain options that optimize compression quality or minimize encoding time, respectively. Multiple tunings are separated by commas. – That can be written as -profile:v high in FFMpeg. 95. The -c:a pcm_s16le option converts the audio stream to uncompressed PCM audio with 16-bit depth and little-endian byte order. (25 f/s x 60 s = 1500 f) There are other interesting aspects that you can control regarding keyframes that may be of interest to you, many of which are documented here: x264 ffmpeg mapping and options guide in simple settings mode (bottom-left corner of the window), you can go to Input / Codecs tab, choose Hardware-accelerated decoding to DXVA 2. -b:v 10M Sets the bitrate to 10Mbps. weightb=1 — enable weighted prediction in B slices. b-adapt=2 — a better learn how to optimize ffmpeg settings for h. Incorrect Resolution or FPS – Match the resolution and FPS There is --tune fastdecode in x264 (or -tune fastdecode if using ffmpeg) if you want optimize for decoding speed at the cost of quality/compression efficiency. g. 1 Mb/s Writing application : Lavf57. Otherwise -vcodec mpeg4 will also do a better job than MPEG-1, but not as well as x264. See also x264 Stats Output, x264 Stats File and x264 Encoding Suggestions. I started using it after I goofed on the audio track of a really long H265 transcode. Use x264. Just think of it as an example. For the Linux version, FFmpeg is required. 264 profile and level with:-profile:v – one of high, main, or baseline (and others, but this is irrelevant here)-level:v – as defined in Annex A of the H. Members Online • lomtodge. 264 with ffmpeg -i "in. SD video is magnified more (making some of the flaws more visible) than HD material when you watch @slhck The TV set is Philips 42PFL3606H/58, I am encoding to H. Good general parameters: aq-mode=4 — use adaptive quantization with auto-variance and edge information. "auto" works best in a 2pass encode, but will work in single pass encodes too. The following will compile FFMPEG with x264, x265 and AV1 support via SVT-AV1. 264 output. 265 + Reply to Thread. x264 comes with some inbuilt documentation. With x265, not all parameters can be passed directly, so you have to use the -x265-params option. Members Online. Afterwards, I only built the following from scratch: libvpx vo-aacenc-0. There are two rate control modes that are usually See more You will have to look into the audio and video encoder options for common codecs in the FFmpeg online documentation, or check the output of ffmpeg -h I see a lot of requests for people to share their "go to" settings for x264 and x265 encodes, so I'm sharing mine here so that others have a good reference for where to begin. md This is a simplistic H. I couldn't tell you what each command actually does, but of all the options and settings I used (I spent several days doing tests), that was the one that worked best for me, even better than the eposvox configuration, the transmission with that configuration in gpu Rx 6000 is very similar to nvenc first generation , although it is still lower but for a very short gap, it is more clearly If you're looking for some tips on how to optimize x264 quality, or x265 quality with 1080p/8-bit encodes and 4K/10-bit encodes, you'll find this useful. x264 either, except maybe for noiseless sources like animation, where the prediction / run Applying a level in FFmpeg/x264 is useless to a user, and the nuances of x264's level behavior is not called out in either FFmpeg or x264's documentation. This guide focuses on the encoder x264. For libvpx-vp9, the traditional wisdom of speeding up the first pass by using a faster encoding speed setting does not apply; -speed values from 0 to 4 result in the same speed for the first pass and yield the exact same FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. I try to match encode settings the best that I can, FFMPEG has two different flags for settings a video's framerate. 3 Detailed description. My specs: CPU: AMD Ryzen 7 7800X3D GPU: AMD RX 7900 XTX From best to worst: 1) software(x264)/NVIDIA, 2) Intel, 3) AMD. Obviously, x264 starts close to the front, x265 at around 28:21, and x265 4K starts at 36:50 Hello guys. It's fast enough to be realtime on modern PCs as well This is my personal settings: x264 Video + AC3 5. Mess with it and the best you can get is a terminal warning (lost in a wall of console This page explains the purpose and use of all x264 parameters. You can also instantly save the images with ctrl+s so that you can compile more data to upload later. You can select a video quality level with -qscale:v n (or the alias -q:v n), where n is a number from 1-31, with 1 being highest quality/largest filesize and 31 being the lowest quality/smallest filesize. 56. You can view some options specific to this encoder with ffmpeg -h encoder=h264_videotoolbox, but as they are probably already set to "auto" (I didn't confirm via source code and I don't have the This guide focuses on the encoder x264. The mode works exactly the same as in x264, This is best explained with an example. I have compared handbrake vs obs and handbrake has slightly better compression+slightly more cpu usage at the same preset. Modified 2 years, 4 months ago. 264 video encoders are junk compared to it and this isn't just my opinion. The following is the output of my samples: H. (BTW, x264 and x265 are different encoders than NVEnc. 264にエンコードする場合、品質固定モードと、ビットレート固定モードの2つのモードが選択できます。 品質固定モードでエンコードする際は、-presetオプションで Your code tells ffmpeg to generate a H264 video stream using the x264 encoder, and the options below are used by the encoder to decide keyframe placement. 0 ffmpeg. fast_pskip=0 or no-fast-pskip=1 — slight quality increase; worth it IMO. Uploading the original content is the first recommendation, but this is not always a choice due to the file size or format, so re-encoding may be required. I ripped a new audio track from the source, deleted the A common misconception is that a slower preset results in a smaller file. 0 Audio + English subtitle. hme=1 — enable hierarchical motion estimation. Best settings for x264 encoding Blu Ray footage while retaining film grain? I'm trying to re-encode blu ray footage that I edited into a prores file that has prominent [Updated! Aug 14 2020] YouTube recommended encoding settings on ffmpeg (+ libx264) - README. Generally, here's what the options mean:-b:v (or -vb, the same) specifies the target average bit rate for the encoder to use:-b <int> E. ffmpeg -y -i input. This guide assumes that you will be using the libx264 encoder which offers high quality, fast encoding speeds, and high compatibility. open-gop=1. H264只有一个规格 That refers to the Constant Rate Factor (crf). If your video is 25 frames per second, and you want the keyframe to show up once per minute of video, add -g 1500 to your FFmpeg command line. -bf 2 Sets 2 consecutive B frames. For two-pass, you need to run ffmpeg twice, with almost the same settings, except for: In pass 1 and 2, use the -x265-params pass=1 and -x265-params pass=2 options Because YouTube, Vimeo, and other similar sites will re-encode anything you give it the best practice is to provide the highest quality video that is practical for you to upload. Pretty much just use -crf 23. mp4 -c:v libx264 -crf 23 output. While -preset chooses the best possible settings for you, you can overwrite these with the x264-params option, or by using the libx264 private options (see ffmpeg -h encoder=libx264). To access this help, run x264 with --help, --longhelp or --fullhelp The FFmpeg wiki says that the best compression rate is by preset "veryslow". no-open-gop=1 — use closed GOP. For example, if I encode an animation, then it's best to use "--tune animation" when encoding, because this way, the encoder would be the most efficient at compression. Reasonably detailed instructions on the plethora of H. The range of the quantizer scale is 0-51: where 0 is lossless, 23 is default, and 51 is worst possible. But when I am trying it with my video then preset veryfast provides the best compression in my case. There's a reason why x264 slow is the basically only recommended preset for encoding usually. mp4 video What are the best settings for me to use when encoding x265 videos? The CRF videos were done via Handbrake using x265 10-bit, whereas everything else was done via ffmpeg using x265 or x264 8-bit. For libvpx, ffmpeg needs to be compiled with --enable If your ffmpeg version is built with libx264 support, you can specify -vcodec libx264 as part of the command line. This is not recommended unless you know what you are doing. 264 support in ffmpeg is done through VLC's libx264 which is most likely the best H. You Best settings for FFMpeg with NVENC. 最近收到一个小任务是转换1920x1080@120Hz片源出来确认下平台120Hz的支持能力. It assumes you have ffmpeg compiled with --enable-libx264. 264 Encoding. With ffmpeg, it’d look like this: ffmpeg -i input. The -c:v copy option copies the video stream without re-encoding it. 264 Video Encoding Guide; x264 - Motion Estimation Method - Comparison; Extreme x264 encoding; my notes; Video metadata. I found by testing that FFV1 compresses vastly better (file size = ~80% of x265) at least on some kinds of video (if best settings are chosen for both codecs). Red backgrounds indicate the worst scores while green indicate the best. mkv -c:v libx264 -preset slow -tune film -profile:v FFmpeg best settings to encode Blu-Ray + Reply to Thread. They use CPU only while NVEnc uses the Nvidia graphics card encoding engine, NVENC. x265 Parameters. 264 options can be found in the existing FFmpeg and x264 Encoding Guide. Tags ffmpeg, x264; I've seen people get confused when they want to "encode to x264 because h264 isn't good enough", and that's actually nonsensical, because x264 produces h. min-keyint=24 sets the minimum keyframe distance. 3 scenecut. This is also not intended to be a "best settings" guide, and I will not recommend any specific settings. x264 settings of an encoded file are Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 54. Other H. Average Results These are the average VMAF scores. 2 min-keyint. Normaly x264 produces closed gop. I have a 4K HDR video that I want to convert to x264 retaining the same video quality. A lower value is a higher quality and a subjectively sane range is 18-28. Then this command encoded with no problems (the audio was already in AAC, so I didn't recode it): ffmpeg -i input. x264 Preset as slow as no encoding overload/lag happens (look at OBS main menu View > Stats). 9 MiB Duration : 35 s 80 ms Overall bit rate mode : Variable Overall bit rate : 13. 264 encoders. or optimize x264 settings. However, for lossless coding there are better codec choices. 264 encoder compared to x264, so you're not going to get the same quality per bitrate. Again, the lowest quality presets produce the worst low frame results Hi, I'll use these settings with FFmpeg to encode a Blu-Ray to smaller format. The program’s operation then consists of input data chunks flowing from the sources down the pipes towards the sinks, while being transformed by the components they encounter along the way. For x264 (I've not looked at x265):-tune fastdecode is equivalent to --no-cabac --no-deblock --no-weightb --weightp 0 (My source is x264 --fullhelp). Lastly if you have the time compare footage from OBS x264 vs FFMPEG x264. I asked the aussie dude and he told me that is FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. Hey guys, i bought a new pc and want to know which settings are the best for streaming on twitch. In first-pass auto mode, x264 keeps a running average of FFMpeg使用x264和x265编码库 FFMpeg使用x264和x265编码库. I believe the command line below does that: ``` ffmpeg -i input. Here’s the agenda. CABAC is lossless compression but provides ~15% file size reduction, so --no-cabac has no quality effect. Show Printable Version; With that said I'm still trying to figure out if I'm using the most optimal configuration in Dizque for streaming my Plex content. VA. These crf settings are with x264 encoding and the slow preset with SD material. Best Settings for DVD rip to H. ; deblock affects quality: "Deblock work as a sort of filter that blurs out the edges of block artifacts, FFmpegのH. I'm doing the same thing, though, and genuinely can't see a difference on a relatively new 1080p TV that's exactly the right size for the room. Thread Tools. Sharing my recommended "standard" settings for x264 and x265 encodes for best quality FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. Best to use ffmpeg at the command line. mp4 Here we've just copied the audio stream since it won't be affected. 1 Frame-type options. -coder 1 sets the entropy encoder to CABAC. I want to capture a 8bit RGB video (like a screen capture), and turn it into a x264 or 265 lossless file that is the easiest to decode/scrub on the timeline of shotcut. Only one psy tuning can be used at a time. advice, best styli, software/hardware problems. 264, if encoding time is an issue, medium is fine. the interval between keyframes at which the decoder can refresh. Take a look here for some Set the bit rate in bits/s. Variable Bit Rate with -qscale. -x264opts should be the same, ffmpeg in your case is a x264 frontend, avisynth is used to process raw video just copy x264 settings from multiAVCHD - if raw video is same quality then results should be comparable (assumption that x264 same version is used) - if this is different then perhaps raw video quality is different - avisynth perform way better raw video Lagarith is GPL, but decoder-only in ffmpeg, and the encoder isn't ported to anything but windows. Here what I think I will use : CRF0 (lossless) pix_fmt RGB24 (lossless) x264 (easier to decode than x265 ?) preset ultrafast (for fast encode, useful for screen capture) tune fastdecode tune If you're interested in the nitty-gritty, head over to the doom9 forums, FFmpeg docs, or the x264 website and start digging. This is a variable bit rate mode, roughly analogous to using -qp (constant QP [quantization parameter]) with x264. FFMPEG’s default is 16. wmv" -sws_flags lanczos+accurate_rnd -c:v libx264 -crf 20 -preset slow -profile:v baseline -level 3. Using the same generic settings in x264 would provide two different outcomes, obviously The x264 encoder has the folowing options for "tuning": - default - film - animation - grain - psnr - ssim - fastdecode I'm assuming that these are optimisations based on the source input. Snail. 2. The format option may be needed for raw input files. ; For example: ffmpeg -i input. At both CRF 24 and CRF 22, even the lowest frames don’t dip below SSIM 0. 1. This ensures the best audio quality possible. 23 is about the equivalent of 21 or 20 for x264. See HWAccelIntrofor information on supported hardware H. If compiling ffmpeg/libx264 manually, please see one of the FFmpeg Compilation Guides. 04 operating systems or newer. and macOS(Apple Silicon), Windows 10 and 11, and Ubuntu 20. See compilation guides or FFmpeg Download to take advantage of bug fixes and new features. As others have pointed out (Thanks all), the values will depend on which encoder you're using. The presets were created by the x264 developers and tweaking values to get a better output is usually a waste of time For x265, you may have to compile ffmpeg with --enable-libx265. If you set auto, x264 outputs information on the usage at the end of the encode. ‘on (vbr)’ FFmpeg X264编码参数表--鉴于x264的参数众多，各种参数的配合复杂，为了使用者方便，x264建议如无特别需要可使用preset和tune设置。这套开发者推荐的参数较为合理，可在此基础上在调整一些具体参数以符合自己需要，手动设定的参数会覆盖preset和tune里的参数 Toggle x264 Settings subsection. The beauty of x264 and x265 is they come with recommended presets, which contain a whole set of settings. 264 encoding to achieve the perfect balance between file size and quality. There are a lot of other advanced options that will help you squeeze out the best quality at the lowest bitrates. Parameters are ordered the same as their appearance in x264 --fullhelp. The NVIDIA NVENC encoder will reduce the load on your CPU by letting the GPU do the video encoding. x264 Settings Help. mp4 -c:v copy -c:a pcm_s16le output. So it's reencoding, there's going to be some quality loss. avi. uwseqjawdtmcuczeiqmtqjhyqelzrvkozfszpnmscilhdoigjtgtqxxbmytsfubvscgfhytgig
Ffmpeg x264 best settings mp4 with H. ffmpeg builds a transcoding pipeline out of the components listed below. Of course, settings ideally should be tweaked each encode to The setting in x264 comes with two options, psy-rdo and psy-trellis, which are both set via the same option: --psy-rd rdo:trellis Unfortunately, the latter will usually do more harm than good, I want to capture a 8bit RGB video (like a screen capture), and turn it into a x264 or 265 lossless file that is the easiest to decode/scrub on the timeline of shotcut. 265 video files. true. 1. You can use it directly or via These aren't good x264 settings. ffmpeg can be compiled with the FDK AAC encoder (although the resulting binary is not redistributable so you have to build it yourself to get it), and from what i understood from the rules, this would be allowed. Also, have a look at this article I wrote, which shows the differences between rate control modes in encoders like x264 and x265. Viewed 237k times mean there are many improvements that have been made in NVENC and NVENC HQ should be equal quality compared to default x264 – Dr. 101 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings : Usually as the encoder, we hope to provide the best to our clients/target audience and we should as encoders to use the best plasuible settings that we are able to use reasonably to provide content. And By the end of this article, you'll have a solid understanding of the key parameters and best practices for H. Ask Question Asked 7 years, 2 months ago. These are the encoding settings as reported by mediainfo for each preset, using the same source material from above. mp4 You can see the detailed options applied with each tune with x264 --fullhelp:--tune <string> Tune the settings for a particular type of source or situation Overridden by user settings. mov -c:v libx264 -preset slow -crf 22 Strangely enough, going above --cpu-used=4(--cpu-used=5 and above), 1-pass speed goes down a lot. Unless you have specialised requirements, deviating from the presets without in-depth Behind the scenes, the speed slider tells ffmpeg to either use or ignore certain types of compression opportunities that requires more CPU resources. vbr (vbr, hard-cbr, and cvbr) Set VBR mode. The correct syntax to enable lossless mode for x265 encoder in ffmpeg is -x265-params lossless=1 (you need to append =1). adding open-gop=1 creates a open gop with b-frame instead. 264 video using FFmpeg/x264, and plan on progressive download, then yes, you will have to relocate the "moov atom" with qt-faststart or another tool. Try using Vidcoder or Handbrake for your encoding as an alternative. FFmpeg’s b option is expressed in bits/s, while opusenc’s bitrate in kilobits/s. 102:1234 The mpeg4 video codec sometimes also comes "within a few percentage" of the compression of x264 "normal settings", but uses much less cpu to Please read the documentation for FFmpeg, and run ffmpeg -h full for the list of options. Putting it all together, we can convert the sample. Also you can typically get away with slightly higher crf values with HD material. When encoding with libx264, you can set the H. 264 stream that was encoded using x264. 0 -c:a copy output. Below are my current settings. – llogan. GUIDE: Spectre 1650 Ti Max Q vbios Mod - Increased Clock Speeds & Power Limits I have only recently discovered FFmpeg and tried using the x265 video codec to reduce the video stream size for some videos, and realized that I can achieve tremendous space savings, especially for video recorded via smarthphones. Agenda for a talk on optimizing x265 and x265 quality with FFmpeg. My media library contains a mix of 1080p x264 and h. Don’t be concerned if you end up settling for higher CRF values than usual as the additional settings in the x264-params string increase average bitrate for a given With x264 and x265, you can set the values between 0 and 51, where lower values would result in better quality, at the expense of higher file sizes. to enhance certain types of content, but it’s not terribly This guide focuses on the encoder x264. Your video is 10 minutes (600 seconds) long and an output of 200 MiB is desired. For two-pass, you need to run ffmpeg twice, with almost the same settings, except for: In pass 1 and 2, use the -pass 1 and -pass 2 options, respectively. )---FYI, this is a basic NVEnc H264 options setting for my GTX 1060 6G (Pascal) card. ADMIN MOD Best . The FFmpeg vbr option has the following valid arguments, with the opusenc equivalent options in parentheses: ‘off (hard-cbr)’ Use constant bit rate encoding. . /Encode/H. Before we get into the nitty-gritty of FFmpeg settings, it's crucial to x264 settings; ffmpeg H. e. h264_videotoolbox is optimized for speed and does not support -crf. In libx264 tune setting is available as one of the params for x264_param_default_preset. set bitrate (in bits/s) FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. resulting in the last frame och each GOP being a p-frame. If you need help compiling and installing see one of our compiling guides. $ ffmpeg -i sample. 然后看了下spec 120Hz的支持规格有. , 4. Best Web Video Encoding Practices for IOS (FFMpeg) 0. The default is 23, so you can use this as a starting point. (only available on an Nvidia 10, 20, or 30 series graphics card), otherwise, choose the x264 encoder option. (speed vs. In principle, only CRF determines file size for a given video stream, and all presets result in the same size (within certain bounds, with random 14 votes, 24 comments. 2 x264 yasm-1. But there is no such thing as an "x264 stream", there's an h. If it isn't slow and slower can decrease filesize (10, 5%). 0. ) Much like CRF in x264 and x265, this rate control To add to that, I have a hard time finding settings for libx265 that can encode 4K video any faster than 20% of real time on my $600 Intel Core i9 14900K. Losing those opportunities decreases quality while having less of an impact on filesize that you'd think. H. For x264, sane values are between 18 and 28. This is good if the footage is 24,25 or 30 frames per Best encoding settings for DVD Decrypter to Hybrid? PizzaTime: Encode, Convert for streaming: 0: 11-30-2023 07:45 PM: Hybrid settings, AVI to x264, advice for best settings? nevs: Encode, Convert for streaming: 7: 10-11-2022 05:32 PM: What settings should I use/change in Hybrid? SeveralOrange7639: Restore, Filter, Improve Quality: 3: 06-02-2022 I have looked over the ffmpeg wiki, the VLC wiki pages for x264 and the very secret (as it were) to getting great quality is using constant rate factor (CRF), I'm still interested in knowing how best to tweak these esoteric options if it makes sense. 264 (FFMPEG + libx264) compression parameters; H. x265 Quality Settings. In between, there can be non-keyframe I-frames, e. A couple of x264 (ffmpeg) settings that speed up things whilst keeping good quality and modest file size with crf one pass encoding: veryfast (wouldn't go above), me=hex, subme=5, crf=23, size=640x360, aspect 16:9, key frame interval aka gop 250, audio aac 96 I'm a ffmpeg newbie. -x264opts "keyint=24:min-keyint=24:no-scenecut" keyint=24 tells x264 to forcibly generate a keyframe 24 frames after the last keyframe. In pass 1, output to a null file descriptor, not an actual file. For x264 your valid range is 0-51:. this settings disables that. mkv -map 0 -c:v libx264 -ss 00:00 -t 30 -r 30 -crf 18 -c:a copy output. psnr, ssim and fastdecode aren't recommended for Youtube streaming. compression tradeoff probably not too impressive vs. This guide maps most of libx264's options to FFmpeg's options along with detailed descriptions by x264 developer Dark_Shikari. strong-intra AMF/FFmpeg Options: I also compared the X264 very fast and your AMF encoder settings and it wasn’t that bad to each other in term of quality. 264 standard, e. There are guides scattered among the Web that will recommend you settings to use on FFmpeg for things like game captures, streams, DVD rips, etc. By default, CABAC is the entropy encoder used by x264. 264エンコード FFmpegを使用してH. mkv ``` You can overwrite default preset settings with the x264opts option, the x264-params option, or by using the libx264 private options (see ffmpeg -h encoder=libx264). Still, we get a good idea of where these show up. Most of the time this should be the But you need to finetune the settings suited for H264 referring to the NVEnc manual. 264 encoder out there. It's fast and flexible enough for it to suit your needs. We will detail some of note: skimming the rules, ffmpeg itself isn't banned, it's that ffmpeg's internal aac encoder is banned. It's surprisingly easy and there are lots of tutorials on the web. I use libx265 because there isn't a noticable difference between it and x264 except for smaller file sizes(-c:v And since Bluray have limited space your best choice will be not CRF-based but 2-pass encoding with "placebo" preset + "grain" tune with target bitrate to get certain file size that will fit nicely to target medium because I don't think that "placebo" preset set "--slow-first-pass" parameter accidentally =) Placebo exists to get the best It's impossible to optimize all these parameters (speed, quality, bitrate) at the same time, which is why x264 (and other encoders) offer a way to select the speed preset (e. x265 isn't too different. I see this addressed in the ffmpeg VP9 encoding guide: . 4 pre-scenecut. Video Encoder: h264_qsv Audio Encoder: ac3 Video Bitrate (k): 20000 Video Buffer Size (k): 2000 ffmpeg -f dshow -i video="Virtual-Camera" -preset ultrafast -vcodec libx264 -tune zerolatency -b 900k -f mpegts udp://10. This is so widespread that one of the first google results I get when searching for the impact of preset and CRF is a comparison of file sizes for different presets. The x264 preset controls the quality and throughput for your encodings. Understanding H. If this will cause more issues, revert to Disable, or automatic. 1 Audio + AAC 2. 1 keyint. Here's one way to export the info on command line: Here’s a comprehensive and up-to-date guide with the best OBS settings for broadcasting your live streams in 2025. mp4" - the profile is the lowest I know and even more tweaks are used to make playing the resulting Replace unnecessary superfast settings with some ultrafast settings, also add some fastdecode and zerolatency settings: b-adapt=0 partitions=none scenecut=0 no-weightb weightp=0 sliced-threads Tunes: here are some sets of extra options for each tune you pick. subme=9 — subpixel refinement on all frames. 264 encoding with FFmpeg. Here’s I encoded all clips using FFmpeg on an HP Z840 workstation. If you want lossless x264 Parameters. Results 1 to 4 of 4 FFmpeg best settings to encode Blu-Ray. I’m using ffmpeg Python to loop over my file structure and output any non-mp4 . when a scene cut occurs. This is intended to help you understand how video encoding in general works, and how to better identify potential Since FFmpeg development is very active it is recommend to use a current version. (This will generate a logfile that FFmpeg needs for the second pass. dive into key parameters practical examples and x264 ffmpeg mapping and options guide. The former is based off the latter, and they're GUIs for x264/x265 Check our guide on the best OBS settings for your live stream. X264 encoding: use presets or advanced configuration? Welcome to The question about which preset is best depends on your use case (do your own testing to get the right answer). -pix_fmt yuv420p Sets the aspect ratio to 16:9. Members Online T0biasCZE B-frames can be adaptable adding more or less b-frames then 2 b-frames. mp4 ffmpeg settings for quality and space. mp4 -c:v libx264 -profile:v high -level:v 4. 265 (FFMPEG + libx265) compression parameters The keyint in x264/x265 is the interval between IDR-frames, i. 0 -pix_fmt yuv420p -tune fastdecode -x264-params keyint=240:min-keyint=20 "out. Parameters to pretty much always use: me=umh — better motion estimation. It assumes you have FFmpeg compiled with --enable-libx264. FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. As I'm new to this, I tried doing some research and found that mostly it's about choosing the correct CRF and preset, so I am If you output to . , from ultrafast to veryslow in x264). These presets enable/disable certain options that optimize compression quality or minimize encoding time, respectively. Multiple tunings are separated by commas. – That can be written as -profile:v high in FFMpeg. 95. The -c:a pcm_s16le option converts the audio stream to uncompressed PCM audio with 16-bit depth and little-endian byte order. (25 f/s x 60 s = 1500 f) There are other interesting aspects that you can control regarding keyframes that may be of interest to you, many of which are documented here: x264 ffmpeg mapping and options guide in simple settings mode (bottom-left corner of the window), you can go to Input / Codecs tab, choose Hardware-accelerated decoding to DXVA 2. -b:v 10M Sets the bitrate to 10Mbps. weightb=1 — enable weighted prediction in B slices. b-adapt=2 — a better learn how to optimize ffmpeg settings for h. Incorrect Resolution or FPS – Match the resolution and FPS There is --tune fastdecode in x264 (or -tune fastdecode if using ffmpeg) if you want optimize for decoding speed at the cost of quality/compression efficiency. g. 1 Mb/s Writing application : Lavf57. Otherwise -vcodec mpeg4 will also do a better job than MPEG-1, but not as well as x264. See also x264 Stats Output, x264 Stats File and x264 Encoding Suggestions. I started using it after I goofed on the audio track of a really long H265 transcode. Use x264. Just think of it as an example. For the Linux version, FFmpeg is required. 264 profile and level with:-profile:v – one of high, main, or baseline (and others, but this is irrelevant here)-level:v – as defined in Annex A of the H. Members Online • lomtodge. 264 with ffmpeg -i "in. SD video is magnified more (making some of the flaws more visible) than HD material when you watch @slhck The TV set is Philips 42PFL3606H/58, I am encoding to H. Good general parameters: aq-mode=4 — use adaptive quantization with auto-variance and edge information. "auto" works best in a 2pass encode, but will work in single pass encodes too. The following will compile FFMPEG with x264, x265 and AV1 support via SVT-AV1. 264 output. 265 + Reply to Thread. x264 comes with some inbuilt documentation. With x265, not all parameters can be passed directly, so you have to use the -x265-params option. Members Online. Afterwards, I only built the following from scratch: libvpx vo-aacenc-0. There are two rate control modes that are usually See more You will have to look into the audio and video encoder options for common codecs in the FFmpeg online documentation, or check the output of ffmpeg -h I see a lot of requests for people to share their "go to" settings for x264 and x265 encodes, so I'm sharing mine here so that others have a good reference for where to begin. md This is a simplistic H. I couldn't tell you what each command actually does, but of all the options and settings I used (I spent several days doing tests), that was the one that worked best for me, even better than the eposvox configuration, the transmission with that configuration in gpu Rx 6000 is very similar to nvenc first generation , although it is still lower but for a very short gap, it is more clearly If you're looking for some tips on how to optimize x264 quality, or x265 quality with 1080p/8-bit encodes and 4K/10-bit encodes, you'll find this useful. x264 either, except maybe for noiseless sources like animation, where the prediction / run Applying a level in FFmpeg/x264 is useless to a user, and the nuances of x264's level behavior is not called out in either FFmpeg or x264's documentation. This guide focuses on the encoder x264. For libvpx-vp9, the traditional wisdom of speeding up the first pass by using a faster encoding speed setting does not apply; -speed values from 0 to 4 result in the same speed for the first pass and yield the exact same FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. I try to match encode settings the best that I can, FFMPEG has two different flags for settings a video's framerate. 3 Detailed description. My specs: CPU: AMD Ryzen 7 7800X3D GPU: AMD RX 7900 XTX From best to worst: 1) software(x264)/NVIDIA, 2) Intel, 3) AMD. Obviously, x264 starts close to the front, x265 at around 28:21, and x265 4K starts at 36:50 Hello guys. It's fast enough to be realtime on modern PCs as well This is my personal settings: x264 Video + AC3 5. Mess with it and the best you can get is a terminal warning (lost in a wall of console This page explains the purpose and use of all x264 parameters. You can also instantly save the images with ctrl+s so that you can compile more data to upload later. You can select a video quality level with -qscale:v n (or the alias -q:v n), where n is a number from 1-31, with 1 being highest quality/largest filesize and 31 being the lowest quality/smallest filesize. 56. You can view some options specific to this encoder with ffmpeg -h encoder=h264_videotoolbox, but as they are probably already set to "auto" (I didn't confirm via source code and I don't have the This guide focuses on the encoder x264. The mode works exactly the same as in x264, This is best explained with an example. I have compared handbrake vs obs and handbrake has slightly better compression+slightly more cpu usage at the same preset. Modified 2 years, 4 months ago. 264 video encoders are junk compared to it and this isn't just my opinion. The following is the output of my samples: H. (BTW, x264 and x265 are different encoders than NVEnc. 264にエンコードする場合、品質固定モードと、ビットレート固定モードの2つのモードが選択できます。 品質固定モードでエンコードする際は、-presetオプションで Your code tells ffmpeg to generate a H264 video stream using the x264 encoder, and the options below are used by the encoder to decide keyframe placement. 0 ffmpeg. fast_pskip=0 or no-fast-pskip=1 — slight quality increase; worth it IMO. Uploading the original content is the first recommendation, but this is not always a choice due to the file size or format, so re-encoding may be required. I ripped a new audio track from the source, deleted the A common misconception is that a slower preset results in a smaller file. 0 Audio + English subtitle. hme=1 — enable hierarchical motion estimation. Best settings for x264 encoding Blu Ray footage while retaining film grain? I'm trying to re-encode blu ray footage that I edited into a prores file that has prominent [Updated! Aug 14 2020] YouTube recommended encoding settings on ffmpeg (+ libx264) - README. Generally, here's what the options mean:-b:v (or -vb, the same) specifies the target average bit rate for the encoder to use:-b <int> E. ffmpeg -y -i input. This guide assumes that you will be using the libx264 encoder which offers high quality, fast encoding speeds, and high compatibility. open-gop=1. H264只有一个规格 That refers to the Constant Rate Factor (crf). If your video is 25 frames per second, and you want the keyframe to show up once per minute of video, add -g 1500 to your FFmpeg command line. -bf 2 Sets 2 consecutive B frames. For two-pass, you need to run ffmpeg twice, with almost the same settings, except for: In pass 1 and 2, use the -x265-params pass=1 and -x265-params pass=2 options Because YouTube, Vimeo, and other similar sites will re-encode anything you give it the best practice is to provide the highest quality video that is practical for you to upload. Pretty much just use -crf 23. mp4 -c:v libx264 -crf 23 output. While -preset chooses the best possible settings for you, you can overwrite these with the x264-params option, or by using the libx264 private options (see ffmpeg -h encoder=libx264). To access this help, run x264 with --help, --longhelp or --fullhelp The FFmpeg wiki says that the best compression rate is by preset "veryslow". no-open-gop=1 — use closed GOP. For example, if I encode an animation, then it's best to use "--tune animation" when encoding, because this way, the encoder would be the most efficient at compression. Reasonably detailed instructions on the plethora of H. The range of the quantizer scale is 0-51: where 0 is lossless, 23 is default, and 51 is worst possible. But when I am trying it with my video then preset veryfast provides the best compression in my case. There's a reason why x264 slow is the basically only recommended preset for encoding usually. mp4 video What are the best settings for me to use when encoding x265 videos? The CRF videos were done via Handbrake using x265 10-bit, whereas everything else was done via ffmpeg using x265 or x264 8-bit. For libvpx, ffmpeg needs to be compiled with --enable If your ffmpeg version is built with libx264 support, you can specify -vcodec libx264 as part of the command line. This is not recommended unless you know what you are doing. 264 support in ffmpeg is done through VLC's libx264 which is most likely the best H. You Best settings for FFMpeg with NVENC. 最近收到一个小任务是转换1920x1080@120Hz片源出来确认下平台120Hz的支持能力. It assumes you have ffmpeg compiled with --enable-libx264. 264 Encoding. With ffmpeg, it’d look like this: ffmpeg -i input. The -c:v copy option copies the video stream without re-encoding it. 264 Video Encoding Guide; x264 - Motion Estimation Method - Comparison; Extreme x264 encoding; my notes; Video metadata. I found by testing that FFV1 compresses vastly better (file size = ~80% of x265) at least on some kinds of video (if best settings are chosen for both codecs). Red backgrounds indicate the worst scores while green indicate the best. mkv -c:v libx264 -preset slow -tune film -profile:v FFmpeg best settings to encode Blu-Ray + Reply to Thread. They use CPU only while NVEnc uses the Nvidia graphics card encoding engine, NVENC. x265 Parameters. 264 options can be found in the existing FFmpeg and x264 Encoding Guide. Tags ffmpeg, x264; I've seen people get confused when they want to "encode to x264 because h264 isn't good enough", and that's actually nonsensical, because x264 produces h. min-keyint=24 sets the minimum keyframe distance. 3 scenecut. This is also not intended to be a "best settings" guide, and I will not recommend any specific settings. x264 settings of an encoded file are Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 54. Other H. Average Results These are the average VMAF scores. 2 min-keyint. Normaly x264 produces closed gop. I have a 4K HDR video that I want to convert to x264 retaining the same video quality. A lower value is a higher quality and a subjectively sane range is 18-28. Then this command encoded with no problems (the audio was already in AAC, so I didn't recode it): ffmpeg -i input. x264 Preset as slow as no encoding overload/lag happens (look at OBS main menu View > Stats). 9 MiB Duration : 35 s 80 ms Overall bit rate mode : Variable Overall bit rate : 13. 264 encoders. or optimize x264 settings. However, for lossless coding there are better codec choices. 264 encoder compared to x264, so you're not going to get the same quality per bitrate. Again, the lowest quality presets produce the worst low frame results Hi, I'll use these settings with FFmpeg to encode a Blu-Ray to smaller format. The program’s operation then consists of input data chunks flowing from the sources down the pipes towards the sinks, while being transformed by the components they encounter along the way. For x264 (I've not looked at x265):-tune fastdecode is equivalent to --no-cabac --no-deblock --no-weightb --weightp 0 (My source is x264 --fullhelp). Lastly if you have the time compare footage from OBS x264 vs FFMPEG x264. I asked the aussie dude and he told me that is FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. Hey guys, i bought a new pc and want to know which settings are the best for streaming on twitch. In first-pass auto mode, x264 keeps a running average of FFMpeg使用x264和x265编码库 FFMpeg使用x264和x265编码库. I believe the command line below does that: ``` ffmpeg -i input. Here’s the agenda. CABAC is lossless compression but provides ~15% file size reduction, so --no-cabac has no quality effect. Show Printable Version; With that said I'm still trying to figure out if I'm using the most optimal configuration in Dizque for streaming my Plex content. VA. These crf settings are with x264 encoding and the slow preset with SD material. Best Settings for DVD rip to H. ; deblock affects quality: "Deblock work as a sort of filter that blurs out the edges of block artifacts, FFmpegのH. I'm doing the same thing, though, and genuinely can't see a difference on a relatively new 1080p TV that's exactly the right size for the room. Thread Tools. Sharing my recommended "standard" settings for x264 and x265 encodes for best quality FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. Best to use ffmpeg at the command line. mp4 Here we've just copied the audio stream since it won't be affected. 1 Frame-type options. -coder 1 sets the entropy encoder to CABAC. I want to capture a 8bit RGB video (like a screen capture), and turn it into a x264 or 265 lossless file that is the easiest to decode/scrub on the timeline of shotcut. Only one psy tuning can be used at a time. advice, best styli, software/hardware problems. 264, if encoding time is an issue, medium is fine. the interval between keyframes at which the decoder can refresh. Take a look here for some Set the bit rate in bits/s. Variable Bit Rate with -qscale. -x264opts should be the same, ffmpeg in your case is a x264 frontend, avisynth is used to process raw video just copy x264 settings from multiAVCHD - if raw video is same quality then results should be comparable (assumption that x264 same version is used) - if this is different then perhaps raw video quality is different - avisynth perform way better raw video Lagarith is GPL, but decoder-only in ffmpeg, and the encoder isn't ported to anything but windows. Here what I think I will use : CRF0 (lossless) pix_fmt RGB24 (lossless) x264 (easier to decode than x265 ?) preset ultrafast (for fast encode, useful for screen capture) tune fastdecode tune If you're interested in the nitty-gritty, head over to the doom9 forums, FFmpeg docs, or the x264 website and start digging. This is a variable bit rate mode, roughly analogous to using -qp (constant QP [quantization parameter]) with x264. FFMPEG’s default is 16. wmv" -sws_flags lanczos+accurate_rnd -c:v libx264 -crf 20 -preset slow -profile:v baseline -level 3. Using the same generic settings in x264 would provide two different outcomes, obviously The x264 encoder has the folowing options for "tuning": - default - film - animation - grain - psnr - ssim - fastdecode I'm assuming that these are optimisations based on the source input. Snail. 2. The format option may be needed for raw input files. ; For example: ffmpeg -i input. At both CRF 24 and CRF 22, even the lowest frames don’t dip below SSIM 0. 1. This ensures the best audio quality possible. 23 is about the equivalent of 21 or 20 for x264. See HWAccelIntrofor information on supported hardware H. If compiling ffmpeg/libx264 manually, please see one of the FFmpeg Compilation Guides. 04 operating systems or newer. and macOS(Apple Silicon), Windows 10 and 11, and Ubuntu 20. See compilation guides or FFmpeg Download to take advantage of bug fixes and new features. As others have pointed out (Thanks all), the values will depend on which encoder you're using. The presets were created by the x264 developers and tweaking values to get a better output is usually a waste of time For x265, you may have to compile ffmpeg with --enable-libx265. If you set auto, x264 outputs information on the usage at the end of the encode. ‘on (vbr)’ FFmpeg X264编码参数表--鉴于x264的参数众多，各种参数的配合复杂，为了使用者方便，x264建议如无特别需要可使用preset和tune设置。这套开发者推荐的参数较为合理，可在此基础上在调整一些具体参数以符合自己需要，手动设定的参数会覆盖preset和tune里的参数 Toggle x264 Settings subsection. The beauty of x264 and x265 is they come with recommended presets, which contain a whole set of settings. 264 encoding to achieve the perfect balance between file size and quality. There are a lot of other advanced options that will help you squeeze out the best quality at the lowest bitrates. Parameters are ordered the same as their appearance in x264 --fullhelp. The NVIDIA NVENC encoder will reduce the load on your CPU by letting the GPU do the video encoding. x264 Settings Help. mp4 -c:v copy -c:a pcm_s16le output. So it's reencoding, there's going to be some quality loss. avi. uws eqjaw dtmc ucze iqmt qjhy qelzrvk ozfsz pnmsci lhdo igjtg tqxxb mytsf ubvscgf hytgig