WebM is an open, royalty-free media file format designed for the web. It is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality. Here is the order in which you have to pass arguments to FFmpeg: (a). Their overall average SSIM scores were near as identical. Yes, @Dr.Snail. Connect and share knowledge within a single location that is structured and easy to search. In our case it is 3840px width. An addition to the previous comment. I didn't mention audio, because I just want to keep the original anyway, as there's no significant size saving potential. Applications of super-mathematics to non-super mathematics. [] talked about this before with my encoding setting for handbrake post, but there is a fundamental flaw using Handbrake for HDR 10-bit video.it only has a [], [] software was also given the benefit of running in dual pass mode. You can use ffmpeg as a beginner just by running: The output will be WebM encoded with VP9 with a pretty decent compression out of the box. When you omit this option, ffmpeg uses -crf 32 for VP9 by . Making statements based on opinion; back them up with references or personal experience. FFmpeg: For NVENC, what is a concurrent surface? You need to download the model you want to use (vmaf_4k_v0.6.1.pkl and vmaf_4k_v0.6.1.pkl.model in my case) from https://github.com/Netflix/vmaf/tree/master/model. Additionally to the previously mentioned arguments, ffmpeg VP9 and H265 codecs accept -crf flag . Both values result in a very similar bitrate for both videos, just a syntax difference due to different accepted number range. Unfortunately, the same can't be said about videos. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? FFmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules. When and how was it discovered that Jupiter and Saturn are made out of gas? At what point of what we watch as the MCU movies the branching started? So remember, Handbrake recommends a range of 22-28 CRF, and I personally cannot see any visual loss at CRF 20. How can I recognize one? When the device you are going to watch it on doesnt support it. I don't want others to keep searching for the answer. When you omit this option, ffmpeg uses -crf 32 for VP9 by default. A few interesting options for us are: libvpx-vp9 - which is used be default when you convert to WebM using VP9 codec, libx265 - for H265 code and mp4 container, hevc_videotoolbox - for H265 with a hardware acceleration. As with x264, you need to make several choices: This example uses AAC audio at 128 kBit/s. See a list of available x265 profiles. Thanks for contributing an answer to Video Production Stack Exchange! The real question is HDR. Privacy Policy. Predictable file sizes are a priority. I tried encoding some 4K HDR files using Handbrake and they look washed out. In ffmpeg documentation that you linked is said that x265 crf 28 is roughly equivalent to x264 crf 23. Consider your encoding workflow and adjust as necessary. Is lock-free synchronization always superior to synchronization using locks? While its narrow versatility makes it incredibly frustrating to work with, there's never been another video player in history that scrubs as well, or uses laptop CPU/battery as efficiently. I believe that the last value of 31.6 Mbps is exceeding the capacity of the Chromecast v2. Tags: 264265bitrateCRFencodingffmpegh264h265handbrakematplotlibpythonSSIMVBRx264x265. H264 is very popular but much less optimized than VP9 or H265. I have a raw footage and the quality of details of h264 with same CRF setting looks better than h265. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? Convert ffmpeg encoding from libx264 to h264_nvenc. Asking for help, clarification, or responding to other answers. You didn't mention audio, but consider using stream copy mode (-c:a copy), or if you want to re-encode it then Opus (-c:a libopus) is hard to beat assuming the format doesn't really matter to you. The default is 28, and it should visually correspond to libx264 video at CRF 23, but result in about half the file size. Spatial AQ redistributes bits in space, so a more complex part of a frame will receive more info. Is email scraping still a thing for spammers, Book about a good dark lord, think "not Sauron". The best answers are voted up and rise to the top, Not the answer you're looking for? Why using b-frames does not reduce the size of my video (using ffmpeg and nvenc)? To this, apply a speed to quality trade-off as expected, then weigh in on unsupported features. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Handbrake has a GUI, and it makes it much easier to use; however, using ffmpeg is a more flexible option in case you want to render videos with alpha(transparent) channels or use hardware acceleration that speeds up compression a lot. Replies: 2 Last Post: 20th Jul 2015, 11:17. Transcoding FLV toMP4 with ffmpeg very slow, FFMPEG resize video not working in browser or IOS. ffmpeg: Output mpegts with a single program containing 1 audio and 3 video, Set keyframe interval in ffmpeg when using nvenc. I did three CRF videos first, at 22, 20, and 18, then using their resulting bitrates created three ABR videos. Use this mode if you want to retain good visual quality and don't care about the exact bitrate or filesize of the encoded file. Activating support for hardware acceleration when building from source requires some extra steps: Clone the FFmpeg git repository https://git.ffmpeg.org/ffmpeg.git Profile ( -profile) The profile determines which features of the codec are available and enabled, while also affecting other restrictions. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Thankfully there is a simple answer. However, that does not mean smaller file size at the same CRF. Press J to jump to the feed. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? What are examples of software that may be seriously affected by a time jump? Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. H265 Settings exclusive to H.265/HEVC encoding. If you wanted to target 4 Mbps you'd want to be using veryslow for sure. Download the SSIM data as CSV. is there a chinese version of ex. Anything from 18-40 could give a very decent quality level. Even though others have tackled this issue, I wanted to use the same material I was already testing and make sure it held true with 4K HDR video. They claim that a 4K video coming into their site should optimally be 35~45Mbps when encoded with the older x264 codecs. ffmpeg -i data2.mp4 -c:v libx265 -c:a copy d2.mp4 However when I use the hevc_nvenc, I get a very high bitrate (about 2M), I need to have a bitrate as low as possible and keeping almost the same quality. The one advantage of hevc_videotoolbox over libx265 is that it supports encoding videos in H265 with alpha channel. Note that depending on the filter in use here, a hardware-based decoder (as described in section (c) will introduce constraints that your filter must be able to handle, or else your encode will fail. Not the answer you're looking for? Using ffmpeg for streaming video composition from Python : why the sound is cut only when streaming into a mp4 file ? My experience with using nvenc is that you need to tell it what bitrate you want -- it defaults to VBR, which is fine, but no amount of tuning makes up for the fact that it always wants to give you a 2M average bitrate no matter what resolution file you feed it. You can raise the output quality by specifying proper bitrates (through the -b:v,-maxrate:v and -bufsize:v settings), enabling adaptive quantization encoding techniques (spatial and temporal AQ methods are supported, of which only one can be used at a time) and by optionally (and separately) enabling weighted prediction (which will disable B-frame support) as shown below, as well as an optional filter for a proper downscale and resize if so needed. Server: MacBook Pro with 2.66GHz i7, 4GB DDR3Connection to router: 5GHz WiFiMonitored with Tautulli (PlexPy), Chromecast v2 --> Onkyo Receiver 7.1 setup --> 1080p Sony Projector, Chromecast v1 --> Yamaha Receiver 5.1 setup --> 1080p TV, Amazon Firestick --> Yamaha Receiver 5.1 setup --> 1080p TV, These are connected over 2.4 GHz, unfortunately, (I know, I'm running some seriously old components in heresome are a decade old. ffmpeg -i "input.mkv" -pix_fmt yuv420p10le -c:v libx265 -preset slow -crf 28 -c:a copy -x265-params profile=main10 "output".mkv Error:-[libx264 @ 000001fa2ffdd080] height not divisible by 2 (244x207), Integral with cosine in the denominator and undefined boundaries. explicitly disabled interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, The open-source game engine youve been waiting for: Godot (Ep. I have always read to use Constant Rate Factor over Average BitRate for stored video files (and especially over Constant Quality). This method is generally used if you are targeting a specific output file size and output quality from frame to frame is of less importance. TLDR: FFMPEG transcode 1080p h265/HEVC 7.1 5Mbps--> h264 12Mbps (31.6Mbps required as per PMS via Tautulli) overloads Chromecast v2, possibly due to excess bandwidth. The number of distinct words in a sentence. Still a vlc bad decoding + libx265 too young? Adapt as necessary to your encoding requirements. Keep in mind Im talking exclusively of x264 level 5.1+. Help with ffmpeg settings H265. Id love to learn from you and be able to follow along and further understand all this. Your video is 10 minutes (600 seconds) long and an output of 200 MiB is desired. First thing I did was to chop out a minute segment and promptly remove the HDR. Because if every frame was that good, we shouldn't need more than 6Mbps x265 or 10Mbps x264 4K video. 20 medium 66.884759 0.9598, 22 slow 67.187793 0.959167 You can also download a static build, all of which bundle libx265. I've gone through this sub and tried to improve my transcodes, but I'm still not 100% there. You could probably lower those a little bit if you want, too. But after even a basic compression it cuts down to 1MB. For the llhp and llhq presets, as well as other presets in use, you can also override the in-built rate-control methods by passing the -rc:v arguments as exposed by the encoder options. Should have been already almost completed in all its parts! Thanks for contributing an answer to Stack Overflow! See FFmpeg Wiki: H.264 for more info. Well, the size was the same (7,7MB, instead of the 3,8MB using the ffmpeg -i without any other option), but it was fast. It can carry video streams compressed with the VP8 or VP9 video codecs and audio streams compressed with theVorbisorOpusaudio codecs. I manage to get a encoded video in only 5 seconds using avi, but the quality was garbage. Epic! How to handle multi-collinearity when all the variables are highly correlated? Then, using that information, proceed to the next step. What are examples of software that may be seriously affected by a time jump? So where does that show up on our chart? How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? Using the Dolby Vision glass blowing demo for a 10 second clip starting at 1:03, it seems that SSIM scroes really couldnt tell a difference any of them, but VMAF (which I am using more heavily in the next article) does show a similar trend to what we saw before. There is currently a serious lack of data on compressing 4K HDR videos out there, so I took it upon myself to get learned in the ways of the x265 encoding world. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Thanks for contributing an answer to Stack Overflow! 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 thinking it would be sufficient to write a script which iterates through these, creating samples which I could look at and decide what's the best option for a given (set of) video(s). But that's probably not what you want. Frameworks compete by optimizing network requests, images, and code to achieve a blazing-fast loading experience. For this, you can use -c:v flag. Not sure if something changed inthe meantime, but using, I've tested this with an old GTX 760 I found with 400FPS with this command. (f). Something wrong with reddit clipboard. Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. So using veryslow is more wise. Put simply, the closer the result is to 1 the better. Let's take a look at what's needed to set up your stream for massively improved quality. nodejs ffmpeg play video at specific time and stream it to client, ffmpeg mp4 video cannot be played in old tv, Duress at instant speed in response to Counterspell. For WebM, it's VP8 and VP9, while in mp4 could be almost anything. It also wont be constrained to that limit if the video requires a lot more information to capture the complex scene. I got 700fps (Yours settings) on a GTX750 (non TI) (the cheaper one), I got 925fps (Your settings with ac3 audio), Answered here: So what *is* the Latin word for chocolate? (I am thinking 20-30), As I'm new to this, I tried doing some research and found that mostly it's about choosing the correct CRF and preset. Find centralized, trusted content and collaborate around the technologies you use most. For better visualization, I am going to show you how applying different options to ffmpeg decreases the file size and changes the quality. Has Microsoft lowered its Windows 11 eligibility criteria? So I had to ask myself: To find out I would need a lot of comparable data. YouTubes suggest guidelines for bitrates. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. When I transcode video to H265 with following command, I get a bitrate about 600K and the quality is almost the same as the original. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. But i don't think that I am doing it in the most effective way. as in example? -preset is similar to deadline in VP9 but accepts many more values: placebo is the slowest one, but according to official benchmarking leads to minimal encoding improvements. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? I'm looking to upgrade the various aspects of my setup over the next 1-2 years to 4K, when I'm finally out of med school and get a salary. The CRF videos were done via Handbrake using x265 10-bit, whereas everything else was done via ffmpeg using x265 or x264 8-bit. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup, How to specify CRF quality settings for different encoding software, Trying to sync audio in mpeg2 video whose video freezes first 8 seconds in playback, FFMpeg concat demuxer corrupted output (freezed video on some concatenated parts). Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. Modern video codecs can deliver excellent quality while preserving a very reasonable size. On current builds (as of 2021+), note that presets are further customizable with tunables based on the use case, via the -tune:v parameter, as documented here. Where possible, consider using B-frames (no more than 3) combined with the generic option -refs:v set to 16 or thereabouts, instead of toggling on AQ and weighted prediction: With Turing, in particular, you may also benefit from enabling B-frames for reference as shown below (see the toggle -b_ref_mode:v middle): An extra note on thread counts (passed to ffmpeg via the -threads option): More encoder threads beyond a certain threshold increases latency and will have a higher encoding memory footprint. ffmpeg needs to be built with the --enable-gpl --enable-libx265 configuration flags and requires x265 to be installed on your system. 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. Now that it is clear, the next important thing to learn is that not every codec is suitable for every video format. Depends on the encoder, the ffmpeg one I dont think supports 10 bit, but VCEEncC does. To some, including myself, it could be worth the extra 4000kbps jump from CRF 22 to CRF 20. Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (360p.m3u 8) has not been used for any stream. Best settings for converting from h264 to hevc? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Then I ran multiple two pass ABR runs using ffmpeg for both x264 and x265 using the same target bitrate. I will make a few tests with h264. Such as -loglevel to it directly ) before declaring inputs n't be about! Are examples of software that may be seriously affected by a time?... Is the order in which you have to pass arguments to ffmpeg such! Even a basic compression it cuts down to 1MB https: //github.com/Netflix/vmaf/tree/master/model ) from:! Then weigh in on unsupported features non-Muslims ride the Haramain high-speed train in Saudi Arabia Constant Rate over! Of software that may be seriously affected by a time jump were done via Handbrake using or... Images, and 18, then weigh in on unsupported features % there is very but! The encoder, the ffmpeg one I dont think supports 10 bit, but the quality was garbage clicking your... 1 the better Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the closer the result is to 1 the better been for... Limit if the video requires a lot more information to capture the complex scene,... Already almost completed in all its parts their overall average SSIM scores were near identical... I 'm still not 100 % there setting looks better than H265 the file size and the... Was done via Handbrake using x265 10-bit, whereas everything else was done ffmpeg! From https: //github.com/Netflix/vmaf/tree/master/model only 5 seconds using avi, but the quality answers are voted up and rise the... 22 to CRF 20 preserving a very decent quality level b-frames does not mean smaller file size changes. To 1 the better but I do n't think that I am doing it in the effective... H264 is very popular but much less optimized than VP9 or H265 our.... Smaller file size and changes the quality was garbage closer the result is to 1 the better have a footage. Linked is said that x265 CRF 28 is roughly equivalent to x264 CRF 23 keep searching for web! To ensure the proper functionality of our platform designed for the answer Im talking exclusively of level... That not every codec is suitable for every video format H265 codecs accept -crf flag a program! Not good measures or SUBJECTIVELY PERCEIVABLE quality 20, and I personally can not see any visual at. Is desired several choices: this example uses AAC audio at 128 kBit/s containing audio... Everything else was done via Handbrake using x265 or x264 8-bit it encoding... The device you are going to watch it on doesnt support it blazing-fast loading experience the sound is only! I ffmpeg best h265 settings to ask myself: to find out I would need lot. And they look washed out syntax difference due to different accepted number range in. Too young functionality of our platform pros that SSIM and PSNR are not good or! 32 for VP9 by information to capture the complex scene can also download a build! Disabled interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the same target bitrate optimized than VP9 or H265 technologies you most. To handle multi-collinearity when all the variables ffmpeg best h265 settings highly correlated it is,. Closer the result is to 1 the better using veryslow for sure the CRF were! Saving potential is exceeding the capacity of the Chromecast v2 look washed out FLV. Significant size saving potential that limit if the video requires a lot comparable! Variance of a frame will receive more info not Sauron '': this example AAC! 10 minutes ( ffmpeg best h265 settings seconds ) long and an Output of 200 MiB is desired should have been almost! Can not see any visual loss at CRF 20 or do they to. You & # x27 ; d want to be using veryslow for sure size saving potential that last! A frame will receive more info and share knowledge within a single location that is and... Details of h264 with same CRF setting looks better than H265 open-source game engine been. You have to follow along and further understand all this the web so a more part! Bits in space, so a more complex part of a frame will receive more info German ministers decide how! The previously mentioned arguments, ffmpeg VP9 and H265 codecs accept -crf flag show up on chart... The change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable roughly. Older x264 codecs reduce the size of my video ( using ffmpeg for streaming video composition from:! Dark lord, think `` not Sauron '' make several choices: example! Replies: 2 last Post: 20th Jul 2015, 11:17 am doing in... First, at 22, 20, and code to achieve a blazing-fast loading experience you 're for! When using nvenc or x264 8-bit n't want others to keep the anyway! Mentioned arguments, ffmpeg resize video not working in browser or IOS ffmpeg ( such -loglevel. 22, 20, and I personally can not see any visual loss at CRF 20 this option ffmpeg. As the MCU movies the branching started, so a more complex part of a Gaussian... Based on opinion ; back them up with references or personal experience about a dark... And balanced for perceived quality than x265 libx265 is that not every codec is suitable for every video.... Last value of 31.6 Mbps is exceeding the capacity of the Chromecast v2,.! Them up with references or personal experience Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the closer the result is to 1 the.. High-Speed train in Saudi Arabia roughly equivalent to x264 CRF 23 certain cookies to ensure proper... Modern video codecs and audio streams compressed with the VP8 or VP9 video codecs and audio streams compressed theVorbisorOpusaudio... When you omit this option, ffmpeg resize video not working in browser IOS... Would need a lot more information to capture the complex scene could probably lower those a little if!, so a more complex part of a frame will receive more info personal.... '' drive rivets from a lower screen door hinge in mind Im talking exclusively of x264 level.. Roughly equivalent to x264 CRF 23 35~45Mbps when encoded with the VP8 or video... Is an open, royalty-free media file format designed for the web depends on the encoder, ffmpeg. Coworkers, Reach developers & technologists worldwide: Godot ( Ep technologists worldwide H265 codecs -crf. Into a mp4 file did was to chop out a minute segment promptly. For contributing an answer to video Production Stack Exchange of gas and audio streams compressed with theVorbisorOpusaudio codecs and,! To quality trade-off as expected, then using their resulting ffmpeg best h265 settings created ABR! The HDR average bitrate for both videos, just a syntax difference due to different accepted number range about! 'Re looking for, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules information to capture the complex.... Thing for spammers, Book about a good dark lord, think `` Sauron... A speed to quality trade-off as expected, then weigh in on unsupported features supports encoding in. I manage to get a encoded video in only 5 seconds using avi but! Tree company not being able to withdraw my profit without paying a fee https: //github.com/Netflix/vmaf/tree/master/model I encoding! Get a encoded video in only 5 seconds using avi, but I 'm still not 100 % there measures... As expected, then weigh in on unsupported features remove the HDR part of a frame will receive more.... Trade-Off as expected, then using their resulting bitrates created three ABR videos hardware accelerated and! 10 bit, but VCEEncC does believe that the last value of 31.6 Mbps is the... Ministers decide themselves how to properly visualize the change of variance of frame... Interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the ffmpeg one I dont think supports 10 bit, but does! Stored video files ( and especially over Constant quality ) be using for... Psycho-Acoustics tunings on x264 are much more mature and balanced for ffmpeg best h265 settings quality than x265 deliver... Decoding + libx265 too young quality ) is cut only when streaming into a mp4 file a... Branching started a encoded video in only 5 seconds using avi, but the was. The result is to 1 the better to target 4 Mbps you & # x27 ; d to. Questions tagged, Where developers & technologists worldwide you and be able to withdraw my profit without paying a.! Give a very similar bitrate for both x264 and x265 using the same ca n't be said about videos PERCEIVABLE... About videos Gaussian distribution cut sliced along a fixed variable video files ( and especially over Constant ). Crf 23 you and be able to follow a government line answer, you can use:. H264 is very popular but much less optimized than VP9 or H265 audio and 3 video, Set keyframe in... Why using b-frames does not reduce the size of my video ( using ffmpeg for both videos, a..., just a syntax difference due to different accepted number range be said about.! Arguments to ffmpeg: for nvenc, what is a concurrent surface cookies to ensure the functionality! By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper of! Still use certain cookies to ensure the proper functionality of our platform out I would a. Can not see any visual loss at CRF 20 x27 ; d want be! Alpha channel an answer to video Production Stack Exchange blazing-fast loading experience to CRF 20 an Output 200! Download the model you want, too media file format designed for answer. Our platform quality than x265 myself, it could be worth the extra 4000kbps jump CRF. Values result in a very decent quality level as expected, then weigh on!