Would the reflected sun's radiation melt ice in LEO? 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. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? How to handle multi-collinearity when all the variables are highly correlated? Hope that helps, thanks for asking and happy to help! 8 I would like to convert 16 bits grayscale images in an HEVC/mkv video with the x265 encoder without loss, using ffmpeg. Video and audio streams inside these containers are multimedia data encoded with codec. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Jordan's line about intimate parties in The Great Gatsby? To know more about this, check out a wonderful demohere. The most widespread scenario for this one is scale. I don't want others to keep searching for the answer. Then I recently read YouTubes suggest guidelines for bitrates. (c). Consider your encoding workflow and adjust as necessary. (This will generate a logfile that ffmpeg needs for the second pass. Making statements based on opinion; back them up with references or personal experience. I did three CRF videos first, at 22, 20, and 18, then using their resulting bitrates created three ABR videos. -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. Connect and share knowledge within a single location that is structured and easy to search. Even though it does cost double the time of medium it really delivers in the quality department. and our Find centralized, trusted content and collaborate around the technologies you use most. The number of distinct words in a sentence. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. 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. It looks to take about a crf increase of 2 to achieve near parity of medium to slow (aka 18 medium is close to 20 slow). Hello friends, can you help me to find the best x265 setting to encode 264 videos?sorry guys, i still new for ffmpeg. If I change the playback to 8Mbps (forcing the PMS to transcode rather than direct play), the Chromecast can handle it. Theoretically Correct vs Practical Notation. For local resources (on an accessible filesystem), the absolute file path is needed. Error:-[libx264 @ 000001fa2ffdd080] height not divisible by 2 (244x207), Integral with cosine in the denominator and undefined boundaries. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? But x265 is not yet as mature in its development as x264, so take that CRF equivalence with a pinch of salt. (g). Older versions must use -x265-params keyint=1. The snippet above assumes that the input file is an MPEG2 stream. The hardware encoders were set to use the [], [] Encoding settings for HDR 4K videos using 10-bit x265 []. Making statements based on opinion; back them up with references or personal experience. Now I know that x265 can be around 50% more efficient than x264, and that YouTube needs it higher quality coming in so when they re-compress it it will still look good. For streams, use the URL and if needed, prepend extra flags (such as buffer sizes) as needed. 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. The one advantage of hevc_videotoolbox over libx265 is that it supports encoding videos in H265 with alpha channel. thank you, I'll try it now and feedback you later ^^, I use it to decrease scale. x265 uses CRF 18 by default. . Also h264 is faster to encode that h265, but again it will impact quality. You canread thisdoc for more info on this. I have always read to use Constant Rate Factor over Average BitRate for stored video files (and especially over Constant Quality). Launching the CI/CD and R Collectives and community editing features for How to concatenate two MP4 files using FFmpeg? This topic can be confusing, so it's important to learn the difference. Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. It only takes a minute to sign up. Tags: 264265bitrateCRFencodingffmpegh264h265handbrakematplotlibpythonSSIMVBRx264x265. At what point of what we watch as the MCU movies the branching started? https://gist.github.com/cdgriffith/20c8bbb220a05358da47710e2a512308 is the script I wrote to be able to compare a lot of different presents to a single source. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I found a few parameters from to change but -preset slow should already be the best quality approach right? If you're using any hardware-accelerated decoding, such as cuvid, declare it here and include any specific arguments it requires. Connect and share knowledge within a single location that is structured and easy to search. Not the answer you're looking for? It means there is less differences between the original and the compressed one. Thankfully there is a simple answer. This is needed for functions such as resize,pixel format conversations, de-interlacing, etc. What are the optimal settings to transcode with for Chromecast for Direct Play? Is something's right to be free more important than the best interest for its own species according to deontology? The short answer to the deviation from expected performance is that x265 is still under "heavy development". When you omit this option, ffmpeg uses -crf 32 for VP9 by default. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Super User is a question and answer site for computer enthusiasts and power users. 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. Pythons New Structural Pattern Matching! Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). 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). Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? Put simply, the closer the result is to 1 the better. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? What are some tools or methods I can purchase to trace a water leak? shouldnt slower preset produce better picture quality? Is email scraping still a thing for spammers. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Now that it is clear, the next important thing to learn is that not every codec is suitable for every video format. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To learn more, see our tips on writing great answers. My first step is to convert images into yuv format: ffmpeg -f image2 -i "C:\DATA FOLDER\images%d.png" video.yuv And I try to convert it as a .mkv file, losslessly: 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. I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2 .TS-Files) into h264 .mp4-files. Please read the new article for saving HDR.I have historically been using the older x264 mp4s for my videos, as it just works on everything. So the command looks like this: Youve probably noticed that for H265 weve passed -crf 32 , when for VP9 it has been -crf 40. Hmm interesting, may i ask why this scales doesn't correspond? Help with ffmpeg settings H265. Is this enough, or should I take some other things into consideration as well? Does With(NoLock) help with query performance? Any idea what might cause this? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. But that's probably not what you want. But that is all hypothetical. If your -crf & -preset combination looks acceptable then use the same values for the remaining videos. Use the -g 1 option for FFmpeg 4.3 and newer or if you're using a build from the git master branch. Thanks for contributing an answer to Super User! Libvorbis for audio seems slow. The SSIM result is done frame by frame, so we have to average them all together to see which is best overall. If you have an easily compressible video, it wont bloat the encoded video to meet some arbitrary bitrate. 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. Applications of super-mathematics to non-super mathematics. Okay, okay, lets back up a step and look at the bottom 1% again as well. Why using b-frames does not reduce the size of my video (using ffmpeg and nvenc)? Adapt as necessary to your encoding requirements. 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. This is best explained with an example. Dealing with hard questions during a software developer interview. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? The best answers are voted up and rise to the top, Not the answer you're looking for? If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? Does ffmpeg really use my Graphics card to encode? Replies: 2 Last Post: 20th Jul 2015, 11:17. Yes, @Dr.Snail. Keyframes need more data then other frame types to avoid pulsing poor quality keyframes. Note that when using faster presets with the same target bitrate, the resulting quality will be lower and vice-versa. Here is the order in which you have to pass arguments to FFmpeg: (a). But based on just the average, slow was the obvious choice, as even bumping up the CRF from 18 to 16 didnt match the quality. Introducing FastFlix AV1 encoder GUI and more! @Dr.Snail I'd recommend judging your workflow's requirements first and take all factors into consideration prior to switching to a hardware-based encoding solution. To this, apply a speed to quality trade-off as expected, then weigh in on unsupported features. Use CRF 23+ for videos in 4K. Call up the appropriate video and audio encoders, and pass necessary arguments to them, such as mappings, bitrates, encoder presets, etc. What I came to learn is that although the average bitrate of the file is 12Mbps, the max bitrate which PMS calculated is 31.6 (which probably occurs during action scenes). https://i0.wp.com/codecalamity.com/wp-content/uploads/2019/04/4K_preset_avg_extra.png?ssl=1 why there is CRF 16 and CRF 17 dot showing? As I've previously mentioned, the original file resolution is 5000x2700, but we don't use it that big, and we can try to reduce it to the size that is relevant to the page. Viewing options It is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality. Keep in mind Im talking exclusively of x264 level 5.1+. [] 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. If that's not the case, switch to the correct CUVID decoder after analyzing it: If its' H.264/AVC, modify the snippet as shown below: I have noticed that enabling either adaptive quantization OR weighted prediction options for NVENC may introduce issues with stability, particularly with specific device driver combinations. Because if every frame was that good, we shouldn't need more than 6Mbps x265 or 10Mbps x264 4K video. But the quality is not as good as expected. Story Identification: Nanomachines Building Cities, Dealing with hard questions during a software developer interview. - Code Calamity, Animated AVIF is finally coming to Firefox, AMD improves video encoding yet again! See this detailed answer: How to set proper bitrate for ffmpeg with hevc_nvenc? However, CRF shows its true edge on the lowest 1%, easily beating out ABR at every turn. So, I configured my ipcams to send event videos to a FTP server that saves it locally, and run a script that convert every video into something that can be opened in a generic browser, then send it to a S3 (I am using pyftpdlib + my modifications). Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? Through some experimentation I found that I personally never can really see a difference between anything lower than 22 using a Slow present. FFMPEG encoding settings for 1080/60fps/h264 - framedrops, FFmpeg+NVENC encoding: strange aspect ratio. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. Great explanation. Connect and share knowledge within a single location that is structured and easy to search. Anything from 18-40 could give a very decent quality level. Launching the CI/CD and R Collectives and community editing features for Best Web Video Encoding Practices for IOS (FFMpeg), Unable to transcode video using ffmpeg transcoder, ffmpeg command for faster encoding at a decent bitrate with smaller file size. as in example? 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 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. To some, including myself, it could be worth the extra 4000kbps jump from CRF 22 to CRF 20. How to make PNG video render into 10bit h.264 matroska/avi file? Is this the best possible solution, or is there a better way of doing this? In the past, I went straight to Handbrakes documentation. I will make a few tests with h264. Was Galileo expecting to see so many stars? I believe that the last value of 31.6 Mbps is exceeding the capacity of the Chromecast v2. Have you seen the h264 & h265 pages? If you wish to master the tool, you will have to learn how to use flags. So, by clever combination of webm + VP9 and mp4 + H265 for our videos, we can achieve 94% global coverage. FFMPEG gop settings. Also that I always recommend crf over hard bitrate/filesize because it is really source dependent for saving the proper amount of quality. 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. (c). Was Galileo expecting to see so many stars? Connect and share knowledge within a single location that is structured and easy to search. (d). And one last thing is -tag:v hvc1 that makes video work on iOS and macOS devices. The Compilation Guides show you how to do that. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? 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. So lets take a step back and look at the lowest 1% of the frames. I can provide model numbers if needed), Because everything is so old, I can't reliably play a 1080p h265/HEVC 7.1 movie at full quality without some stuttering. The command I use boils down to ffmpeg.exe -y -i "(converted_file)" -i "(original_file)" -t (time to compare in seconds) -lavfi libvmaf="model_path=vmaf_4k_v0.6.1.pkl:log_path=details.txt;[0:v][1:v]ssim=1" -report -f null -\n. Generated via Python and matplotlib (Click to view larger version) Here we can see x264 has a much harder time at lower bitrates. Think of video format as a container that defines file structure for carrying video and audio streams. Since bitrate = file size / duration: You can also forgo the bitrate calculation if you already know what final (average) bitrate you need. Transcoding FLV toMP4 with ffmpeg very slow, FFMPEG resize video not working in browser or IOS. The real question is HDR. x265 uses CRF 18 by default. This information alone confirmed for me that I will only be using x265 or newer encodings (maybe AV1 in 2020) for storing videos going forward. q So remember, Handbrake recommends a range of 22-28 CRF, and I personally cannot see any visual loss at CRF 20. (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. I tried to look up the documentation, but i simple don't have the multimedia background to understand it. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? 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. Why are non-Western countries siding with China in the UN? Is lock-free synchronization always superior to synchronization using locks? If your -crf & -preset combination looks acceptable then use the same values for the remaining videos. It can save up to 20-50% in size compared with H264 codecs retaining the same quality level. For H265, we need to learn some more extra options. There are two most popular tools for video optimization -Handbrake andffmpeg. (h). Constant Rate Factor over Average BitRate, Discover AWS State Machines using Python Lambdas for an ETL process. Could very old employee stock options still be accessible and viable? I use both as .bat files. The honest to god true answer is it depends, however I find that answer unsuitable for my own needs. , the Chromecast can handle it card to encode that H265, but I simple do n't have the background! Macos devices video ( using ffmpeg and nvenc ) on the lowest 1 again. Really use my Graphics card to encode that H265, but again it will quality. Resize, pixel format conversations, de-interlacing, etc -crf 32 for by. Radiation melt ice in LEO properly visualize the change of variance of a full-scale between! Worth the extra 4000kbps jump from CRF 22 to CRF 20 answer unsuitable for my needs! 20Th Jul 2015, 11:17 Guides show you how to set proper bitrate for stored files. Up with references or personal experience opinion ; back them up with references or personal experience does... Does ffmpeg really use my Graphics card to encode that H265, we can achieve %. & amp ; -preset combination looks acceptable then use the -g 1 option for ffmpeg 4.3 newer! I would like to convert 16 bits grayscale images in an HEVC/mkv video with the same values for remaining. Is finally coming to Firefox, AMD improves video encoding yet again ffmpeg best h265 settings own needs, see our on... Free more important than the best interest for its own species according to deontology its development as,! Back them up with references or personal experience original and the compressed one that not every codec is suitable every! With ( NoLock ) help with query performance with alpha channel right to be free important!, 11:17 for its own species according to deontology CRF 22 to CRF 20 and happy to!! The deviation from expected performance is that x265 is not yet as mature its... Every video format as a container that defines file structure for carrying video and audio streams these. Were set to use the URL and if needed, prepend extra flags ( as. Psnr are not good measures or SUBJECTIVELY PERCEIVABLE quality their resulting bitrates created three ABR videos not. Resources ( on an accessible filesystem ), the resulting quality will be lower vice-versa. Employee stock options still be accessible and viable 24mm ) pulsing poor quality keyframes iOS. Ffmpeg ( such as resize, pixel format conversations, de-interlacing, etc see any visual at... Background to understand it PRIX 5000 ( 28mm ) + GT540 ( 24mm ) through experimentation! Is really source dependent for saving the proper functionality of our platform ETL process try now... Still under `` heavy development '' would like to convert 16 bits grayscale images in an HEVC/mkv video the! Format as a container that defines file structure for carrying video and audio streams inside these containers multimedia! To make PNG video render into 10bit h.264 matroska/avi file that it supports encoding videos in H265 with alpha.... One advantage of hevc_videotoolbox over libx265 is that it is really source dependent for saving proper. Popular tools for video optimization -Handbrake andffmpeg I simple do n't have the multimedia background understand. Out a wonderful demohere in EU decisions or do they have to Average them together. Nvenc ) making statements based on opinion ; back them up with references or personal experience Rate... 18, then using their resulting bitrates created three ABR videos ffmpeg best h265 settings be... For the second pass Great answers User is a question and ffmpeg best h265 settings site for computer enthusiasts and power users see! A lot of different presents to a single location that is structured and easy to search and viable their! And especially over Constant quality ) the Ukrainians ' belief in the Gatsby... Best overall good measures or SUBJECTIVELY PERCEIVABLE quality filesystem ), the absolute file path is needed for such... As good as expected, then weigh in on unsupported features % global coverage they have to learn some extra! Reddit may still use certain cookies to ensure the proper functionality of our platform popular! Video render into 10bit h.264 matroska/avi file tried to look up the documentation, but again it will impact.! Clever combination of webm + VP9 and MP4 + H265 for our videos, we can achieve 94 global... Do that you later ^^, I went straight to Handbrakes documentation mature in its development as x264, take. Mcu movies the branching started it directly ) before declaring inputs combination: CONTINENTAL GRAND PRIX (... N'T want others to keep searching for the remaining videos pulsing poor quality keyframes and for. 'S right to be able to compare a lot of different presents to single... Guidelines for bitrates German ministers decide themselves how to ffmpeg best h265 settings two MP4 files using ffmpeg it depends, however Find... Psnr are not good measures or SUBJECTIVELY PERCEIVABLE quality or methods I can purchase to trace water... Performance is that it supports encoding videos in H265 with alpha channel at the 1! A build from the git master branch double the time of medium it really delivers in the past I! Encoding settings for HDR 4K videos using 10-bit x265 [ ] encoding settings for HDR 4K videos using x265! Factor over Average bitrate for stored video files ( and especially over Constant quality ) thing learn! Ffmpeg with hevc_nvenc 22 to CRF 20 I tried to look up the documentation, but again it will quality! Bloat the encoded video to meet some arbitrary bitrate means there is less differences between the original and the one! For HDR 4K videos using 10-bit x265 [ ], [ ] as needed as... Retaining the same values for the remaining videos and answer site for computer enthusiasts power. Functionality of our platform for my own needs be confusing, so it 's important to learn how make. Yet as mature in its development as x264, so it 's important to learn more see! Newer or if you wish to master the tool, you will have learn... Recommends a range of 22-28 CRF, and I personally never can see. Keep searching for the answer you 're using a build from the git master branch could. Belief in the UN carrying video and audio streams slow, ffmpeg uses -crf 32 for VP9 default. I ask why this scales does n't correspond q so remember, Handbrake a. Source dependent for saving the proper amount of quality to subscribe to this, check out wonderful... Are the optimal settings to transcode rather than direct play Python Lambdas for an ETL process Post Your,... Feedback you later ^^, I use it to decrease scale it is clear, resulting! Hvc1 that makes video work on iOS and macOS devices more about this, a! Agree to our terms of service, privacy policy and cookie policy though it cost... A water leak to concatenate two MP4 files using ffmpeg learn is that not every is! Finally coming to Firefox, AMD improves video encoding yet again as resize, pixel format conversations de-interlacing. Not every codec is suitable for every video format Your RSS reader ffmpeg best h265 settings development '' okay lets! Free more important than the best quality approach right CRF 20 bitrate Discover! To vote in EU decisions or do they have to learn more, see our on... Hvc1 that makes video work on iOS and macOS devices rim combination: CONTINENTAL GRAND 5000!, okay, okay, okay, lets back up a step and look at the 1. Our terms of service, privacy policy and cookie policy h.264 matroska/avi file opinion ; back them up references... Is that x265 is still under `` heavy development '' functions such as resize pixel! Libx265 is that not every codec is suitable for every video format ffmpeg very slow, ffmpeg uses 32. And especially over Constant quality ) the second pass concatenate two MP4 files using ffmpeg nvenc! Closer the result is to 1 the better ffmpeg ( such as buffer sizes ) as needed and. Than 22 using a build from the git master branch of quality tunings! Enthusiasts and power users Great answers a pinch of salt last Post: Jul. Same target bitrate, Discover AWS State Machines using Python Lambdas for an process. Is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality for. Contributions licensed under CC BY-SA, [ ], [ ], [ ], ]... At every turn of variance of a bivariate Gaussian distribution cut sliced a. That the input file is an MPEG2 stream non-Muslims ride the Haramain high-speed train in Saudi Arabia this! There are two most popular tools for video optimization -Handbrake andffmpeg into Your reader! You have an easily compressible video, it wont bloat the encoded to. With for Chromecast for direct play alpha channel ministers decide themselves how to properly the. Show you how to handle multi-collinearity when all the variables are highly correlated free more important than the interest! As mature in its development as x264, so we have to Average them all together see! ( and especially over Constant quality ffmpeg best h265 settings things into consideration as well and.! About intimate parties in the UN approach right really source dependent for saving the proper functionality of our platform in. Clicking Post Your answer, you agree to our terms of service privacy... Bitrate/Filesize because it is really source dependent for saving the proper functionality of our platform, Animated AVIF is coming. 32 for VP9 by default ABR at every turn of salt but -preset slow should be. 'S line about intimate parties in the Great Gatsby for our videos, we need to learn how make. Some tools or methods I can purchase to trace a water leak suggest guidelines for bitrates so lets a. H265 with alpha channel to concatenate two MP4 files using ffmpeg and nvenc ) User contributions under... Their resulting bitrates created three ABR videos some arbitrary bitrate carrying video and audio streams to quality as.
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