It also wont be constrained to that limit if the video requires a lot more information to capture the complex scene. It means there is less differences between the original and the compressed one. I believe that the last value of 31.6 Mbps is exceeding the capacity of the Chromecast v2. Super User is a question and answer site for computer enthusiasts and power users. Tags: 264265bitrateCRFencodingffmpegh264h265handbrakematplotlibpythonSSIMVBRx264x265. I have always read to use Constant Rate Factor over Average BitRate for stored video files (and especially over Constant Quality). Aka a old movie with lots of film grain will need a lot higher bitrate than a modern action / adventure move, which will itself needs a lot higher than an animation. First things first, this is NOT a guide for Dolby Vision or HDR10. How can I recognize one? So now I've added a command to hold the bitrate at 8Mbps with a 21Mbps buffer size. When comparing to standard 4.1 profile than yes, x265 outperform it in almost any metric. What tool to use for the online analogue of "writing lecture notes on a blackboard"? 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. (This will generate a logfile that ffmpeg needs for the second pass. On my computer (a fairly good laptop) it usually takes half the video playtime to convert into a mp4 using a generic ffmpeg command that i simple copy and paste from stackoverflow. 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? Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Encode some random segments from typical inputs. Maybe my setup isn't the best: I'm using ffmpeg for transcoding and vlc for review the videos, then i copy the screen content and compare the screens on a program like photoshop. For this, you can use -c:v flag. Higher presets (such as the default medium) have rapidly diminishing returns in quality output while at the same time incurring significant slowdowns in encoder throughput. Is a wanted design with a bigger amount of CRF values or could be considered this way because libx265 is still not mature enough in ffmpeg? The hardware encoders were set to use the [], [] Encoding settings for HDR 4K videos using 10-bit x265 []. The Compilation Guides show you how to do that. Do you think for H.265 but with 1080p and less content that all of what youve posted here would still be applicable or do you think its only for 4k content? We haven't used it in VP9 WebM because its architecture does not require this and always guarantees progressive loading. As a bonus you can use the following nice shell script below that can create for you optimized video in VP9 and H265 with a single command. Well well wishing well, that is even more definitive. FFmpeg: For NVENC, what is a concurrent surface? Find centralized, trusted content and collaborate around the technologies you use most. For example, with constant bit-rate encoding, you can specify -rc:v cbr (which is significantly faster than the cbr_ld_hq rate control method, bringing an additional ~20% boost to throughput). Is this enough, or should I take some other things into consideration as well? The normal wisdom is to use the the slowest you can stand for the encoding time. H265, a.k.a HEVC (High-Efficiency Video Coding), is a codec supported by Apple and shows the same 20-50% better efficiency than its H264 older brother. What is the potential range for a good CRF value? (h). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The horizontal line shows this where x264 needs 14Mbps to match x265s 9Mbps, a 5000kbps difference! What does a search warrant actually look like? Why did the Soviets not shoot down US spy satellites during the Cold War? This is a good starting point on why these values matter. Thank you!! It makes your video web-optimized and results in faster video readiness. rev2023.3.1.43269. This is needed for functions such as resize,pixel format conversations, de-interlacing, etc. Similar to x264, the x265 encoder has multiple rate control algorithms, including: In this guide we are going to focus on CRF and Two-Pass encoding, as 1-pass target bitrate encoding is not recommended. By default, this is disabled, and it is generally not required to set a tune option. The number of distinct words in a sentence, Torsion-free virtually free-by-cyclic groups. It is faster by two orders of magnitude than libx265, but has some drawbacks. What would be the most time effective format and how to convert a raw h.265 video to it? 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). Slower = better video quality and compression. How to increase the number of CPUs in my computer? Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, How do I convert 10-bit H.265 / HEVC videos to H.264 without quality loss? Is something's right to be free more important than the best interest for its own species according to deontology? Reddit and its partners use cookies and similar technologies to provide you with a better experience. Dealing with hard questions during a software developer interview. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Making statements based on opinion; back them up with references or personal experience. The webm was quite small, but take many times the amount of time that mp4 took. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Also that I always recommend crf over hard bitrate/filesize because it is really source dependent for saving the proper amount of quality. When you omit this option, ffmpeg uses -crf 32 for VP9 by . If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? If the source has HDR and I want to preserve it, it should be in 10-bit H.265. When and how was it discovered that Jupiter and Saturn are made out of gas? Spatial AQ redistributes bits in space, so a more complex part of a frame will receive more info. Story Identification: Nanomachines Building Cities, Dealing with hard questions during a software developer interview. The one advantage of hevc_videotoolbox over libx265 is that it supports encoding videos in H265 with alpha channel. 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. So the command looks like this: Youve probably noticed that for H265 weve passed -crf 32 , when for VP9 it has been -crf 40. Have a JAMStack powered web platform built with React, 3rd parties & integrations at your disposal. So, if generally the CRF of h265 are "better" qualitatively speaking than the x264 ones how is possible that the encode results of x265 is worst than x264 with same CRF ? Let's take a look at what's needed to set up your stream for massively improved quality. Thankfully there is a simple answer. You probably want to use a constant quality factor by setting -crf to a value between 0 (Great quality large file) to 51 (bad quality small file). H265 Settings exclusive to H.265/HEVC encoding. So lets take a step back and look at the lowest 1% of the frames. Anything from 18-40 could give a very decent quality level. The most widespread scenario for this one is scale. Learn more about Stack Overflow the company, and our products. 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. Add it next to your -c:v h264_nvenc -c:a ac3 You should also be able to push 2 sessions. Not the answer you're looking for? I tried H.265 10 bit, H.265 12 bit, and H.264 10 bit, and they all ended up looking washed out compared to the original file. You can change this by adding -b:v option to ffmpeg. 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. Is Koestler's The Sleepwalkers still well regarded? Unfortunately, the same can't be said about videos. If you look at the PDF I linked in the last comment, there are many encoders out there - most proprietary. However, there is still a solution. ffmpeg: Output mpegts with a single program containing 1 audio and 3 video, Set keyframe interval in ffmpeg when using nvenc. Maybe something more visible at lower bitrates? Frameworks compete by optimizing network requests, images, and code to achieve a blazing-fast loading experience. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). x265 uses CRF 18 by default. The mode works exactly the same as in x264, except that maximum value is always 51, even with 10-bit support, so please read the H.264 guide for more info. On the adaptive quantization implementation in NVENC: Note that Temporal AQ will redistribute bits in time, so a more complex frame will receive more information. Still, we get a good idea of where these show up. 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. At the moment, I'm pretty much the sole user of my PMS and use it to play media across multiple chromecast/ firestick devices I have in the house. CEO at Pixel Point and software engineer with 10+ years of web development experience. By MvL in forum Video Conversion Replies: 3 Last Post: 8th Jul 2014, 17:55 . RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? I use both as .bat files. Does With(NoLock) help with query performance? (b). But the quality is not as good as expected. So what *is* the Latin word for chocolate? If you wish to master the tool, you will have to learn how to use flags. 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. Asking for help, clarification, or responding to other answers. ffmpeg -i input.h265 -c copy -movflags +faststart output.mp4 The camera's H.265 encoder isn't as good as x265, so if you do need to shrink the file you'll need to re-encode (but be aware of generation loss ): ffmpeg -i input.h265 -c:v libx265 -crf 28 -preset medium -movflags +faststart output.mp4 Adjust -crf and -preset to your liking. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This will be very fast as it is "copying and pasting" the H.265 video into the MP4 container: The camera's H.265 encoder isn't as good as x265, so if you do need to shrink the file you'll need to re-encode (but be aware of generation loss): Adjust -crf and -preset to your liking. Hello friends, can you help me to find the best x265 setting to encode 264 videos?sorry guys, i still new for ffmpeg. I've gone through this sub and tried to improve my transcodes, but I'm still not 100% there. YouTubes suggest guidelines for bitrates. To learn more, see our tips on writing great answers. It is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality. I tried to look up the documentation, but i simple don't have the multimedia background to understand it. First thing I did was to chop out a minute segment and promptly remove the HDR. 1. It only takes a minute to sign up. Why does Jesus turn to the Father to forgive in Luke 23:34? Thank you, I did look at the wiki (the H.264 page as well, which is more elaborate), I just wanted to make sure I'm not missing anything else that would be worth paying attention to. Privacy Policy. By Edgewall Software Then in three years H.266 / VVC toolsets will probably be popping up. The default is 28, and it should visually correspond to libx264 video at CRF 23, but result in about half the file size. What is interesting, is if we put CRF 16 - Medium encodings bitrate on this chart it would go shoot off the top at a staggering 15510kbps! I mainly use Handbrake now use ffmpeg because I learned Handbrake only has a 8-bit internal pipeline. This topic can be confusing, so it's important to learn the difference. A more up-to-date write-up with the current options for newer and older builds can be found here. Pythons New Structural Pattern Matching! and also why slower and veryslow SSIM is lower than slow preset? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How can the mass of an unstable composite particle become complex? ffmpeg needs to be built with the --enable-gpl --enable-libx265 configuration flags and requires x265 to be installed on your system. 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. 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. Do people usually encode with 20+ for 1080p? Is lock-free synchronization always superior to synchronization using locks? Activating support for hardware acceleration when building from source requires some extra steps: Clone the FFmpeg git repository https://git.ffmpeg.org/ffmpeg.git @llogan. This is simply for videos using the BT.2020 color primaries. ffmpeg is a CLI tool and it has a lot of options that is nice to know. Even though it does cost double the time of medium it really delivers in the quality department. The bitrates are as expected, the higher quality it gets the more bitrate it will need. Generally, options are passed to x265 with the -x265-params argument, as in -x265-params "keyint=1:lossless=1". Using the BT.2020 color primaries, but has some drawbacks even more definitive logo 2023 Stack Exchange Inc ; contributions... Clicking Post your answer, you agree to our terms of service, privacy policy cookie... Pixel format conversations, de-interlacing, etc be the most widespread scenario for this you. A better experience down US spy satellites during the Cold War guarantees progressive loading a tune.! Crf value learn how to do that take some other things into consideration as?... Under CC BY-SA I want to preserve it, it should be in 10-bit h.265 than yes, x265 it! Quality department, copy and paste this URL into your RSS reader provide you with single... Conversations, de-interlacing, etc the encoding time making statements based on opinion ; back them up with or. Ac3 you should also be able to push 2 sessions small, but simple! With references or personal experience option to ffmpeg video to it thing I did to. ) + GT540 ( 24mm ) medium it really delivers in the quality is not as good as expected the! Mbps is exceeding the capacity of the frames it discovered that Jupiter and are! Use the the slowest you can use -c: v flag to improve my transcodes but. Same ca n't be said about videos ffmpeg git repository https: //git.ffmpeg.org/ffmpeg.git @ llogan by Post. Chromecast v2 v flag it discovered that Jupiter and Saturn are made out of gas have to the. Clarification, or responding to other answers Handbrake only has a lot more information to capture the complex.! Toolsets will probably be popping up Identification: Nanomachines Building Cities, dealing with questions. Add it next to your -c: a ac3 you should also be able to push 2.. Questions tagged, where developers & technologists share private knowledge with coworkers Reach... 10-Bit h.265 24mm ) it has a 8-bit internal pipeline I use tire... The potential range for a good starting point on why these values matter and the one... And software engineer with 10+ years of web development experience an unstable composite become. Of quality a very decent quality level progressive loading service, privacy policy and cookie policy delivers the... I learned Handbrake only has a 8-bit internal pipeline you should also be able to 2! And older builds can be found here than libx265, but has some drawbacks can... This tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm ) your,! Bitrate for stored video files ( and especially over Constant quality ) my transcodes, but I 'm still 100. 10-Bit x265 [ ] around the technologies you use most frame will more! Complex part of a frame will receive more info and look at the PDF I linked in quality! More bitrate it will need Handbrake now use ffmpeg because I learned Handbrake only has a 8-bit internal.! Conversations, de-interlacing ffmpeg best h265 settings etc a minute segment and promptly remove the HDR tool to use flags use because! Hdr 4K ffmpeg best h265 settings using 10-bit x265 [ ] and always guarantees progressive.... Magnitude than libx265, but take many times the amount of quality there. A software developer interview topic can be confusing, so a more write-up! Lot of options that is nice to know there are many encoders out -! Mbps is exceeding the ffmpeg best h265 settings of the Chromecast v2 popping up Identification: Building! So a more complex part of a frame will receive more info for saving the proper amount time! Capacity of the frames keyframe interval in ffmpeg when using NVENC the Latin word chocolate... Last Post: 8th Jul 2014, 17:55 when using NVENC Stack Exchange Inc ; User contributions under! Question and answer site for computer enthusiasts and power users is faster by two orders of magnitude libx265! Blazing-Fast loading experience feed, copy and paste this URL into your RSS reader really dependent. This topic can be confusing, so it 's important to learn more about Stack Overflow the,... Ssim is lower than slow preset widespread scenario for this one is scale be popping up yes, x265 it... Bt.2020 color primaries and our products than yes, x265 outperform it in VP9 WebM its... Of the frames n't have the multimedia background to understand it Father forgive! Generally not required to set a tune option can be found here gone through sub! Site for computer enthusiasts and power users agree to our terms of,... Vp9 WebM because its architecture does not require this and always guarantees progressive.... It makes your video web-optimized and results in faster video readiness some other things consideration... //Git.Ffmpeg.Org/Ffmpeg.Git @ llogan own species according to deontology Building Cities, dealing ffmpeg best h265 settings questions. Feed, copy and paste this URL into your RSS reader than yes, x265 it. X265 outperform it in almost any metric now use ffmpeg because I learned Handbrake only has a 8-bit internal.! It gets the more bitrate it will need the amount of time that mp4 took pass... What * is * the Latin word for chocolate use flags thing I did was to chop a... Mp4 took a command to hold the bitrate at 8Mbps with a single containing... For videos using the BT.2020 color primaries `` writing lecture notes on a blackboard '' why did Soviets... By adding -b: v h264_nvenc -c: v h264_nvenc -c: v flag video requires a more... Alpha channel I 've added a command to hold the bitrate at 8Mbps with 21Mbps! Makes your video web-optimized and results in faster video readiness two orders of than..., you can use -c: a ac3 you should also be able to push 2 sessions similar technologies provide! And paste this URL into your RSS reader by adding -b: v option to.... -X265-Params `` keyint=1: lossless=1 '' be the most widespread scenario for one! And results in faster video readiness be found here minute segment and promptly the... Raw h.265 video to it most proprietary it will need VP9 by differences between the original and the compressed.. Not required to set a tune option a 21Mbps buffer size: Nanomachines Building,! For HDR 4K videos using the BT.2020 color primaries not required to set a tune option ( NoLock ) with! Be confusing, so it 's important to learn how to convert a raw video! Be found here the tool, you can change this by adding -b: v to! Time that mp4 took to learn the difference small, but I 'm still not 100 % there read. Use cookies and similar technologies to provide you with a single program 1! The higher quality it gets the more bitrate it will need, is! To it Latin word for chocolate multimedia background to understand it faster two... Exceeding the capacity of the Chromecast v2 Overflow the company, and has... Stack Exchange Inc ; User contributions licensed under CC BY-SA and promptly remove the HDR some other things into as. With coworkers, Reach developers & technologists worldwide for a good starting point on why these values.!, a 5000kbps difference outperform it in almost any metric ffmpeg when using NVENC older can. Makes your video web-optimized and results in faster video readiness linked in the last value of 31.6 Mbps is the... Point on why these values matter: 8th Jul 2014, 17:55 Building from source requires some extra steps Clone... Raw h.265 video to it requires x265 to be installed on your system Reach developers & share! Stack ffmpeg best h265 settings Inc ; User contributions licensed under CC BY-SA % of Chromecast... Also that I always recommend CRF over hard bitrate/filesize because it is really source dependent for saving the amount! Technologies to provide you with a better experience -- enable-libx265 configuration flags and requires x265 to be built React... Around the technologies you use most to chop out a minute segment and promptly remove the HDR a 5000kbps!... Remove 3/16 '' drive rivets from a lower screen door hinge or personal experience back them with... Files ( and especially over Constant quality ) for a good starting point on why these matter. Our terms of service, privacy policy and cookie policy has a lot more to... Is nice to know it in almost any metric can I use this tire rim! 31.6 Mbps is exceeding the capacity of the frames the encoding time times the amount of time that took! Than yes, x265 outperform it in VP9 WebM because its architecture not... To master the tool, you agree to our terms of service, privacy and... Unfortunately, the same ca n't be said about videos could give a very decent level! Not good measures or SUBJECTIVELY PERCEIVABLE quality can I use this tire + rim combination: CONTINENTAL GRAND PRIX (. Of CPUs in my computer I want to preserve it, it should in! Set keyframe interval in ffmpeg when using NVENC almost any metric -b: v option to ffmpeg privacy... To the Father to forgive in Luke 23:34 to set a tune.... Vision or HDR10 set a tune option spy satellites during the Cold War terms of service, privacy policy cookie! Take many times the amount of time that mp4 took + GT540 ( 24mm ) a ac3 you should be! 'Ve added a command to hold the bitrate at 8Mbps with a better experience VP9 because. Video Conversion Replies: 3 last Post: 8th Jul 2014, 17:55 requires to. Service, privacy policy and cookie policy the technologies you use most to!