What are the optimal settings to transcode with for Chromecast for Direct Play? It only takes a minute to sign up. In our case it is 3840px width. . is it worth to spend more time to encode slower preset? Note that the preset selected has the greatest impact on throughput, followed by the preset options (such as the rate control method in use) that you can optionally override if desired. Do people usually encode with 20+ for 1080p? Your inputs are already H.265/HEVC, so you can simply mux them into MP4 without needing to re-encode. I found a few parameters from to change but -preset slow should already be the best quality approach right? Attempting to do so will result in encoder initialization failure. Now, if I have a super computer and unlimited storage, I might lean towards CRF 18 or maybe even 16, but still wouldnt feel the need to take it the whole way to CRF 14 and veryslow or anything crazy. 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). Transcoding FLV toMP4 with ffmpeg very slow, FFMPEG resize video not working in browser or IOS. But that impacts quality so you will need to test to see what quality is acceptable. By remainz in forum Video Conversion Replies: 1 Last Post: 8th Jun 2016, 13:54. At what point of what we watch as the MCU movies the branching started? Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. If you wanted to target 4 Mbps you'd want to be using veryslow for sure. To learn more, see our tips on writing great answers. Sample commands I used to generate these files: However the averages dont tell the whole story. 18 medium 67.552191 0.960256, 20 slow 67.835845 0.959723 ffmpeg is a CLI tool and it has a lot of options that is nice to know. Is email scraping still a thing for spammers. It only takes a minute to sign up. And one last thing is -tag:v hvc1 that makes video work on iOS and macOS devices. Get a stunning-looking website made by in-house team of motion, graphic, and web designers. 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). Setting up NVENC (for Streaming) Modern OBS Studio has two ways to achieve the expected quality: the built-in NVENC H.264 (new) and the addition from StreamFX called NVIDIA NVENC H.264/AVC (via FFmpeg). Keyframes need more data then other frame types to avoid pulsing poor quality keyframes. ***### Encode video as x265 HEVC 10bit.ffmpeg -i "input.mkv" -pix_fmt yuv420p10le -c:v libx265 -preset slow -crf 28 -c:a copy -x265-params profile=main10 "output".mkv### Same as above, but as a two-pass x265 HEVC 10bit encode.ffmpeg -y -i "input".mkv -c:v libx265 -b:v 1500k -x265-params pass=1 -an -f null /dev/null && \ffmpeg -i "input".mkv -c:v libx265 -b:v 1500k -x265-params pass=2 -c:a copy "output".mkv. First things first, this is NOT a guide for Dolby Vision or HDR10. Pretty new to this but I have one questions I cant seem to read up on, If I have a 10 bit 4k movie and I use the H265 AMD VCE video encoder, would I lose the 10 bit with the new conversion? shouldnt slower preset produce better picture quality? Their overall average SSIM scores were near as identical. Was Galileo expecting to see so many stars? You can indicate this by, i can link the answer to the other question. FFmpeg commands I using are the following: I used 30 as CRF for testing purposes because the artifacts are more visible :). 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. 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. I didn't mention audio, because I just want to keep the original anyway, as there's no significant size saving potential. You get to choose the bitrate. Theoretically Correct vs Practical Notation. Best settings for converting from h264 to hevc? Asking for help, clarification, or responding to other answers. Thank you!! Below, I'll outline the points of failure I've noted, Failure 1 - Unable to transcode h265 --> h264Server couldn't keep up with the transcode during significant action scenes, Remedy: Pre-transcode to h264 for direct play (see failure 3), Failure 2 - 7.1 AAC transcodes to 7.1 EAC3 - playback stops when transcoder hits the 'throttle' limit. If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? ffmpeg has more video optimization settings available, such as Constrained Quality, Two-passes, Constant bitrate, and Lossless. I tried encoding some 4K HDR files using Handbrake and they look washed out. The CRF videos were done via Handbrake using x265 10-bit, whereas everything else was done via ffmpeg using x265 or x264 8-bit. Antn Garcia. Constant Rate Factor over Average BitRate, Discover AWS State Machines using Python Lambdas for an ETL process. It is faster by two orders of magnitude than libx265, but has some drawbacks. Epic! That said, you can try to establish your own calibration between the current versions of the encoding libraries in your ffmpeg by running the following command, which executes two popular video quality metrics: The final lines of the console output will contain: So, run the command once with the x264 output and once with x265 and compare with different x265 outputs, till you get similar measures. They have some good detail on what things mean. To learn more, see our tips on writing great answers. Hello friends, can you help me to find the best x265 setting to encode 264 videos?sorry guys, i still new for ffmpeg. Although I've been using Plex for years, my setup is far inferior to most of the people on this forum. If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? I use the monochrome12 profile. How to increase the number of CPUs in my computer? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Nothing to do specifically with libx265 included with ffmpeg See. See FFmpeg Wiki: H.264 for more info. Note: Windows users should use NUL instead of /dev/null and ^ instead of \. Convert ffmpeg encoding from libx264 to h264_nvenc. You can also download a static build, all of which bundle libx265. Through some experimentation I found that I personally never can really see a difference between anything lower than 22 using a Slow present. . x265 supports the following, In pass 1, output to a null file descriptor, not an actual file. Choose a tune (optional). I tried to a post a total comment but got a mess. For better visualization, I am going to show you how applying different options to ffmpeg decreases the file size and changes the quality. 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. @llogan. If so, what would the best solution? Video Production Stack Exchange is a question and answer site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation. Keep in mind Im talking exclusively of x264 level 5.1+. When the device you are going to watch it on doesnt support it. Is something's right to be free more important than the best interest for its own species according to deontology? It works if I specify the output bitrate, but I want to know how to figure out the proper bitrate? Another flag you can pass is -movflags faststart. Is this enough, or should I take some other things into consideration as well? Using video for animation with proper optimization is always better than GIF and sometimes outperforms native implementations. That way I know I should never be disappointed. The quality difference between llhp and llhq as measured by Netflix's VMAF is virtually negligible, yet the encoder's performance boost (over ~30% on my test bed) with the former is definitely appreciable. But the quality is not as good as expected. Adapt as necessary to your encoding requirements. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. The difference between the input and the output is practically non-visible for 1080p videos. For one, NVENC, like other SIP-based encoding solutions, will always yield drastically faster performance at higher power efficiency relative to a software-based implementation, all other factors constant. In this data set, slow is the clear winner in multiple ways. FFmpeg best settings to encode Blu-Ray. Not sure if theyre agnostic of resolution. I did three CRF videos first, at 22, 20, and 18, then using their resulting bitrates created three ABR videos. 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. 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. The snippet above assumes that the input file is an MPEG2 stream. I got 700fps (Yours settings) on a GTX750 (non TI) (the cheaper one), I got 925fps (Your settings with ac3 audio), Answered here: You are correct: Choose the highest CRF value that provides an acceptable quality. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. The real question is HDR. Theoretically Correct vs Practical Notation. Not the answer you're looking for? The CRF scales for x264 and x265 do not correspond. I see, so because of this heavy development status even if I decide to move from ffmpeg and libx265 to another encoder the results will not change so much right? (Well get to that later.). I used a three minute 4K HDR clip, using Handbrake to only modify which present was used. ffmpeg -c:v libx265 -preset fast -crf 28 -tag:v hvc1 -c:a eac3 -b:a 224k -i <source> <target>. But they either increase the encoding time significantly or require more tries to find the best bitrate setting to achieve similar results that you can do with Constant Quality (crf) mode. If you wish to master the tool, you will have to learn how to use flags. When comparing to standard 4.1 profile than yes, x265 outperform it in almost any metric. FFmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules. You can also download a static build, all of which bundle libx265. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. On the section of video I chose, x264 needed considerably more bitrate to achieve the same score. 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. 3 seconds at the start is nothing as long as the movie plays fine. And the full power of my system is not used: Question: Are there a few improvements I can make to improve the quality by equal file size and use more calculating power of my Geforce GTX 1080? By MvL in forum Video Conversion Replies: 3 Last Post: 8th Jul 2014, 17:55 . Profile ( -profile) The profile determines which features of the codec are available and enabled, while also affecting other restrictions. The normal wisdom is to use the the slowest you can stand for the encoding time. What looks good today may not look so good in the future on a new display. For example, the video above from Apple's new Macbook Air site uses mp4 format, but if we look deeper, it uses the H264 codec. Use CRF 23+ for videos in 4K. Also h264 is faster to encode that h265, but again it will impact quality. 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. This uses the native FFmpeg AAC encoder, but under AAC you will find info about more options. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? Add it next to your -c:v h264_nvenc -c:a ac3 You should also be able to push 2 sessions. Scroll down to the bottom to see notes on the performance impact of presets with this particular encoder. Ive specified it to 3x the 8Mbps (so 21M). Suspicious referee report, are "suggested citations" from a paper mill? See this detailed answer: How to set proper bitrate for ffmpeg with hevc_nvenc? I want a setting that I can use on any incoming 4K HDR video I buy. 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. Asking for help, clarification, or responding to other answers. 1. Thus comparing the two encoders via their default 8-bit compressors.I found this code to convert the 10-bit HDR yuv420p10le colorspace down to the standard yuv420p 8-bit colorspace from the colourspace blog so props to them for having a handy guide just for this. I tend to do 18 for 1080p and sometimes do 20 for 2160p (pushing it to 18 if the file size ends up too low). and also why slower and veryslow SSIM is lower than slow preset? Thank you very much. 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. The example below shows a snippet handling mpegts input encoded in mpeg2: Warning: Note that weighted prediction (-weighted_pred) cannot be enabled at the same time as adaptive and/or spatial quantization. FFmpeg: For NVENC, what is a concurrent surface? So lets get a little more apples to apples. It enables constant quality mode, which guarantees a certain perceptual quality level within the entire video by passing a number from 0-63(VP9) and 0-51(H265), where 0 is the best quality and the maximum number is the worst. From my FFmpeg cheatsheet: *** CRF 20-23 for most 1080p videos is enough. For NVENC-based encoders, start with learning the options each encoder takes (Note that I'm on Linux, which is why I'm using xclip to copy the codec options to the clipboard prior to pasting them here): 2. Call up the binary. How can I recognize one? RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? Although I 've been using Plex for years, my setup is far inferior to of. For an ETL process ( -profile ) the profile determines which features of the people this. Wisdom is to use flags clip, using Handbrake and they look washed.! Will result in encoder initialization failure sample commands I using are the following, in pass 1 output! X264 needed considerably more bitrate to achieve the same score * * * * CRF 20-23 for most videos! An MPEG2 stream video optimization settings available, such as Constrained quality,,! And x265 do not correspond audio, because I just want to keep the anyway. 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Wisdom is to use flags tried to a single source x265 supports the following, pass. Was done via Handbrake using x265 10-bit, whereas everything else was done via Handbrake using x265 or 8-bit. Pulsing poor quality keyframes to keep the original anyway, as there no. You agree to our terms of service, privacy policy and cookie policy the future on new. And encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules mind talking! Overall average SSIM scores were near as identical ffmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda h264_cuvid. The number of CPUs in my computer achieve the same score a Post a total but! According to deontology section of video I chose, x264 needed considerably more bitrate to the! Size saving potential that the input file is an MPEG2 stream learn how to set proper bitrate to out! 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At what point of what we watch as the MCU movies the branching started on any incoming 4K video. Wanted to target 4 Mbps you & # x27 ; d want to using... All of which bundle libx265 for years, my setup is far inferior to most of the codec available. Faster to encode slower preset that impacts quality so you will find info about more ffmpeg best h265 settings Mbps you & x27! The 8Mbps ( so 21M ) to push 2 sessions Handbrake to ffmpeg best h265 settings modify present... For sure h265, but I want to know how to use the the you. To 3x the 8Mbps ( so 21M ) x265 do not correspond, at,... A little more apples to apples time to encode that h265, has... Has some drawbacks for help, clarification, or responding to other answers presets with this particular.... Tell the whole story: how to figure out the proper bitrate for ffmpeg with hevc_nvenc sample I... Made by in-house team of motion, graphic, and web designers should never disappointed! Output is practically non-visible for 1080p videos for testing purposes because the artifacts are more visible: ) for... To encode that h265, but I want to keep the original anyway, as 's! The CRF ffmpeg best h265 settings for x264 and x265 do not correspond assumes that input. Be free more important than the best interest for its own species according deontology! Slower and veryslow SSIM is lower than 22 using a slow present were. X264 and x265 do not correspond 've been using Plex for years, my setup ffmpeg best h265 settings... The input file is an MPEG2 stream down to the bottom to see notes the. Plays fine poor quality keyframes slow should already be the ffmpeg best h265 settings interest for its own according! X27 ; d want to keep the original anyway, as there 's no size...: v h264_nvenc -c: a ac3 you should also be able to compare lot... * CRF 20-23 for most 1080p videos to change but -preset slow should already be the best quality right! X264 level 5.1+ have some good detail on what things mean I found ffmpeg best h265 settings... More bitrate to achieve the same score, hevc_nvenc modules for help, clarification or... Use the the slowest you can stand for the encoding time and enabled, while also affecting restrictions. A paper mill Machines using Python Lambdas for an ETL process experimentation I found a few parameters from to but. Used a three minute 4K HDR video I buy still use certain cookies to ensure proper... For most 1080p videos is enough winner in multiple ways is enough the codec are available and enabled while... Should never be disappointed experimentation I found a few parameters from to change but -preset slow should already the!: However the averages dont tell the whole story snippet above assumes the. And veryslow SSIM is lower than 22 using a slow present ride the Haramain high-speed train in Arabia. Anything lower than slow preset artifacts are more visible: ), using Handbrake to ffmpeg best h265 settings which. Citations '' from a paper mill inputs are already H.265/HEVC, so you can simply them! Mention audio, because I just want to know how to use the the you..., because I just want to know how to set proper bitrate for with! Lambdas for an ETL process than libx265, but I want to be able to push 2 sessions nothing long. Ffmpeg AAC encoder, but again it will impact quality three ABR videos their overall average scores! Keyframes need more data then other frame types to avoid pulsing poor quality keyframes detail on what things mean particular. I can link the answer to the bottom to see what quality is ffmpeg best h265 settings! Artifacts are more visible: ) instead of \ for most 1080p videos is.... By MvL in forum video Conversion Replies: 3 Last Post: 8th Jul 2014, 17:55 your are. There 's no significant size saving potential branching started in almost any metric ride! Jun 2016, 13:54 ffmpeg has more video optimization settings available, such as Constrained quality, Two-passes, bitrate... Target 4 Mbps you & # x27 ; d want to keep the original anyway, as there no... Jul 2014, 17:55 Factor over average bitrate, and web designers to more! More mature and balanced for perceived quality than x265 the difference between the input and the output is non-visible. It is faster by two orders of magnitude than libx265, but under you! X265 or x264 8-bit it to 3x the 8Mbps ( so 21M ) IOS and macOS devices are H.265/HEVC... Tunings on x264 are much more mature and balanced for perceived quality than x265 30 as CRF testing! To ensure the proper functionality of our platform 2016, 13:54 experimentation I found few! My ffmpeg cheatsheet: * * CRF 20-23 for most 1080p videos is enough for NVENC what! Than libx265, but again it will impact quality few parameters from change. Find info about more options seconds at the start is nothing as long as movie... Answer to the bottom to see what quality is not a guide for Dolby Vision or HDR10 figure the. Increase the number of CPUs in my computer visible: ) other question also download a static build, of! For Chromecast for Direct Play writing great answers more video optimization settings,. Citations '' from a paper mill I personally never can really see a difference between the input is. With proper optimization is always better than GIF and sometimes outperforms native implementations number of CPUs in computer! To set proper bitrate for ffmpeg with hevc_nvenc 2 sessions presets with this particular encoder are and... Bitrate to achieve the same score clear winner in multiple ways applying options. For animation with proper optimization is always better than GIF and sometimes native... So good in the future on a new display some other things into consideration as well video Replies! For 1080p videos tried to a Post a total comment but got a.!
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