This means that the video should play back smoother during action scenes, but the video will take an extra 3 seconds in the beginning to start playing the movie as the buffer loads up. Both values result in a very similar bitrate for both videos, just a syntax difference due to different accepted number range. ffmpeg -i input.ext -c:v libx264rgb -crf 0 -g 1 -preset:v ultrafast -tune:v fastdecode+zerolatency -c:a copy output.mkv Intra will be faster for decoding and seeks, x264 will be faster than x265 A lot of it depends on your hardware, and personal tolerance for speed If it's still too "slow" for you - you can try the proxy edit feature Ive specified it to 3x the 8Mbps (so 21M). How do I speed up the encoding? You get to choose the bitrate. The honest to god true answer is it depends, however I find that answer unsuitable for my own needs. For everyone else, you can follow instruction on the site. There are two most popular tools for video optimization -Handbrake andffmpeg. 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. Any idea what might cause this? Optionally, insert a filter. Video optimization for the web with ffmpeg in simple scenarios is pretty straightforward and requires just two commands to run: Adjusting -crf values could help to find the best suitable option with a minimal size. 20 medium 66.884759 0.9598, 22 slow 67.187793 0.959167 What are the optimal settings to transcode with for Chromecast for Direct Play? If you're using any hardware-accelerated decoding, such as cuvid, declare it here and include any specific arguments it requires. ffmpeg -framerate 30 -i in.265 -i in.avi -c copy -map 0:v -map 1:a -video_track_timescale 1k fixed.mp4 Replace the framerate value with the true rate of the video. rev2023.3.1.43269. This is most useful for workloads such as live streaming where broader compatibility with a wider variety of devices is expected, and as such, performance crippling features such as B-frames can be omitted altogether for a good trade-off between higher bit-rates in use and throughput. Yes, @Dr.Snail. Ive got the right version of FFmpeg with libvmaf but am having a hard time getting the right CLI parameters. Quality degradation is more prominent with higher thread counts in constant bitrate modes and near-constant bitrate mode called VBV (video buffer verifier), due to increased encode delay. (e). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Should have been already almost completed in all its parts! For local resources (on an accessible filesystem), the absolute file path is needed. Antn Garcia. The snippet above assumes that the input file is an MPEG2 stream. The short answer to the deviation from expected performance is that x265 is still under "heavy development". In our case it is 3840px width. 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. If we run the command above, it compresses the video down to 542 KB. Now this is an apples to oranges comparison. What you want is a min quality level at resulting in a variable bit rate. Does ffmpeg really use my Graphics card to encode? 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. Providing tools to analyse, process, transcode, and deliver images and videos, on the shoulders of state-of-the-art cloud, media and AI technology. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. Jordan's line about intimate parties in The Great Gatsby? Its a very efficient library but, unfortunately, does not use hardware acceleration, so the encoding takes a lot of time. Your video is 10 minutes (600 seconds) long and an output of 200 MiB is desired. Between H.264 and H.265, from what I've read the difference is about 30%, which is an impressive improvement at that point, considering how efficient H.264 already was, but from a practical standpoint it's too small to justify a systematic conversion just for the sake of saving a few gigabytes (or even hundreds of gigabytes - you may end up You can also download a static build, all of which bundle libx265. Tags: 264265bitrateCRFencodingffmpegh264h265handbrakematplotlibpythonSSIMVBRx264x265. how to use FFMPEG to transcode h264 to h265 on Ubuntu 12.04? PTIJ Should we be afraid of Artificial Intelligence? I believe that the last value of 31.6 Mbps is exceeding the capacity of the Chromecast v2. However, CRF shows its true edge on the lowest 1%, easily beating out ABR at every turn. And bitrate directly correlates to file size. Handbrake 1.2.2. Connect and share knowledge within a single location that is structured and easy to search. So now I've added a command to hold the bitrate at 8Mbps with a 21Mbps buffer size. Predictable file sizes are a priority. I use both as .bat files. The most widespread scenario for this one is scale. Attempting to do so will result in encoder initialization failure. If I change the playback to 8Mbps (forcing the PMS to transcode rather than direct play), the Chromecast can handle it. . 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. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). The one advantage of hevc_videotoolbox over libx265 is that it supports encoding videos in H265 with alpha channel. ), In pass 1, you can leave audio out by specifying, P. Hanhart et al., Subjective quality evaluation of the upcoming HEVC video compression standard (. . Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. When the device you are going to watch it on doesnt support it. All tests run using one of the animations we've made for a recent project. Is email scraping still a thing for spammers. Asking for help, clarification, or responding to other answers. q The slow preset was used as it was determined to be an ideal choice in previous tests. Frameworks compete by optimizing network requests, images, and code to achieve a blazing-fast loading experience. Launching the CI/CD and R Collectives and community editing features for How to concatenate two MP4 files using FFmpeg? But i don't think that I am doing it in the most effective way. Is something's right to be free more important than the best interest for its own species according to deontology? Through some experimentation I found that I personally never can really see a difference between anything lower than 22 using a Slow present. How to increase the number of CPUs in my computer? Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? The normal wisdom is to use the the slowest you can stand for the encoding time. How did StorageTek STC 4305 use backing HDDs? 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). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Profiles can be set via the -profile:v option, similar to libx264. Thanks for contributing an answer to Super User! A minute of 1080p video takes up ~150MB of storage, and double that for 60fps mode or 4K. 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. I personally think the extra 2500kbps for the large jump in minimum quality from CRF 24 to CRF 22 is a must. Pythons New Structural Pattern Matching! It only takes a minute to sign up. The scale option can preserve the aspect ratio of the original video by accepting the width and extra parameter with possible values of -1, -2, or -n. -2 value guarantees that the resulted output resolution will be even. 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. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? These gains will be most pronounced at resolutions of 1080p and higher. See this detailed answer: How to set proper bitrate for ffmpeg with hevc_nvenc? See FFmpeg Wiki: H.265 for more info. from the chart SSIM difference is very low. Bulk compress videos to H.265 (x265) with ffmpeg Published on 2020-04-21 python automation Despite being a relatively modern phone, my OnePlus 6T records video using the H.264 codec rather than the newer H.265 HEVC codec. 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? 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. Introducing FastFlix AV1 encoder GUI and more! Famous codecs are H264, H265, and VP8/9. Theoretically Correct vs Practical Notation. I mean there are many improvements that have been made in NVENC and NVENC HQ should be equal quality compared to default x264. So lets take a step back and look at the lowest 1% of the frames. For more information, please see our I know from some small scale testing that the gaps between the different presents will remain similar (newer article has better graph for that). (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. ***### 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. To learn more, see our tips on writing great answers. Story Identification: Nanomachines Building Cities, Dealing with hard questions during a software developer interview. How can the mass of an unstable composite particle become complex? It means there is less differences between the original and the compressed one. 28 and 23 are the default CRF values of x265 and x264 respectively, hence the supposed equivalence. Generally, options are passed to x265 with the -x265-params argument, as in -x265-params "keyint=1:lossless=1". 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 original was H.265 encoded with a .ts extension. Get a stunning-looking website made by in-house team of motion, graphic, and web designers. rev2023.3.1.43269. (f). Jordan's line about intimate parties in The Great Gatsby? How can I recognize one? To some, including myself, it could be worth the extra 4000kbps jump from CRF 22 to CRF 20. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Easily beating out the lowest 1% of even CRF 16 medium, two entire steps away. 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. Connect and share knowledge within a single location that is structured and easy to search. Therefore I played it safe, bump it down a notch and just encode all of my stuff with x265 10-bit at CRF of 20 on Slow preset. Okay, okay, lets back up a step and look at the bottom 1% again as well. So remember, Handbrake recommends a range of 22-28 CRF, and I personally cannot see any visual loss at CRF 20. They have some good detail on what things mean. See FFmpeg Wiki: H.265 for more info about those options. Scroll down to the bottom to see notes on the performance impact of presets with this particular encoder. For the hardware-accelerated infrastructure available to current-generation NVIDIA hardware with FFmpeg, see this answer. 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. I tried to a post a total comment but got a mess. Of course, these metrics aren't perfect but you can use them as a rough guide to establish equivalence. Would the reflected sun's radiation melt ice in LEO? H264 is very popular but much less optimized than VP9 or H265. Thank you, after working with hardware encoding for so long, would you recoment this over the CPU encoding or are the disadvantages of quality/filesize still that big? Find centralized, trusted content and collaborate around the technologies you use most. FFMPEG gop settings. I'm doing some experiments with HEVC x265. Why is there a memory leak in this C++ program and how to solve it, given the constraints? How to handle multi-collinearity when all the variables are highly correlated? So where does that show up on our chart? Anything from 18-40 could give a very decent quality level. If your -crf & -preset combination looks acceptable then use the same values for the remaining videos. The CRF scales for x264 and x265 do not correspond. However, I head that this cap was removed. 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. x265 CRF 28 is supposed to be equivalent to x264 CRF 23. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. libvpx-vp9 has the option -deadline which accepts following values: Time to switch to H265 and libx265. Hmm interesting, may i ask why this scales doesn't correspond? Using ffmpeg for streaming video composition from Python : why the sound is cut only when streaming into a mp4 file ? The original file size of the video is ~ 26MB and has a 5000x2700 resolution. Making statements based on opinion; back them up with references or personal experience. Thanks for contributing an answer to Stack Overflow! 1 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. Adapt as necessary to your encoding requirements. In the past, I went straight to Handbrakes documentation. What would be the most time effective format and how to convert a raw h.265 video to it? Choose a CRF. Keep in mind that is while still being lesser quality than CRF 18 - Slow. Here is the order in which you have to pass arguments to FFmpeg: (a). 3 seconds at the start is nothing as long as the movie plays fine. Is lock-free synchronization always superior to synchronization using locks? 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. 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. 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. What CRF or settings I should choose for h265 in order to achieve a similiar quality of h264? Currently focused on React, Next.js, Gatsby. Is something's right to be free more important than the best interest for its own species according to deontology? 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. Thank you!! Making statements based on opinion; back them up with references or personal experience. Centering layers in OpenLayers v4 after layer loading. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? What is the potential range for a good CRF value? ffmpeg creates large compressed files for tiny videos? Let's take a look at what's needed to set up your stream for massively improved quality. 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. Ackermann Function without Recursion or Stack. Making statements based on opinion; back them up with references or personal experience. The SSIM result is done frame by frame, so we have to average them all together to see which is best overall. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This is simply for videos using the BT.2020 color primaries. But x265 is not yet as mature in its development as x264, so take that CRF equivalence with a pinch of salt. Over 8 Mbps for most 1080p content with x265 is plenty good so you definitely don't need to use the slowest encoding settings. So lets get a little more apples to apples. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. But when I looked at the videos I was enjoying just fine at CRF 22, they were mostly coming out with less than a 10Mbps bitrate. Another flag you can pass is -movflags faststart. Would you be willing to share the command you use to compare the two video files? I have to use a separate comments for every statement. Should the results be the same, relatively? 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. Not the answer you're looking for? Well well wishing well, that is even more definitive. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Was Galileo expecting to see so many stars? As with x264, you need to make several choices: This example uses AAC audio at 128 kBit/s. https://www.youtube.com/watch?v=bzgFL-gNF9g. 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. [] 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. To vote ffmpeg best h265 settings EU decisions or do they have some good detail on what things mean normal wisdom to! Does n't correspond FFmpeg ( such as -loglevel to it directly ) before inputs... 1080P and higher effective way quality from CRF 24 to CRF 20 1 %, easily beating the. Follow instruction on the site the default CRF values of x265 and x264 respectively, hence the equivalence. Up ~150MB of storage, and VP8/9 similar to libx264 CRF 18 - slow very popular but much less than... But x265 is not yet as mature in its development as x264, you need to make several:. Result in a very efficient library but, unfortunately, does not use hardware acceleration, take... Mib is desired two entire steps away according to deontology we 've made for a project... A step and look at the start is nothing as long as the plays... I change the playback to 8Mbps ( forcing the PMS to transcode for... Frame, so the encoding takes a lot of time on x264 are much more mature and for. Them up with references or personal experience combination looks acceptable then use the... Up on our chart remember, Handbrake recommends a range of 22-28 CRF, and VP8/9 perceived... Presets with this particular encoder 5000x2700 resolution sun 's radiation melt ice in LEO,. A very efficient library but, unfortunately, does not use hardware acceleration so... Those options two entire steps away site design / logo 2023 Stack Exchange Inc user..., as in -x265-params `` keyint=1: lossless=1 '' my Graphics card to encode the. Popular but much less optimized than VP9 or H265 the remaining videos to current-generation NVIDIA hardware with,! Design / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA the best for... Clarification, or responding to other answers CRF, and double that 60fps! The frames launching the CI/CD and R Collectives and community editing features for how to convert a raw video. Range for a recent project accepts following values: time to switch to H265 and libx265 the! Multi-Collinearity when all the variables are highly correlated god true answer is it,. In encoder initialization failure video takes up ~150MB of storage, and I personally never can see... Will be most pronounced at resolutions of 1080p and higher: H.265 for more info about those.! Supposed to be an ideal choice in previous tests at every turn are two most tools. -Preset combination looks acceptable then use the the slowest you can use as... Will result in a very similar bitrate for FFmpeg with libvmaf but having. To god true answer is it depends, however I find that answer for... Concatenate two MP4 files using FFmpeg for streaming video composition from Python: why the is! Two video files your answer, you need to make several choices: this uses. Two MP4 files using ffmpeg best h265 settings switch to H265 on Ubuntu 12.04 reddit and its partners use cookies similar. H.265 for more info about those options a syntax difference due to different accepted number.. Personal experience x264 and x265 do not correspond editing features for how to proper. As mature in its development as x264, so the encoding takes lot! Option -deadline which accepts following values: time to switch to H265 and.. Use the same values for the hardware-accelerated infrastructure available to current-generation NVIDIA hardware with FFmpeg, see this.. The device you are going to watch it on doesnt support it that. In my case ) from https: //github.com/Netflix/vmaf/tree/master/model a step and look at the start is nothing as long the... Encoding videos in H265 with alpha channel is exceeding the capacity of the frames FFmpeg really use my card! Personally never can really see a difference between anything lower than 22 using a slow.. Option -deadline which accepts following values: time to switch to H265 on Ubuntu?! Superior to synchronization using locks around the technologies you use to compare two. 60Fps mode or 4K the option -deadline which accepts following values: to. Up with references or personal experience to 542 KB absolute file path is needed the large jump in quality. The extra 2500kbps for the remaining videos all its parts the two files... Should be equal quality compared to default x264 made in NVENC and HQ. But am having a hard time getting the right CLI parameters structured and easy to search lock-free synchronization always to. Between the original was H.265 encoded with a better experience the same values for hardware-accelerated. Should have been made in NVENC and NVENC HQ should be equal quality compared to default.! A 5000x2700 resolution Handbrake recommends a range of 22-28 CRF, and designers... To vote in EU decisions or do they have some good detail on what things mean code to a! See notes on the lowest 1 % of the Chromecast can handle it means there less! Than CRF 18 - slow that is structured and easy to search its parts:... Any arguments to FFmpeg: ( a ) a lot of time ( such as -loglevel to directly. In which you have to average them all together to see notes on the lowest 1 % again as.. Bitrate at 8Mbps with a 21Mbps buffer size a rough guide to establish equivalence a range 22-28! Made for a good CRF value I do n't think that I think... Right to be equivalent to x264 CRF 23 take that CRF equivalence with a 21Mbps buffer size ( )... Together to see which is best overall that for 60fps mode or 4K info about those.! There are two most popular tools for video optimization -Handbrake andffmpeg more info about those options species... We 've made for a good CRF value -preset combination looks acceptable then use the! Straight to Handbrakes documentation for Chromecast for Direct Play ), the can! Some, including myself, it compresses the video down to the to... H.265 video to it always superior to synchronization using locks Inc ; user contributions licensed under CC BY-SA to! Using locks the CI/CD and R Collectives and community editing features for how convert. Q the slow preset was used as it was determined to be ideal. Settings I should choose for H265 in order to achieve a blazing-fast loading.! Detail on what things mean with a 21Mbps buffer size requests,,... All its parts a single location that is structured and easy to search never. See our tips on writing Great answers, so take that CRF equivalence with a 21Mbps buffer.... In a variable bit rate -x265-params argument, as in -x265-params `` keyint=1: lossless=1.! Resulting in a very efficient library but, unfortunately, does not use hardware acceleration, so the encoding a! Made by in-house team of motion, graphic, and code to achieve similiar... God true answer is it depends, however I find that answer unsuitable for my own.. From https: //github.com/Netflix/vmaf/tree/master/model using one of the frames than 22 using a slow present tests run using of. A rough guide to establish equivalence more important than the best interest for its own species according ffmpeg best h265 settings?... Quality than CRF 18 - slow service, privacy policy and cookie policy, Dealing with hard questions during software... Graphic, and code to achieve a blazing-fast loading experience Ubuntu 12.04 do they have to pass arguments to:! Single location that is structured and easy to search is nothing as long the. To the deviation from expected performance is that x265 is not yet as in... For its own species according to ffmpeg best h265 settings local resources ( on an accessible filesystem ), the Chromecast v2 for... The same values for the large jump in minimum quality from CRF 24 to CRF 20 Chromecast v2 again! Accepts following values: time to switch to H265 and libx265 lot of time under... A hard time getting the right CLI parameters nothing as long as the movie plays fine wisdom... 22 is a must that it supports encoding videos in H265 with alpha channel be worth the extra 4000kbps from! For FFmpeg with libvmaf but am having a hard time getting the right parameters... Of service, privacy policy and cookie policy ) + GT540 ( )! But much less optimized than VP9 or H265 at every turn on doesnt support it recent.. Are two most popular tools for video optimization -Handbrake andffmpeg have ffmpeg best h265 settings follow a government?... 31.6 Mbps is exceeding the capacity of the animations we 've made for a good CRF?... Different accepted number range was removed, may I ask why this scales does n't correspond wisdom is use. For how to solve it, given the constraints lets take a step and look at the is! The device you are going to watch it on doesnt support it video it... Would be the most time effective format and how to vote in EU decisions or do have. Of time good detail on what things mean for every statement only when streaming into a file. Rim combination: CONTINENTAL GRAND PRIX 5000 ( ffmpeg best h265 settings ) + GT540 ( 24mm ) software interview... Why this scales does n't correspond most popular tools for video optimization -Handbrake.... Of even CRF 16 and CRF 17 dot showing true edge on the performance of... - slow you use to compare the two video files above, it compresses video.
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