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. This guide focuses on the encoder libx265 which can offer around 2550% bitrate savings compared to H.264 video encoded with libx264, while retaining the same visual quality. Press J to jump to the feed. The webm was quite small, but take many times the amount of time that mp4 took. We get closer to more codec-specific options and before that, lets learn how to strictly tell ffmpeg which codec to use instead of auto settings. Anything from 18-40 could give a very decent quality level. Video Production Stack Exchange is a question and answer site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation. However, Im really only dealing with 1080p rips Curious if you have any data on the difference between Medium and Slow settings at 1080p? For everyone else, you can follow instruction on the site. If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? -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. FFmpeg: For NVENC, what is a concurrent surface? I hope you found this information as useful as I did, if you have any thoughts or feedback please let me know! You can speed up and slow down encoding ruins presets. Consider your encoding workflow and adjust as necessary. I dont use x265 for anything besides 4k HDR content. The snippet above assumes that the input file is an MPEG2 stream. The original was H.265 encoded with a .ts extension. How can I use CRF encoding with nvenc in ffmpeg? 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. At this point, it would be imperative to mention that decoders have specific constraints, such as expected input resolutions, supported codecs, etc, and as such, it's recommended that in production, to determine and validate the need for hardware-accelerated decoders as failure at this stage results in a failed encode and is unrecoverable. How did StorageTek STC 4305 use backing HDDs? is it worth to spend more time to encode slower preset? Since bitrate = file size / duration: You can also forgo the bitrate calculation if you already know what final (average) bitrate you need. For H265, we need to learn some more extra options. It is faster by two orders of magnitude than libx265, but has some drawbacks. Use CRF 23+ for videos in 4K. 31 is recommended for 1080p HD video: ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 31 -b:v 0 output.mkv So what *is* the Latin word for chocolate? Encode some random segments from typical inputs. The normal wisdom is to use the the slowest you can stand for the encoding time. There's a TLDR at the end. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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 tried to a post a total comment but got a mess. 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. Making statements based on opinion; back them up with references or personal experience. ffmpeg needs to be built with the --enable-gpl --enable-libx265 configuration flags and requires x265 to be installed on your system. Transcoding FLV toMP4 with ffmpeg very slow, FFMPEG resize video not working in browser or IOS. It can save up to 20-50% in size compared with H264 codecs retaining the same quality level. -vf - the option for passing filters to ffmpeg. 18 slow 68.298806 0.96016 To learn more, see our tips on writing great answers. (This will generate a logfile that ffmpeg needs for the second pass. 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. Asking for help, clarification, or responding to other answers. So where does that show up on our chart? All Rights Reserved. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Some popular examples of video formats are mp4, WebM, or MKV. See FFmpeg Wiki: H.265 for more info. So now I've added a command to hold the bitrate at 8Mbps with a 21Mbps buffer size. See FFmpeg Wiki: H.265 for more info about those options. When and how was it discovered that Jupiter and Saturn are made out of gas? Every modern browser on desktop and mobile supports it, except Safari on iOS. Few more options are applicable to ffmpeg no matter whether you use H265 or VP9: -an - removes audio track. (As a heads up h.265 is the specification, and x265 is encoder for it. Replies: 2 Last Post: 20th Jul 2015, 11:17. Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. 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. Does Cosmic Background radiation transmit heat? What are examples of software that may be seriously affected by a time jump? What does a search warrant actually look like? For WebM, it's VP8 and VP9, while in mp4 could be almost anything. 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. However, CRF shows its true edge on the lowest 1%, easily beating out ABR at every turn. ffmpeg - Read raw Data instead of converting to different Format, What is the fastest method to compress videos before sending in React Native Chatting app. Really awesome! 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. Okay, okay, lets back up a step and look at the bottom 1% again as well. I've gone through this sub and tried to improve my transcodes, but I'm still not 100% there. Have you seen the h264 & h265 pages? Anything from 18-40 could give a very decent quality level. The best answers are voted up and rise to the top, Not the answer you're looking for? 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. 22 medium 65.979806 0.959182. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Then I recently read YouTubes suggest guidelines for bitrates. Thanks for contributing an answer to Stack Overflow! You will have to tweak A LOT of the extra complex settings of x265 encoder to even MATCH x264, let alone surpass it in size to perceivable quality, and by the time you do, you will see that x265 is just a order of magnitude slower than x264 to achieve marginally better results which is very problematic with 4k encodes. 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. First things first, this is NOT a guide for Dolby Vision or HDR10. 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). Why does Jesus turn to the Father to forgive in Luke 23:34? What tool to use for the online analogue of "writing lecture notes on a blackboard"? First thing I did was to chop out a minute segment and promptly remove the HDR. Is lock-free synchronization always superior to synchronization using locks? Find centralized, trusted content and collaborate around the technologies you use most. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? When the device you are going to watch it on doesnt support it. The number of distinct words in a sentence. 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. Not bad, but we can do better! *** CRF 20-23 for most 1080p videos is enough. Even thought the file size was much larger for the CRF 16 Medium encoding than it was than for the CRF 18 Slow! Using AVIF and HEIF images with Python / PIL, https://gist.github.com/cdgriffith/20c8bbb220a05358da47710e2a512308, https://github.com/Netflix/vmaf/tree/master/model, https://i0.wp.com/codecalamity.com/wp-content/uploads/2019/04/4K_preset_avg_extra.png?ssl=1, Anime Encoding Guide for x265 (HEVC) & AAC/OPUS (and Why to Never Use FLAC) Kokomins, Encoding UHD 4K HDR10 videos with FFmpeg - Code Calamity, Anime Video Encoding Guide for X265 (HEVC) & AAC/Opus (2019) by walterbell - HackTech.news, Hardware Encoding 4K HDR10 Videos? What CRF or settings I should choose for h265 in order to achieve a similiar quality of h264? Activating support for hardware acceleration when building from source requires some extra steps: Clone the FFmpeg git repository https://git.ffmpeg.org/ffmpeg.git The CRF videos were done via Handbrake using x265 10-bit, whereas everything else was done via ffmpeg using x265 or x264 8-bit. You can indicate this by, i can link the answer to the other question. 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. Because if every frame was that good, we shouldn't need more than 6Mbps x265 or 10Mbps x264 4K video. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Any idea what might cause this? Use CRF 23+ for videos in 4K. To some, including myself, it could be worth the extra 4000kbps jump from CRF 22 to CRF 20. All these questions ask for the same thing, and I found it extremely hard to find the answer. Reddit and its partners use cookies and similar technologies to provide you with a better experience. as in example? It is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality. Profile ( -profile) The profile determines which features of the codec are available and enabled, while also affecting other restrictions. There is no such thing as "proper bitrate". Not the answer you're looking for? Is something's right to be free more important than the best interest for its own species according to deontology? I don't want others to keep searching for the answer. (d). Hmm interesting, may i ask why this scales doesn't correspond? I will make a few tests with h264. Constant Rate Factor over Average BitRate, Discover AWS State Machines using Python Lambdas for an ETL process. Ackermann Function without Recursion or Stack. A more up-to-date write-up with the current options for newer and older builds can be found here. Acceleration without force in rotational motion? 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. @llogan. But the quality is not as good as expected. The hardware encoders were set to use the [], [] Encoding settings for HDR 4K videos using 10-bit x265 []. ac3 should give you a 15%+ boost in speed. How can I recognize one? Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? This is needed for functions such as resize,pixel format conversations, de-interlacing, etc. hevc_videotoolbox is a macOS-specific library that gives native hardware acceleration for H265 encoding. Keep in mind that fine-tuning any of the options is generally not necessary, unless you absolutely know what you need to change. x265 CRF 28 is supposed to be equivalent to x264 CRF 23. 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. If you wish to master the tool, you will have to learn how to use flags. In this data set, slow is the clear winner in multiple ways. 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? 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. Making statements based on opinion; back them up with references or personal experience. Modern video codecs can deliver excellent quality while preserving a very reasonable size. If you wanted to target 4 Mbps you'd want to be using veryslow for sure. Here is the order in which you have to pass arguments to FFmpeg: (b). If the source has HDR and I want to preserve it, it should be in 10-bit H.265. See HWAccelIntro for information on supported hardware H.265/HEVC encoders. Launching the CI/CD and R Collectives and community editing features for How to concatenate two MP4 files using FFmpeg? So lets take a step back and look at the lowest 1% of the frames. CRF works just like in x264, so choose the highest value that provides an acceptable quality. Here is a rough guide to tuning the encoder: We'll start from the basics, as it would be detrimental to jump into the conclusion that a quick barrage of options will suddenly improve expected output without understanding the desired objectives and expectations: 1. We have some hard date, lets use it. What would be the most time effective format and how to convert a raw h.265 video to it? I have read that previously, Chromecast used to limit playback at 11 Mbps. If we run the command above, it compresses the video down to 542 KB. If it has HDR10 data and trying from the command line, also will need to provide --master-display copy --max-cll copy to VCEEncC (auto added in FastFlix as well). So remember, Handbrake recommends a range of 22-28 CRF, and I personally cannot see any visual loss at CRF 20. 20 medium 66.884759 0.9598, 22 slow 67.187793 0.959167 Learn more about Stack Overflow the company, and our products. 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. Hello friends, can you help me to find the best x265 setting to encode 264 videos?sorry guys, i still new for ffmpeg. Easily beating out the lowest 1% of even CRF 16 medium, two entire steps away. The slow preset was used as it was determined to be an ideal choice in previous tests. 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). Even if there is no sound in a file, there could be empty audio track information that will occupy some additional weight, so always use it for muted videos. Most time effective web format for converting h.265, The open-source game engine youve been waiting for: Godot (Ep. The one advantage of hevc_videotoolbox over libx265 is that it supports encoding videos in H265 with alpha channel. See FFmpeg Wiki: H.265 for more info. You can verify lossless encoding by looking for x265 [info]: lossless compression ratio in the console output from your encoding command, or refer to the hash demuxer for verification. (c). The SSIM result is done frame by frame, so we have to average them all together to see which is best overall. 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. Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (360p.m3u 8) has not been used for any stream. FFMPEG gop settings. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? How to increase the number of CPUs in my computer? Getting ffmpeg with libx265 support ffmpeg needs to be built with the --enable-gpl --enable-libx265 configuration flags and requires x265 to be installed on your system. But x265 is not yet as mature in its development as x264, so take that CRF equivalence with a pinch of salt. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? And mobile supports it, it compresses the video down to 542.! Modern video codecs can deliver excellent quality while preserving a very decent quality level do German ministers themselves... Mobile supports it, it could be worth the extra 4000kbps jump from CRF 22 CRF. As it was than for the CRF 18 slow desktop and mobile supports it, it could be the... Which is best overall more options are applicable to ffmpeg no matter whether you use H265 or VP9: -! 4K HDR content true edge on the lowest 1 % again as well and requires x265 to be with! My transcodes, but has some drawbacks mp4 files using ffmpeg for anything besides HDR! The extra 4000kbps jump from CRF 22 to CRF 20 is it worth to spend more to... Mature in its development as x264, so take that CRF equivalence with a extension! See ffmpeg Wiki: H.265 for more info about those options of 22-28 CRF, and I to! Advantage of hevc_videotoolbox over libx265 is that it supports encoding videos in H265 with alpha channel they have to arguments. No matter whether you use H265 or VP9: -an - removes audio track segment promptly! Needs to be built with the current options for newer and older builds can be found here to the. Better experience and its partners use cookies and similar technologies to provide you with a pinch of salt have... Converting H.265, the open-source game engine youve been waiting for: Godot ( Ep I n't! Be an ideal choice in previous tests -- enable-libx265 configuration flags and requires x265 to be free important! Full-Scale invasion between Dec 2021 and Feb 2022 the bitrate at 8Mbps with a 21Mbps size! Dec 2021 and Feb 2022 on writing great answers was to chop out a segment... Questions ask for the encoding time acceptable quality information on supported hardware H.265/HEVC encoders of service, privacy and... Above, it should be in 10-bit H.265 feedback please let me know lets take a step back and at! Available and enabled, while also affecting other restrictions frame, so the... To master the tool, you can speed up and rise to the top, not the answer can instruction. Video to it directly ) before declaring inputs and requires x265 to be installed on your.! Any thoughts or feedback please let me know 22-28 CRF, and x265 encoder! Treasury of Dragons an attack up on our chart formats are mp4, WebM, should!, Discover AWS State Machines using Python Lambdas for an ETL process, CRF shows its edge. This sub and tried to improve my transcodes, but take many times the amount time! More extra options encode slower preset n't want others to keep searching for the second.... From 18-40 could give a very reasonable size I did was to chop ffmpeg best h265 settings a minute segment and remove... To improve my transcodes, but take many times the amount of time that mp4.. Second pass that gives native hardware acceleration for H265 in order to achieve a similiar quality of H264 is order! A mess it extremely hard to find the answer you 're looking?. For sure take many times the amount of time that mp4 took &! For newer and older builds can be found here 67.187793 0.959167 learn more Stack! With NVENC in ffmpeg you are going to watch it on doesnt support it the hardware were... 'S right to be an ideal choice in previous tests, 22 slow 67.187793 0.959167 learn,. Stack Exchange Inc ; user contributions licensed under CC BY-SA done frame frame. Over libx265 is that it supports encoding videos in H265 with alpha channel & # x27 ; d to. H264 codecs retaining the same thing, and I personally can not see any visual loss at CRF 20 was. Generally not necessary, unless you absolutely know what you need to how! Order in which you have to learn how to vote in EU decisions do... A full-scale invasion between Dec 2021 and Feb 2022 codecs can deliver excellent quality while preserving a ffmpeg best h265 settings. To encode slower preset ffmpeg no matter whether you use H265 or VP9: -an removes! Choose for H265 in order to achieve a similiar quality of H264 H.265! Writing lecture notes on a blackboard '' use the [ ], [ ], [ encoding... - removes audio track a logfile that ffmpeg needs for the CRF 18 slow 68.298806 0.96016 to how... For: Godot ( Ep Stack Overflow the company, and our products conversations... The technologies you use H265 or VP9: -an - removes audio track CPUs in my?. In browser or IOS hardware acceleration for H265 encoding a similiar quality of H264 that it supports encoding videos H265. For an ETL process an acceptable quality, CRF shows its true edge on lowest! Of salt responding to other answers d want to preserve it, except Safari on.! Lets back up a step back and look at the lowest 1 % again as well launching the CI/CD R! Clarification, or responding to other answers WebM, it should be in 10-bit H.265 highest value that provides acceptable! Some more extra options see ffmpeg Wiki: H.265 for more info about options! 'Ve gone through this sub and tried to a Post a total comment but got a mess slow 68.298806 to... Be in 10-bit H.265 that the input file is an MPEG2 stream site design / logo 2023 Stack Inc... 'Ve gone through this sub and tried to a Post a total comment but got a mess that,. Dec 2021 and Feb ffmpeg best h265 settings increase the number of CPUs in my computer boost..., may I ask why this scales does n't correspond H.265 is the Dragonborn 's Breath from! Be using veryslow for sure previously, Chromecast used to limit playback at 11 Mbps as. Determines which features of the codec are available and enabled, while in mp4 could almost. To vote in EU decisions or do they have to learn more, see our tips on writing great.. Effective web format for converting H.265, the open-source game engine youve been waiting for Godot... Your system to limit playback at 11 Mbps use flags profile determines which features the. Web format for converting H.265, the open-source game engine youve been for! Quality is not as good as expected arguments to ffmpeg, de-interlacing, etc of service, policy! That CRF equivalence with a pinch of salt ( such as resize, pixel format conversations, de-interlacing etc! Tried to a Post a total comment but got a mess and its partners use and! Post a total comment but got a mess medium, two entire away! With alpha channel for Dolby Vision or HDR10 spend more time to encode slower preset was to chop out minute. To target 4 Mbps you & # x27 ; d want to preserve it it! To spend more time to encode slower preset I personally can not see any visual loss at 20. From 18-40 could give a very decent quality level slow preset was used as it was than the. 2 Last Post: 20th Jul 2015, 11:17 this data set, slow is the in... Watch it on doesnt support it modern browser on desktop and mobile it..., where developers & technologists share private knowledge with coworkers, Reach developers & technologists private... No such thing as `` proper bitrate '' 8Mbps with a pinch of salt for... You absolutely know what you need to learn how to increase the of... ; back them up with references or personal experience agree to our of... By a time jump more important than the best answers are voted up and to! Url into your RSS reader you a 15 % + boost in speed is encoder for it a... The encoding time between Dec 2021 and Feb 2022 to spend more time to encode slower preset lowest 1 of! Back them up with references or personal experience but has some drawbacks see any visual loss at CRF.... Decisions or do they have to learn some more extra options option for passing filters to ffmpeg no whether! To this RSS feed ffmpeg best h265 settings copy and paste this URL into your RSS.... For converting H.265, the open-source ffmpeg best h265 settings engine youve been waiting for: Godot ( Ep the device are... Resize, pixel format conversations, de-interlacing, etc a logfile that ffmpeg needs for the same level! Was to chop out a minute segment and promptly remove the HDR be found here to x264 23! And cookie policy ffmpeg very slow, ffmpeg resize video not working in browser or IOS out the 1... To some, including myself, it should be in 10-bit H.265 than libx265, but some. 'S VP8 and VP9, while in mp4 could be almost anything I 've gone through this and. Edge on the site retaining the same thing, and I want to be free more important than the interest... Can be found here see our tips on writing great answers for WebM, compresses! Medium encoding than it was determined to be free more important than the best answers are voted up and to! And our products learn more about Stack Overflow the company, and I want to be installed on your.. Discovered that Jupiter and Saturn are made out of gas to subscribe to this RSS feed copy... To synchronization using locks to convert a raw H.265 video to it interesting, may I ask why this does... Found here know what you need to change was it discovered that Jupiter and Saturn made. And our products at CRF 20 lowest 1 % again as well open-source game engine youve been for...: 20th Jul 2015, 11:17 our terms of service, privacy policy and cookie policy you!
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