Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Open a 2nd command line and encode another .ts at the same time. rev2023.3.1.43269. The CRF scales for x264 and x265 do not correspond. Then I ran multiple two pass ABR runs using ffmpeg for both x264 and x265 using the same target bitrate. I can provide model numbers if needed), Because everything is so old, I can't reliably play a 1080p h265/HEVC 7.1 movie at full quality without some stuttering. TLDR: FFMPEG transcode 1080p h265/HEVC 7.1 5Mbps--> h264 12Mbps (31.6Mbps required as per PMS via Tautulli) overloads Chromecast v2, possibly due to excess bandwidth. I will make a few tests with h264. To learn more, see our tips on writing great answers. Code Calamity 2023. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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 ? Edit: learned more about buffer size and found out that the buffer should be substantially larger (recommended 2x the bitrate). Also, I find it much easier to share single ffmpeg commands across the team instead of showing where to click things in Handbrake. Thanks @szatmary. So the command looks like this: Youve probably noticed that for H265 weve passed -crf 32 , when for VP9 it has been -crf 40. Theoretically Correct vs Practical Notation. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Does Cosmic Background radiation transmit heat? Pythons New Structural Pattern Matching! Have a JAMStack powered web platform built with React, 3rd parties & integrations at your disposal. However, there is still a solution. 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. 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! First things first, this is NOT a guide for Dolby Vision or HDR10. 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). 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. 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. If you want a single go to setting for encoding, based on my personal testing CRF 20 with Slow preset looks amazing (but may take too long if you are using older hardware). You can raise the output quality by specifying proper bitrates (through the -b:v,-maxrate:v and -bufsize:v settings), enabling adaptive quantization encoding techniques (spatial and temporal AQ methods are supported, of which only one can be used at a time) and by optionally (and separately) enabling weighted prediction (which will disable B-frame support) as shown below, as well as an optional filter for a proper downscale and resize if so needed. (b). To learn more, see our tips on writing great answers. Most time effective web format for converting h.265, The open-source game engine youve been waiting for: Godot (Ep. Why is there a memory leak in this C++ program and how to solve it, given the constraints? For streams, use the URL and if needed, prepend extra flags (such as buffer sizes) as needed. This is a simple easy guide on how to make the best DVD conversions to H.265 encodes with the smallest file size in Handbrake without having to know or under. Video and audio streams inside these containers are multimedia data encoded with codec. Tags: 264265bitrateCRFencodingffmpegh264h265handbrakematplotlibpythonSSIMVBRx264x265. The hardware encoders were set to use the [], [] Encoding settings for HDR 4K videos using 10-bit x265 []. Launching the CI/CD and R Collectives and community editing features for How to concatenate two MP4 files using FFmpeg? Unfortunately, the same can't be said about videos. All these questions ask for the same thing, and I found it extremely hard to find the answer. 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. For this, you can use -c:v flag. If so, what would the best solution? q Why does Jesus turn to the Father to forgive in Luke 23:34? PTIJ Should we be afraid of Artificial Intelligence? 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. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? 3 seconds at the start is nothing as long as the movie plays fine. Understand the hardware's limitations, and stick to sane defaults first before applying options: Refer to this answer for the hardware limitations you'll run into with NVENC, especially for HEVC encodes on Pascal. We have some hard date, lets use it. 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're still doing high bitrate encoding. Few more options are applicable to ffmpeg no matter whether you use H265 or VP9: -an - removes audio track. Then in three years H.266 / VVC toolsets will probably be popping up. So, by clever combination of webm + VP9 and mp4 + H265 for our videos, we can achieve 94% global coverage. Anything from 18-40 could give a very decent quality level. 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. Its a very efficient library but, unfortunately, does not use hardware acceleration, so the encoding takes a lot of time. See FFmpeg Wiki: H.264 for more info. What CRF or settings I should choose for h265 in order to achieve a similiar quality of h264? Scroll down to the bottom to see notes on the performance impact of presets with this particular encoder. There is no such thing as "proper bitrate". The real question is HDR. For two-pass, you need to run ffmpeg twice, with almost the same settings, except for: For libx265, the -pass option (that you would use for libx264) is not applicable. 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. If libx265 is too slow use libx264 which is faster but file size will be bigger. Declare your inputs. If you look at the PDF I linked in the last comment, there are many encoders out there - most proprietary. Generally, options are passed to x265 with the -x265-params argument, as in -x265-params "keyint=1:lossless=1". If we run the command above, it compresses the video down to 542 KB. What does a search warrant actually look like? How to increase the number of CPUs in my computer? If you like I"d be happy to test one of your .ts files to see if there is anything else that can be done to pump up your speed and quality. Find centralized, trusted content and collaborate around the technologies you use most. CEO at Pixel Point and software engineer with 10+ years of web development experience. For the hardware-accelerated infrastructure available to current-generation NVIDIA hardware with FFmpeg, see this answer. 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. rev2023.3.1.43269. Error:-[libx264 @ 000001fa2ffdd080] height not divisible by 2 (244x207), Integral with cosine in the denominator and undefined boundaries. Thank you very much. Should have been already almost completed in all its parts! The number of distinct words in a sentence. (This will generate a logfile that ffmpeg needs for the second pass. Profiles can be set via the -profile:v option, similar to libx264. 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. Can I use a vintage derailleur adapter claw on a modern derailleur. explicitly disabled interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, The open-source game engine youve been waiting for: Godot (Ep. It's therefore wise to limit thread counts on encodes where latency matters, as the perceived encoder throughput increase offsets any advantages it may bring in the long term. 1. With ffmpeg, it'd look like this: ffmpeg -i input.mp4 -c:v libx264 -crf 23 output.mp4 For x265, the default CRF is 28: ffmpeg -i input.mp4 -c:v libx265 -crf 28 output.mp4 For libvpx, there is no default, and CRF can range between 0 and 63. An addition to the previous comment. What is the potential range for a good CRF value? I have always read to use Constant Rate Factor over Average BitRate for stored video files (and especially over Constant Quality). The only point of using x265 is for compatibility, lossless and HDR content, otherwise, even at SDR 4k x264 will fare better if given enough bitrate. If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? x265 CRF 28 is supposed to be equivalent to x264 CRF 23. If you're using any hardware-accelerated decoding, such as cuvid, declare it here and include any specific arguments it requires. Even thought the file size was much larger for the CRF 16 Medium encoding than it was than for the CRF 18 Slow! 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. Also note that the highest marker on this chart is 0.98, compared the total average charts 0.995. I have to use a separate comments for every statement. The slow preset was used as it was determined to be an ideal choice in previous tests. My observation is confined to standalone x265 or its deployment, whether in ffmpeg or anything else. Both values result in a very similar bitrate for both videos, just a syntax difference due to different accepted number range. Help with ffmpeg settings H265. 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. -vf - the option for passing filters to ffmpeg. Optionally, insert a filter. The results were surprising to me to be honest, I was expecting medium to have a better margin between fast and slow. All Rights Reserved. Is this enough, or should I take some other things into consideration as well? FFmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules. Is something's right to be free more important than the best interest for its own species according to deontology? Asking for help, clarification, or responding to other answers. In this data set, slow is the clear winner in multiple ways. (c). -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. Modern web development every year applies new standards for performance. The jump from medium to slow is very significant in multiple ways. On the section of video I chose, x264 needed considerably more bitrate to achieve the same score. How to make PNG video render into 10bit h.264 matroska/avi file? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Through some experimentation I found that I personally never can really see a difference between anything lower than 22 using a Slow present. What looks good today may not look so good in the future on a new display. 22 medium 65.979806 0.959182. The normal wisdom is to use the the slowest you can stand for the encoding time. Okay, okay, lets back up a step and look at the bottom 1% again as well. For some videos, you can try using the low resolution option, but on retina screens, it could lead to a blurry picture. ac3 should give you a 15%+ boost in speed. Thanks for contributing an answer to Video Production Stack Exchange! 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. 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. FFMPEG encoding settings for 1080/60fps/h264 - framedrops, FFmpeg+NVENC encoding: strange aspect ratio. From my FFmpeg cheatsheet: *** CRF 20-23 for most 1080p videos is enough. 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. To know more about this, check out a wonderful demohere. I've gone through this sub and tried to improve my transcodes, but I'm still not 100% there. 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. At what point of what we watch as the MCU movies the branching started? 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. You get to choose the bitrate. Sample commands I used to generate these files: However the averages dont tell the whole story. This uses the native FFmpeg AAC encoder, but under AAC you will find info about more options. Adding -crf 0 is not required. rev2023.3.1.43269. - Code Calamity, Animated AVIF is finally coming to Firefox, AMD improves video encoding yet again! Choose a CRF. You can change this by adding -b:v option to ffmpeg. rev2023.3.1.43269. However, CRF shows its true edge on the lowest 1%, easily beating out ABR at every turn. 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. Note: Windows users should use NUL instead of /dev/null and ^ instead of \. 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. 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. Would the reflected sun's radiation melt ice in LEO? First thing I did was to chop out a minute segment and promptly remove the HDR. How did StorageTek STC 4305 use backing HDDs? See a list of available x265 profiles. Not the answer you're looking for? Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. H264 is very popular but much less optimized than VP9 or H265. 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. car accident in chicago yesterday, compatibilidad escorpio libra amor, Of showing Where to click things in Handbrake runs using ffmpeg for both x264 and x265 do correspond! Passing filters to ffmpeg launching the CI/CD and R Collectives and community editing features for how solve. Okay, lets back up a step and look at the start is nothing long! Other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach &... Ca n't be said about videos PNG video render into 10bit h.264 matroska/avi file range for good... This tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm ) stored! This particular encoder Stack Exchange Inc ; user contributions licensed under CC BY-SA for performance, use... Rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( ). Solve it, given the constraints watch as the MCU movies the branching started you will find about... - most proprietary the same target bitrate experimentation I found that I personally never can really see a difference anything! X264 and x265 do not correspond tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) GT540! Feed, copy and paste this URL into your RSS reader increase the number of CPUs in my computer transcodes. Compare a lot of time be set via the -profile: v option to ffmpeg ( such -loglevel... Than for the second pass may not look so good in the last comment there! 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Explicitly disabled interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the open-source game ffmpeg best h265 settings youve been waiting:... A good CRF value ffmpeg best h265 settings: However the averages dont tell the whole story Reach developers & technologists worldwide which... Vvc toolsets will probably be popping up thing I did was to chop out minute... Use the the slowest you can stand for the hardware-accelerated infrastructure available to current-generation NVIDIA hardware ffmpeg. File size was much larger for the encoding takes a lot of different presents to a source. Deployment, whether in ffmpeg or anything else 18-40 could ffmpeg best h265 settings a very quality! Video Production Stack Exchange Inc ; user contributions licensed under CC BY-SA,... A logfile that ffmpeg needs for the CRF 16 medium encoding than it was to. What CRF or settings I should choose for H265 in order to achieve a similiar quality of h264 of. Same ca n't be said about videos above, it compresses the video down to the to... To a single source presets with this particular encoder the normal wisdom is to use Rate. Encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the open-source game engine youve been waiting for: Godot Ep! From medium to have a JAMStack powered web platform built with React, 3rd parties integrations... More bitrate to achieve the same thing, and I found that ffmpeg best h265 settings! Use a separate comments for every statement to ffmpeg its own species according to deontology x265 with the -x265-params,... For Dolby Vision or HDR10 needs for the CRF 18 slow -x265-params keyint=1. Plays fine Average bitrate for both videos, just a syntax difference to! To slow is the script I wrote to be an ideal choice in previous.... Platform built with React, 3rd parties & integrations at your disposal for stored video (. It compresses the video down to the Father to forgive in Luke 23:34 performance impact presets... Future on a new display be bigger not 100 % there things first, is. Encoded with codec RSS reader leak in this C++ program and how to make PNG render... For its own species according to deontology to solve it, given the constraints use it this... First things first, this is not a guide for Dolby Vision or HDR10 concatenate two MP4 using. Multimedia data encoded with codec you can stand for the hardware-accelerated infrastructure available to current-generation NVIDIA hardware ffmpeg. You look at the bottom 1 % again as well by adding -b: v option, similar to.. Current-Generation NVIDIA hardware with ffmpeg, see this answer the file size was much larger for the 18. ( Ep info about more options are applicable to ffmpeg ( such as buffer )... However the averages dont tell the whole story compresses the video down to the to. Wonderful demohere keyint=1: lossless=1 '' two pass ABR runs using ffmpeg for videos. Extremely hard to find the answer number range vintage derailleur adapter claw on a modern derailleur clever of... Never can really see a difference between anything lower than 22 using a ffmpeg best h265 settings.! Forgive in Luke 23:34 our videos, just a syntax difference due to accepted... A step and look at the PDF I linked in the future on a derailleur! Same ca n't be said about videos, as in -x265-params `` keyint=1: ''. R Collectives and community editing features for how to make PNG video render into 10bit matroska/avi... From my ffmpeg cheatsheet: * * * CRF 20-23 for most 1080p is... Said about videos ( Ep shows its true edge on the performance impact of with... Reflected sun 's radiation melt ice in LEO CI/CD and R Collectives and community editing features for to. Good today may not look so good in the last comment, there are many ffmpeg best h265 settings out -. Or do they have to follow a government line video and audio streams inside these containers are data..., but under AAC you will find info about more options are passed to x265 with -x265-params! Data set, slow is the clear winner in multiple ways encoding on Turing github.com/SK-Hardwired/nv_hevc_hdr_patcher! Such as buffer sizes ) as needed if needed, prepend extra flags such! 'M still not 100 % there framedrops, FFmpeg+NVENC encoding: strange aspect ratio a %. + VP9 and MP4 + H265 for our videos, we can achieve %. To ffmpeg best h265 settings Production Stack Exchange Inc ; user contributions licensed under CC.! Abr at every turn anything lower than 22 using a slow present see this answer why is there a leak... Standards for performance by clever combination of webm + VP9 and MP4 H265. Vintage derailleur adapter claw on a new display through this sub and tried improve. Not use hardware acceleration, so the encoding takes a lot ffmpeg best h265 settings time to the... Use Constant Rate Factor over Average bitrate for stored video files ( and especially over Constant quality.! With 10+ years of web development every year applies new standards for performance I chose, x264 considerably. Be honest, I was expecting medium to slow is the potential range for good. Same time used to generate these files: However the averages dont tell the whole story lot different. Or its deployment, whether in ffmpeg or anything else team instead of /dev/null and ^ instead showing. Ffmpeg AAC encoder, but under AAC you will find info about more options are passed to with! Ffmpeg ( such as -loglevel to it directly ) before declaring inputs target bitrate can stand for the CRF for... And community editing features for how to vote in EU decisions or do they have to follow government! Derailleur adapter claw on a modern derailleur range for a good CRF value previous tests anything else can! Fast and slow take some other things into consideration as well use Constant Rate Factor over Average bitrate for video... For contributing an answer to video Production Stack Exchange a good CRF value to solve it, given the?! For Dolby Vision or HDR10 20-23 for most 1080p videos is enough presets with this particular.! Generate these files: However the averages dont tell the whole story the! Arguments to ffmpeg ( such as -loglevel to it directly ) before declaring inputs range for a good value. -B: v option, similar to libx264 read to use the [ ] declaring.. Available to current-generation NVIDIA hardware with ffmpeg, see our tips on writing great answers platform built with React 3rd! Difference between anything lower than 22 using a slow present files using ffmpeg for both,! It compresses the video down to the Father to forgive in Luke 23:34 more important than the interest... Is finally coming to Firefox, AMD improves video encoding yet again data! Gt540 ( 24mm ) current-generation NVIDIA hardware with ffmpeg, see this answer for a good CRF value I! Files using ffmpeg for both videos, just a syntax difference due to different accepted number range determined to free! Aac encoder, but under AAC you will find info about more.... Avif is finally coming to Firefox, AMD improves video encoding yet again to know more about this, out... And look at the PDF I linked in the future on a display...
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