FFmpeg: For NVENC, what is a concurrent surface? shouldnt slower preset produce better picture quality? Those other encoders might be better - I haven't studied that PDF closely. if you don't, the encoder will choose on for you. Cookie Notice Strange that the video playback stops if the transcoder gets too far ahead, reaching its buffer limit, on the audio track only? Easily beating out the lowest 1% of even CRF 16 medium, two entire steps away. So, by clever combination of webm + VP9 and mp4 + H265 for our videos, we can achieve 94% global coverage. 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. Slower = better video quality and compression. How do I avoid objects having flickering edges when I encode a screen recording to mp4 using x264 and ffmpeg? At what point of what we watch as the MCU movies the branching started? You can also download a static build, all of which bundle libx265. This is best explained with an example. 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. However, Im really only dealing with 1080p rips Curious if you have any data on the difference between Medium and Slow settings at 1080p? You can speed up and slow down encoding ruins presets. Dealing with hard questions during a software developer interview. How can I recognize one? There is only one time to not use it. To learn more, see our tips on writing great answers. When you omit this option, ffmpeg uses -crf 32 for VP9 by default. This is why the duplicate flag has been declined. Adding -crf 0 is not required. Centering layers in OpenLayers v4 after layer loading. Zero-delay or sliced thread mode has no delay, but this option farther worsens multi-threads quality in supported encoders. Use the -g 1 option for FFmpeg 4.3 and newer or if you're using a build from the git master branch. If libx265 is too slow use libx264 which is faster but file size will be bigger. hevc_nvenc option information. Yes, @Dr.Snail. I was afraid of lock my server if for some reason too many cameras send files at the same time, and this just simple solve my problem. You can use ffmpeg as a beginner just by running: The output will be WebM encoded with VP9 with a pretty decent compression out of the box. In our case it is 3840px width. In this case, you are using two different encoders, so you get different bitrates. 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. The Compilation Guides show you how to do that. Then, using that information, proceed to the next step. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. Of course, these metrics aren't perfect but you can use them as a rough guide to establish equivalence. How to increase the number of CPUs in my computer? Connect and share knowledge within a single location that is structured and easy to search. https://www.youtube.com/watch?v=bzgFL-gNF9g. Is this the best possible solution, or is there a better way of doing this? Please do not post the same answer to multiple questions. Asking for help, clarification, or responding to other answers. Pythons New Structural Pattern Matching! Most time effective web format for converting h.265, The open-source game engine youve been waiting for: Godot (Ep. Scroll down to the bottom to see notes on the performance impact of presets with this particular encoder. Jordan's line about intimate parties in The Great Gatsby? To some, including myself, it could be worth the extra 4000kbps jump from CRF 22 to CRF 20. Whereas FFmpeg can deduce the required output format of a file depending on the selected extension of the output file, it is recommended to explicitly declare the output format (through the -f option) so that extra options can be passed to the underlying muxer if needed, as is often the case with streaming formats such as HLS, mpegts and DASH. Handbrake 1.2.2. However, I head that this cap was removed. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? I will make a few tests with h264. Now that it is clear, the next important thing to learn is that not every codec is suitable for every video format. How to increase the number of CPUs in my computer? thank you, I'll try it now and feedback you later ^^, I use it to decrease scale. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? FFmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules. Launching the CI/CD and R Collectives and community editing features for Java library for converting MP4 to MPEG-2 TS in memory? 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. All tests run using one of the animations we've made for a recent project. Even if your source video doesnt use the HDR color space, it compresses better. Although I've been using Plex for years, my setup is far inferior to most of the people on this forum. I ran some quick tests this morning with a script I am using for a new version of this article using ffmpeg instead of Handbrake. In ffmpeg documentation that you linked is said that x265 crf 28 is roughly equivalent to x264 crf 23. Do not leave these blank. Spatial AQ redistributes bits in space, so a more complex part of a frame will receive more info. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? 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. Is there a more recent similar source? Ackermann Function without Recursion or Stack. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Call up the binary. 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. Convert ffmpeg encoding from libx264 to h264_nvenc. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For H265, we need to learn some more extra options. 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. 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? As an alternative to -crf its possible to use -b:v, which allows manually defining the bitrate of the video(read more). Should the results be the same, relatively? how to use FFMPEG to transcode h264 to h265 on Ubuntu 12.04? This should work in your command line. However, CRF shows its true edge on the lowest 1%, easily beating out ABR at every turn. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? What are some tools or methods I can purchase to trace a water leak? 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. All Rights Reserved. The best answers are voted up and rise to the top, Not the answer you're looking for? I tried encoding some 4K HDR files using Handbrake and they look washed out. What does a search warrant actually look like? x265 uses CRF 18 by default. Have you seen the h264 & h265 pages? Depends on the encoder, the ffmpeg one I dont think supports 10 bit, but VCEEncC does. Still a vlc bad decoding + libx265 too young? Does Cosmic Background radiation transmit heat? 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? 1. Let's take a look at what's needed to set up your stream for massively improved quality. 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. A few interesting options for us are: libvpx-vp9 - which is used be default when you convert to WebM using VP9 codec, libx265 - for H265 code and mp4 container, hevc_videotoolbox - for H265 with a hardware acceleration. Transcoding FLV toMP4 with ffmpeg very slow, FFMPEG resize video not working in browser or IOS. Put simply, the closer the result is to 1 the better. Constant Rate Factor over Average BitRate, Discover AWS State Machines using Python Lambdas for an ETL process. Use the -x265-params lossless=1 option. For streams, use the URL and if needed, prepend extra flags (such as buffer sizes) as needed. Get a stunning-looking website made by in-house team of motion, graphic, and web designers. 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. Centering layers in OpenLayers v4 after layer loading. 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 ? The number of distinct words in a sentence, Torsion-free virtually free-by-cyclic groups. (Well get to that later.). 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. PTIJ Should we be afraid of Artificial Intelligence? 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). 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 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. Definitely not for archiving. Please read the new article for saving HDR.I have historically been using the older x264 mp4s for my videos, as it just works on everything. 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). Create an account to follow your favorite communities and start taking part in conversations. Can I use a vintage derailleur adapter claw on a modern derailleur. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Frameworks compete by optimizing network requests, images, and code to achieve a blazing-fast loading experience. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. To learn more, see our tips on writing great answers. This is needed for functions such as resize,pixel format conversations, de-interlacing, etc. Note that hevc_nvenc will almost produce larger files than libx265 at a given quality because it not as efficient as an encoder. The CRF scales for x264 and x265 do not correspond. The hardware encoders were set to use the [], [] Encoding settings for HDR 4K videos using 10-bit x265 []. (As a heads up h.265 is the specification, and x265 is encoder for it. But x265 is not yet as mature in its development as x264, so take that CRF equivalence with a pinch of salt. Now this is an apples to oranges comparison. I hope you found this information as useful as I did, if you have any thoughts or feedback please let me know! This uses the native FFmpeg AAC encoder, but under AAC you will find info about more options. 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. Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. 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. 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? Server: MacBook Pro with 2.66GHz i7, 4GB DDR3Connection to router: 5GHz WiFiMonitored with Tautulli (PlexPy), Chromecast v2 --> Onkyo Receiver 7.1 setup --> 1080p Sony Projector, Chromecast v1 --> Yamaha Receiver 5.1 setup --> 1080p TV, Amazon Firestick --> Yamaha Receiver 5.1 setup --> 1080p TV, These are connected over 2.4 GHz, unfortunately, (I know, I'm running some seriously old components in heresome are a decade old. 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 I used a three minute 4K HDR clip, using Handbrake to only modify which present was used. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Note that when using faster presets with the same target bitrate, the resulting quality will be lower and vice-versa. Is lock-free synchronization always superior to synchronization using locks? Try running ffprobe on it ( ffprobe -i filename.ts -show_streams ) to see what the format and colorspace are, for HDR should be: pix_fmt=yuv420p10le color_space=bt2020nc color_transfer=smpte2084 color_primaries=bt2020, (Windows ffmpeg/ffprobe package https://ffmpeg.zeranoe.com/builds/, others https://ffmpeg.org/download.html), Found this incredibly helpful, as Ive recently begun ripping Blurays to x265 instead of x264, particularly when I got my new 12-core Ryzen 3900X. Just copy my settings and youre done!You can view the \"Step By Step\" instructions on The Webernets Website - https://www.thewebernets.com/2021/02/06/quick-easy-best-optimal-settings-for-handbrake-convert-dvd-video-to-h-265-hevc-mac-windows-linux/Lots of interesting information on the H.265 Codec here - https://x265.readthedocs.io/en/3.1/index.html If you have an easily compressible video, it wont bloat the encoded video to meet some arbitrary bitrate. It makes your video web-optimized and results in faster video readiness. Choose the highest CRF value that provides an acceptable quality. 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. They claim that a 4K video coming into their site should optimally be 35~45Mbps when encoded with the older x264 codecs. 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? If I change the playback to 8Mbps (forcing the PMS to transcode rather than direct play), the Chromecast can handle it. 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. 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. We haven't used it in VP9 WebM because its architecture does not require this and always guarantees progressive loading. I tried H.265 10 bit, H.265 12 bit, and H.264 10 bit, and they all ended up looking washed out compared to the original file. Making statements based on opinion; back them up with references or personal experience. Connect and share knowledge within a single location that is structured and easy to search. 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. x265 CRF 28 is supposed to be equivalent to x264 CRF 23. H264 is very popular but much less optimized than VP9 or H265. So lets take a step back and look at the lowest 1% of the frames. Then in three years H.266 / VVC toolsets will probably be popping up. If it doesnt have HDR, the time to encode it doesnt make sense to me as it will take over twice as long vs H.264. Its a very efficient library but, unfortunately, does not use hardware acceleration, so the encoding takes a lot of time. I guess this solves my problem. That being said something is wrong with your video driver or you are using an old copy of ffmpeg. To learn more, see our tips on writing great answers. (d). This is also all evolving, so next year the AV1 tools may be fast and user friendly enough to use that instead of H.265 for encoding. rev2023.3.1.43269. Not the answer you're looking for? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 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. Learn more about Stack Overflow the company, and our products. Could very old employee stock options still be accessible and viable? 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. Acceleration without force in rotational motion? 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. 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. It only takes a minute to sign up. and our What are the best settings for me to use when encoding x265 videos? Antn Garcia. Asking for help, clarification, or responding to other answers. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? But after even a basic compression it cuts down to 1MB. The SSIM result is done frame by frame, so we have to average them all together to see which is best overall. Could the loss of quality be caused by VLC and its experimental support in deconding h265? Reddit and its partners use cookies and similar technologies to provide you with a better experience. PTIJ Should we be afraid of Artificial Intelligence? The results were surprising to me to be honest, I was expecting medium to have a better margin between fast and slow. This time with Pre-Analysis. Is this enough, or should I take some other things into consideration as well? If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? WebM is an open, royalty-free media file format designed for the web. ffmpeg -c:v libx265 -preset fast -crf 28 -tag:v hvc1 -c:a eac3 -b:a 224k -i <source> <target>. For fine-tuning the encoding process, you can therefore pass any option that is listed in the x265 documentation. I have read that previously, Chromecast used to limit playback at 11 Mbps. Theoretically Correct vs Practical Notation. I tried to a post a total comment but got a mess. There is no such thing as "proper bitrate". Attempting to do so will result in encoder initialization failure. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Not bad, but we can do better! 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). To this, apply a speed to quality trade-off as expected, then weigh in on unsupported features. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Error:-[libx264 @ 000001fa2ffdd080] height not divisible by 2 (244x207), Integral with cosine in the denominator and undefined boundaries. 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. It seems like a flaw in the encoder; it performs predictably in every other respect, but it needs (for example) -b:v 4M for a 720p file or -b:v 8M for 1080p. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? In this test, I encoded all videos with ffmpeg using the default presents. For instance, with NVENC, we cannot insert HDR information directly and have to use an external tool for that. ffmpeg has more video optimization settings available, such as Constrained Quality, Two-passes, Constant bitrate, and Lossless. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, How do I convert 10-bit H.265 / HEVC videos to H.264 without quality loss? What's the difference between a power rail and a signal line? Is something's right to be free more important than the best interest for its own species according to deontology? How to make PNG video render into 10bit h.264 matroska/avi file? . The difference between the input and the output is practically non-visible for 1080p videos. I may mix it up myself in this article, dont worry about the letter, just the numbers. 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. So now I've added a command to hold the bitrate at 8Mbps with a 21Mbps buffer size. This topic can be confusing, so it's important to learn the difference. I mainly use Handbrake now use ffmpeg because I learned Handbrake only has a 8-bit internal pipeline. hevc_videotoolbox is a macOS-specific library that gives native hardware acceleration for H265 encoding. The real question is HDR. Does ffmpeg really use my Graphics card to encode? Over 8 Mbps for most 1080p content with x265 is plenty good so you definitely don't need to use the slowest encoding settings. Best settings for converting from h264 to hevc? 18 slow 68.298806 0.96016 But that's probably not what you want. To make your file compatible with Apple "industry standard" H.265 you have to add the following argument -tag:v hvc1. 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. We have some hard date, lets use it. I use both as .bat files. Providing tools to analyse, process, transcode, and deliver images and videos, on the shoulders of state-of-the-art cloud, media and AI technology. However most devices finally have some native h.265 decoding. 31 is recommended for 1080p HD video: ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 31 -b:v 0 output.mkv How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? Ive specified it to 3x the 8Mbps (so 21M). So what *is* the Latin word for chocolate? You get to choose the bitrate. I'm doing some experiments with HEVC x265. A home for professional coders articles, opinions and ideas. 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! As I'm new to this, I tried doing some research and found that mostly it's about choosing the correct CRF and preset, so I am thinking it would be sufficient to write a script which iterates through these, creating samples which I could look at and decide what's the best option for a given (set of) video(s). 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). Would the reflected sun's radiation melt ice in LEO? Profile ( -profile) The profile determines which features of the codec are available and enabled, while also affecting other restrictions.
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