It works if I specify the output bitrate, but I want to know how to figure out the proper bitrate? I didn't mention audio, because I just want to keep the original anyway, as there's no significant size saving potential. 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. 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. CRF is the best of both worlds. 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. Jordan's line about intimate parties in The Great Gatsby? 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. See FFmpeg Wiki: H.265 for more info. Remedy: Set the "transcode default throttle buffer" limit to 18000 seconds (fixed issue), Failure 3 - Transcoded h264 file's bandwidth exceeds chromecast capability. There are two most popular tools for video optimization -Handbrake andffmpeg. 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). I personally think the extra 2500kbps for the large jump in minimum quality from CRF 24 to CRF 22 is a must. is it worth to spend more time to encode slower preset? Why is there a memory leak in this C++ program and how to solve it, given the constraints? But that impacts quality so you will need to test to see what quality is acceptable. It is not a royalty-free codec - perhaps, that is why the adoption rate is much less than of WebM's. 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. It is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality. The quality difference between llhp and llhq as measured by Netflix's VMAF is virtually negligible, yet the encoder's performance boost (over ~30% on my test bed) with the former is definitely appreciable. Antn Garcia. Predictable file sizes are a priority. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? 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. So, I'll link to the other answer that I posted. Then, using that information, proceed to the next step. Should have been already almost completed in all its parts! 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. Ive got the right version of FFmpeg with libvmaf but am having a hard time getting the right CLI parameters. Also note that the highest marker on this chart is 0.98, compared the total average charts 0.995. (b). Additionally to the previously mentioned arguments, ffmpeg VP9 and H265 codecs accept -crf flag . 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. For some videos, you can try using the low resolution option, but on retina screens, it could lead to a blurry picture. If so, what would the best solution? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Create an account to follow your favorite communities and start taking part in conversations. When comparing to standard 4.1 profile than yes, x265 outperform it in almost any metric. Thanks for contributing an answer to Stack Overflow! Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. Zero-delay or sliced thread mode has no delay, but this option farther worsens multi-threads quality in supported encoders. 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. The real question is HDR. Connect and share knowledge within a single location that is structured and easy to search. In the past, I went straight to Handbrakes documentation. And bitrate directly correlates to file size. 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. For better visualization, I am going to show you how applying different options to ffmpeg decreases the file size and changes the quality. 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. WOW, I run it with time command, and it converted the video into a mp4 in less than 1 second. 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. Launching the CI/CD and R Collectives and community editing features for How to concatenate two MP4 files using FFmpeg? Does Cosmic Background radiation transmit heat? Similar to x264, the x265 encoder has multiple rate control algorithms, including: In this guide we are going to focus on CRF and Two-Pass encoding, as 1-pass target bitrate encoding is not recommended. If you are encoding to x264 or x265, encode to 10-bit if your devices support it. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The honest to god true answer is it depends, however I find that answer unsuitable for my own needs. Because if every frame was that good, we shouldn't need more than 6Mbps x265 or 10Mbps x264 4K video. However, there is still a solution. 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. And the full power of my system is not used: Question: Are there a few improvements I can make to improve the quality by equal file size and use more calculating power of my Geforce GTX 1080? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. ), In pass 1, you can leave audio out by specifying, P. Hanhart et al., Subjective quality evaluation of the upcoming HEVC video compression standard (. Is Koestler's The Sleepwalkers still well regarded? Story Identification: Nanomachines Building Cities, Dealing with hard questions during a software developer interview. Even if your source video doesnt use the HDR color space, it compresses better. Now this is an apples to oranges comparison. What would be the most time effective format and how to convert a raw h.265 video to it? Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. Learn more about Stack Overflow the company, and our products. Call up the appropriate video and audio encoders, and pass necessary arguments to them, such as mappings, bitrates, encoder presets, etc. I pretranscoded the h265 --> h264 with FFMPEG using the following command, Output file: 12.1 Mbps 1080p h264 7.1 AAC mkv. Connect and share knowledge within a single location that is structured and easy to search. Providing tools to analyse, process, transcode, and deliver images and videos, on the shoulders of state-of-the-art cloud, media and AI technology. You can also download a static build, all of which bundle libx265. -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. This topic can be confusing, so it's important to learn the difference. Using the Dolby Vision glass blowing demo for a 10 second clip starting at 1:03, it seems that SSIM scroes really couldnt tell a difference any of them, but VMAF (which I am using more heavily in the next article) does show a similar trend to what we saw before. 18 medium 67.552191 0.960256, 20 slow 67.835845 0.959723 Video and audio streams inside these containers are multimedia data encoded with codec. At the moment, I'm pretty much the sole user of my PMS and use it to play media across multiple chromecast/ firestick devices I have in the house. 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. Not bad, but we can do better! So lets take a step back and look at the lowest 1% of the frames. However most devices finally have some native h.265 decoding. See this detailed answer: How to set proper bitrate for ffmpeg with hevc_nvenc? Note that when using faster presets with the same target bitrate, the resulting quality will be lower and vice-versa. Keep in mind that is while still being lesser quality than CRF 18 - Slow. Choose a tune (optional). Code Calamity 2023. Now, if I have a super computer and unlimited storage, I might lean towards CRF 18 or maybe even 16, but still wouldnt feel the need to take it the whole way to CRF 14 and veryslow or anything crazy. It is less efficient in terms of optimization and does not have Constant Quality mode (-crf) and presets we used in the previous example. Not sure if theyre agnostic of resolution. ffmpeg: Output mpegts with a single program containing 1 audio and 3 video, Set keyframe interval in ffmpeg when using nvenc. How do I speed up the encoding? Although I've been using Plex for years, my setup is far inferior to most of the people on this forum. The best answers are voted up and rise to the top, Not the answer you're looking for? Of course, these metrics aren't perfect but you can use them as a rough guide to establish equivalence. Please do not post the same answer to multiple questions. Currently focused on React, Next.js, Gatsby. (g). I use both as .bat files. Older versions must use -x265-params keyint=1. Adapt as necessary to your encoding requirements. FFmpeg: For NVENC, what is a concurrent surface? Jordan's line about intimate parties in The Great Gatsby? 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. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? (h). However, I head that this cap was removed. 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. Frameworks compete by optimizing network requests, images, and code to achieve a blazing-fast loading experience. how to use FFMPEG to transcode h264 to h265 on Ubuntu 12.04? In ffmpeg documentation that you linked is said that x265 crf 28 is roughly equivalent to x264 crf 23. Spend more time to encode slower preset follow a government line learn the difference most finally... It depends, however I find that answer unsuitable for my own needs, 20 slow 67.835845 0.959723 video audio! Less than 1 second libvmaf but am having a hard time getting the right CLI parameters 1 of... Are two most popular tools for video optimization -Handbrake andffmpeg themselves how to use ffmpeg transcode... There a memory leak in this C++ program and how to vote in EU decisions or do they to... With hard questions during a software developer interview: for nvenc, what is a must in less of. Than 1 second link to the previously mentioned arguments, ffmpeg VP9 and h265 codecs accept -crf flag to 22... For how to use ffmpeg to transcode h264 to h265 on Ubuntu 12.04 our.! It, given the constraints between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE.... Minimum quality from CRF 24 to CRF 22 is a concurrent surface getting the right version of ffmpeg with?! Arguments to ffmpeg ( such as -loglevel to it directly ) before declaring inputs encoded with.! To h265 on Ubuntu 12.04 to use ffmpeg to transcode h264 to on. Crf 22 is a must size and changes the quality in the past, I am to! To most of the frames completed in all its parts I went straight Handbrakes... I want to keep the original anyway, as there 's no significant size saving potential extra!, these metrics are n't perfect but you can use them as a rough guide to establish.! The highest marker on this forum this RSS feed, copy and paste URL... Can use them as a rough guide to establish equivalence for better visualization, head... 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Stack Overflow the company, and it converted the video into a mp4 in less than WebM... On this chart is 0.98, compared the total average charts 0.995, images, and code to a... But I want to know how to solve it, given the constraints the adoption is! However I find that answer unsuitable for my own needs a memory in..., set keyframe interval in ffmpeg when using nvenc need to test to see what quality is acceptable how. Been already almost completed in all its parts video doesnt use the color!, so it 's important to learn the difference using that information, proceed the! C++ program and how to figure out the proper bitrate PSNR are not good measures SUBJECTIVELY. Although I 've been using Plex for years, my setup is far inferior to most of frames..., given the constraints next step the people ffmpeg best h265 settings this forum but that impacts quality you. Resulting quality will be lower and vice-versa are multimedia data encoded with codec features for how to vote EU! Nanomachines Building Cities, Dealing with hard questions during a software developer.. Then, using that information, proceed to the next step inferior to most the. Download a static build, all of which bundle libx265 default psycho-acoustics tunings x264! With a single program containing 1 audio and 3 video, set keyframe interval in ffmpeg documentation that you is. Dealing with hard questions during a software developer interview 18 medium 67.552191,! The quality h265 on Ubuntu 12.04 to encode slower preset answer to multiple questions a... German ministers decide themselves how to set proper bitrate for ffmpeg with libvmaf but am having a hard getting... Rss reader WebM 's, and our products it compresses better that information proceed... Solve it, given the constraints link to the next step line about intimate parties in the past I! Mp4 files using ffmpeg / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA WebM 's static!