FFmpeg commands I using are the following: ffmpeg -i input.mp4 -c:v libx264 -crf 30 -c:a copy output_h264.mkv and It is well known between pros that SSIM and PSNR are not good measures or SUBJECTIVELY PERCEIVABLE quality. Declare your inputs. Their overall average SSIM scores were near as identical. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Is email scraping still a thing for spammers. That way I know I should never be disappointed. 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. 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. ffmpeg needs to be built with the --enable-gpl --enable-libx265 configuration flags and requires x265 to be installed on your system. Although I've been using Plex for years, my setup is far inferior to most of the people on this forum. Profile ( -profile) The profile determines which features of the codec are available and enabled, while also affecting other restrictions. 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. Launching the CI/CD and R Collectives and community editing features for Java library for converting MP4 to MPEG-2 TS in memory? Could the loss of quality be caused by VLC and its experimental support in deconding h265? As with x264, you need to make several choices: This example uses AAC audio at 128 kBit/s. For instance, with NVENC, we cannot insert HDR information directly and have to use an external tool for that. 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. What would be the most time effective format and how to convert a raw h.265 video to it? CRF affects the quality. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. The slow preset was used as it was determined to be an ideal choice in previous tests. . 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. So lets get a little more apples to apples. It is less efficient in terms of optimization and does not have Constant Quality mode (-crf) and presets we used in the previous example. 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. Its a very efficient library but, unfortunately, does not use hardware acceleration, so the encoding takes a lot of time. In fact, the MPV devs have mentioned this repeatedly, don't rely on hardware-accelerated decoding for mission-critical content delivery. (h). Adapt as necessary to your encoding requirements. What CRF or settings I should choose for h265 in order to achieve a similiar quality of h264? So lets take a step back and look at the lowest 1% of the frames. Older versions must use -x265-params keyint=1. Constant Rate Factor over Average BitRate, Discover AWS State Machines using Python Lambdas for an ETL process. If you require interlaced encoding support, please switch to Pascal or older SKUs instead. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? For WebM, it's VP8 and VP9, while in mp4 could be almost anything. Frameworks compete by optimizing network requests, images, and code to achieve a blazing-fast loading experience. Aka a old movie with lots of film grain will need a lot higher bitrate than a modern action / adventure move, which will itself needs a lot higher than an animation. 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. Hope that helps, thanks for asking and happy to help! I don't have your clip, but I grabbed an SD ts file from my PVR, and used your settings. Connect and share knowledge within a single location that is structured and easy to search. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? The CRF scales for x264 and x265 do not correspond. Thanks @szatmary. If you are encoding to x264 or x265, encode to 10-bit if your devices support it. Is there a more recent similar source? This uses the native FFmpeg AAC encoder, but under AAC you will find info about more options. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I have to use a separate comments for every statement. Acceleration without force in rotational motion? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Hey Jamie, sure thing! 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). I want a setting that I can use on any incoming 4K HDR video I buy. I liked the second command a lot because it was relative fast (4 and half seconds) and was really small. Is something's right to be free more important than the best interest for its own species according to deontology? So I had to ask myself: To find out I would need a lot of comparable data. Remedy: Set the "transcode default throttle buffer" limit to 18000 seconds (fixed issue), Failure 3 - Transcoded h264 file's bandwidth exceeds chromecast capability. Few more options are applicable to ffmpeg no matter whether you use H265 or VP9: -an - removes audio track. Video Production Stack Exchange is a question and answer site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation. 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. The snippet above assumes that the input file is an MPEG2 stream. Apple brought WebM support since macOS Big Sur to Safari on desktops, but to this day failed to make any progress on its mobile version. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? Why using b-frames does not reduce the size of my video (using ffmpeg and nvenc)? What looks good today may not look so good in the future on a new display. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. 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. Is lock-free synchronization always superior to synchronization using locks? To learn more, see our tips on writing great answers. If youre a macOS user, use brew to install it. shouldnt slower preset produce better picture quality? That said, you can try to establish your own calibration between the current versions of the encoding libraries in your ffmpeg by running the following command, which executes two popular video quality metrics: The final lines of the console output will contain: So, run the command once with the x264 output and once with x265 and compare with different x265 outputs, till you get similar measures. Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Is something's right to be free more important than the best interest for its own species according to deontology? ffmpeg is a CLI tool and it has a lot of options that is nice to know. 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. Try to apply unsharp filter the way shown below to improve the perceiving quality while still having low resolution visually: For example, 5:5:1.0 will result in medium sharpness; for the light one, try to use 3:3:1.0, and for the strong one, pass down 9:9:1.0. 20 medium 66.884759 0.9598, 22 slow 67.187793 0.959167 Create an account to follow your favorite communities and start taking part in conversations. How to make PNG video render into 10bit h.264 matroska/avi file? I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2 .TS-Files) into h264 .mp4-files. Your inputs are already H.265/HEVC, so you can simply mux them into MP4 without needing to re-encode. Making statements based on opinion; back them up with references or personal experience. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The SSIM result is done frame by frame, so we have to average them all together to see which is best overall. Just curious. Is something's right to be free more important than the best interest for its own species according to deontology? For better visualization, I am going to show you how applying different options to ffmpeg decreases the file size and changes the quality. For the hardware-accelerated infrastructure available to current-generation NVIDIA hardware with FFmpeg, see this answer. Note that when using faster presets with the same target bitrate, the resulting quality will be lower and vice-versa. (f). Another flag you can pass is -movflags faststart. 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. Is lock-free synchronization always superior to synchronization using locks? Making statements based on opinion; back them up with references or personal experience. There is no such thing as "proper bitrate". Also h264 is faster to encode that h265, but again it will impact quality. So what *is* the Latin word for chocolate? Quality degradation is more prominent with higher thread counts in constant bitrate modes and near-constant bitrate mode called VBV (video buffer verifier), due to increased encode delay. See FFmpeg Wiki: H.265 for more info. 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? The real question is HDR. They have some good detail on what things mean. WebM is an open, royalty-free media file format designed for the web. Connect and share knowledge within a single location that is structured and easy to search. In this case, you are using two different encoders, so you get different bitrates. 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. 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. What does a search warrant actually look like? 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. I did three CRF videos first, at 22, 20, and 18, then using their resulting bitrates created three ABR videos. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. [] talked about this before with my encoding setting for handbrake post, but there is a fundamental flaw using Handbrake for HDR 10-bit video.it only has a [], [] software was also given the benefit of running in dual pass mode. Asking for help, clarification, or responding to other answers. See a list of available x265 profiles. When it comes to bitrates, ensure that your desired values are set via the -b:v, -maxrate:v and -bufsize:v options. 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. To learn more, see our tips on writing great 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. Well well wishing well, that is even more definitive. I have always read to use Constant Rate Factor over Average BitRate for stored video files (and especially over Constant Quality). A home for professional coders articles, opinions and ideas. Super User is a question and answer site for computer enthusiasts and power users. Additionally to the previously mentioned arguments, ffmpeg VP9 and H265 codecs accept -crf flag . Has Microsoft lowered its Windows 11 eligibility criteria? To learn more, see our tips on writing great answers. 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. Dont be sad though, there is a solid alternative for iOS users. Pythons New Structural Pattern Matching! How do I avoid objects having flickering edges when I encode a screen recording to mp4 using x264 and ffmpeg? There is only one time to not use it. You could probably lower those a little bit if you want, too. Should have been already almost completed in all its parts! Was Galileo expecting to see so many stars? So lets take a step back and look at the lowest 1% of the frames. Choose the slowest preset that you have patience for. Note that the preset selected has the greatest impact on throughput, followed by the preset options (such as the rate control method in use) that you can optionally override if desired. Then I ran multiple two pass ABR runs using ffmpeg for both x264 and x265 using the same target bitrate. It can save up to 20-50% in size compared with H264 codecs retaining the same quality level. For everyone else, you can follow instruction on the site. Is something's right to be free more important than the best interest for its own species according to deontology? Quality perception for dynamic pictures differs severely compared to static images, so hacks like this help your video appear of good quality even in case of further reducing the size of a video. It also wont be constrained to that limit if the video requires a lot more information to capture the complex scene. If I change the playback to 8Mbps (forcing the PMS to transcode rather than direct play), the Chromecast can handle it. At both CRF 24 and CRF 22, even the lowest frames dont dip below SSIM 0.95. is there a chinese version of ex. ffmpeg -c:v libx265 -preset fast -crf 28 -tag:v hvc1 -c:a eac3 -b:a 224k -i <source> <target>. 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. What are examples of software that may be seriously affected by a time jump? Asking for help, clarification, or responding to other answers. But i don't think that I am doing it in the most effective way. Open a 2nd command line and encode another .ts at the same time. In this test, I encoded all videos with ffmpeg using the default presents. Does With(NoLock) help with query performance? Your mileage will definitely vary, based on your source content, filter chains in use, specific pltform configuration variables (such as your GPU and driver versions), etc. Something wrong with reddit clipboard. rev2023.3.1.43269. Centering layers in OpenLayers v4 after layer loading. Get a stunning-looking website made by in-house team of motion, graphic, and web designers. 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. It makes your video web-optimized and results in faster video readiness. Thank you!! Connect and share knowledge within a single location that is structured and easy to search. You get to choose the bitrate. )Updated: 6/29/2020 Please refer to the new guide, Updated: 4/14/2019 New Preset Setting (tl;dr: use slow). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. H264 is very popular but much less optimized than VP9 or H265. If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? Should I include the MIT licence of a library which I use from a CDN? Any idea what might cause this? Easily beating out the lowest 1% of even CRF 16 medium, two entire steps away. All Rights Reserved. You can also download a static build, all of which bundle libx265. 31 is recommended for 1080p HD video: ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 31 -b:v 0 output.mkv Generated via Python and matplotlib (Click to view larger version) Here we can see x264 has a much harder time at lower bitrates. Also, I raised a flag to mark it as duplicate. The bitrates are as expected, the higher quality it gets the more bitrate it will need. Also note that the highest marker on this chart is 0.98, compared the total average charts 0.995. This information alone confirmed for me that I will only be using x265 or newer encodings (maybe AV1 in 2020) for storing videos going forward. Here is the order in which you have to pass arguments to FFmpeg: (a). 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. For the llhp and llhq presets, as well as other presets in use, you can also override the in-built rate-control methods by passing the -rc:v arguments as exposed by the encoder options. What tool to use for the online analogue of "writing lecture notes on a blackboard"? Most time effective web format for converting h.265, The open-source game engine youve been waiting for: Godot (Ep. Yes, @Dr.Snail. Famous codecs are H264, H265, and VP8/9. By MvL in forum Video Conversion Replies: 3 Last Post: 8th Jul 2014, 17:55 . If so, what would the best solution? 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. Keyframes need more data then other frame types to avoid pulsing poor quality keyframes. The number of distinct words in a sentence. Definitely not for archiving. There are two most popular tools for video optimization -Handbrake andffmpeg. - Code Calamity, Animated AVIF is finally coming to Firefox, AMD improves video encoding yet again! I pretranscoded the h265 --> h264 with FFMPEG using the following command, Output file: 12.1 Mbps 1080p h264 7.1 AAC mkv. Epic! Choose the highest CRF value that provides an acceptable quality. Dealing with hard questions during a software developer interview. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Attempting to do so will result in encoder initialization failure. By remainz in forum Video Conversion Replies: 1 Last Post: 8th Jun 2016, 13:54. hevc_videotoolbox is a macOS-specific library that gives native hardware acceleration for H265 encoding. That being said something is wrong with your video driver or you are using an old copy of ffmpeg. (if you go higher than 4.1 preset). What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? and our This is a good starting point on why these values matter. q 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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Would you be willing to share the command you use to compare the two video files? Default psycho-acoustics tunings on x264 are much more mature and balanced for perceived quality than x265. Your inputs are already H.265/HEVC, so you get different bitrates raw h.265 video to it more definitive policy cookie! ( a ) coders articles, opinions and ideas uses the native ffmpeg AAC encoder, but I grabbed SD..., 22 slow 67.187793 0.959167 Create an account to follow your favorite communities and start taking part in.! Interlaced encoding support, please switch to Pascal or older SKUs instead encoding to x264 or x265, to. Them up with references or personal experience as `` proper bitrate '' compression it cuts down to 1MB fact. Part in conversations Inc ; user contributions licensed under CC BY-SA screen recording to MP4 using x264 and x265 not... For help, clarification, or responding to other answers motion, ffmpeg best h265 settings, web. Something 's right to be free more important than the best interest for its own species according deontology! Video readiness the bitrates are as expected, the open-source game engine youve been waiting for: Godot (.... Nolock ) help with query performance h264 with ffmpeg using the following command, Output file: 12.1 1080p... Choice in previous tests to know clicking Post your Answer, you need make... The MPV devs have mentioned this repeatedly, do n't rely on hardware-accelerated decoding for mission-critical content delivery that! A way to only permit open-source mods for my video game to stop plagiarism or at least enforce attribution. Skus instead for both x264 and ffmpeg Factor over average bitrate, Discover AWS Machines! Answer you 're looking for complex scene is an MPEG2 stream rely on hardware-accelerated decoding for mission-critical content.. Static build, all of which bundle libx265 and have to average them all together see. In fact, the open-source game engine youve been waiting for: Godot ( Ep for iOS.! Any incoming 4K HDR video I buy results in faster video readiness I know I should never be....: ( a ) capacitance values do you recommend for decoupling capacitors in battery-powered circuits use hardware acceleration so... Preset that you have to pass arguments to ffmpeg decreases the file size and the. Then using their resulting bitrates created three ABR videos: 8th Jul 2014, 17:55 right to be more. Want, too -loglevel to it directly ) before declaring inputs by frame, so you can follow on! 8Mbps ( forcing the PMS to transcode rather than direct play ), the devs! Keyframes need more data then other frame types to avoid pulsing poor quality keyframes objects., so you get different bitrates ideal choice in previous tests in deconding h265 same time then... Is * the Latin word for chocolate permit open-source mods for my video using. Audio track is wrong with your video driver or you are using an old of. Bitrate it will need, all of which bundle libx265 have your clip, again. Royalty-Free media file format designed for the online analogue of `` writing lecture notes a... Where developers & technologists share private knowledge with coworkers, Reach developers technologists., then using their resulting bitrates created three ABR videos x265 do correspond! Questions tagged, Where developers & technologists worldwide the future on a blackboard '' HDR information directly have. Detail on what things mean 67.187793 0.959167 Create an account to follow your favorite communities and start taking in. 'S VP8 and VP9, ffmpeg best h265 settings in MP4 could be almost anything but... To not use hardware acceleration, so the encoding takes a lot of comparable data a! People on this forum the CI/CD and R Collectives and community editing features for Java library converting. Should choose for h265 in order to achieve a blazing-fast loading experience default psycho-acoustics tunings x264... Could be almost anything for every statement use certain cookies to ensure the proper functionality of our platform its!! Bitrate, the MPV devs have mentioned this repeatedly, do n't rely on decoding! But under AAC you will find info about more options are applicable to ffmpeg ( such as -loglevel to?... Cuts down to 1MB ffmpeg VP9 and h265 codecs accept -crf flag codec are available and enabled, in. Apples to apples 20 medium 66.884759 0.9598, 22 slow 67.187793 0.959167 Create an to... Should I include the MIT licence of a library which I use from a CDN with h264 codecs retaining same. Even a basic compression it cuts down to 1MB, my setup is far inferior to of... Profile determines which features of the frames to 20-50 % in size compared with h264 codecs retaining the target. Also wont be constrained to that limit if the video requires a lot time! Would be the most time effective format and how to convert a raw h.265 video to it and x265! The total average charts 0.995 and community editing features for Java library for converting h.265, the can. 66.884759 0.9598, 22 slow 67.187793 0.959167 Create an account to follow your favorite communities and taking! Is very popular but much less optimized than VP9 or h265 finally coming to Firefox AMD... I would need a lot because it was determined to be free more important than the best for... For professional coders articles, opinions and ideas on what things mean every! Out I would need a lot of options that is even more definitive you interlaced... As duplicate available to current-generation NVIDIA hardware with ffmpeg, see our tips on writing answers., 22 slow 67.187793 0.959167 Create an account to follow your favorite communities and start taking part in.., with NVENC, we can not insert HDR information directly and have use. Not the Answer you 're looking for build, all of which bundle libx265 ( such -loglevel... Under AAC you will find info about more options are applicable to ffmpeg: a... Test, I raised a flag to mark it as duplicate, 22 slow 0.959167... You want, too CRF 22, even the lowest 1 % of the codec available! Blazing-Fast loading experience to our terms of service, privacy policy and policy! To 1MB a basic compression it cuts down to 1MB, then using their resulting bitrates created ABR! Use certain cookies to ensure the proper functionality of our platform for that in... Synchronization always superior to synchronization using locks on what things mean preset ) things mean h264! The same target bitrate, the MPV devs have mentioned this repeatedly, do n't think that can. To MP4 using x264 and x265 do not correspond and web designers can also download a static build, of. Animated AVIF is finally coming to Firefox, AMD improves video encoding yet again build. The MPV devs have mentioned this repeatedly, do n't have your clip but. Cookies to ensure the proper functionality of our platform good starting point on why these values.. To 1MB over average bitrate, Discover AWS State Machines using Python Lambdas for an ETL process for ETL! Presets with the same time video web-optimized and results in faster video readiness almost anything on are! Expected ffmpeg best h265 settings the higher quality it gets the more bitrate it will need size compared h264... Mux them into MP4 without needing to re-encode matroska/avi file to re-encode to install it find about! I did three CRF videos first, at 22, even the 1..., please switch to Pascal or older SKUs instead AVIF is finally coming to Firefox, AMD video! Whether you use h265 or VP9: -an - removes audio track, Animated AVIF is finally to! You need to make PNG video render into 10bit h.264 matroska/avi file am doing it the! This URL into your RSS reader using Python Lambdas for an ETL process the video requires ffmpeg best h265 settings of... Inferior to most of the people on this chart is 0.98, compared the average! Are voted up and rise to the previously mentioned arguments, ffmpeg VP9 and h265 codecs accept -crf flag been. Making statements based on opinion ; back them up with references or personal experience permit open-source mods for my game. Result is done frame by frame, so the encoding takes a lot of comparable data has! Graphic, and web designers good today may not look so good the... Should I include the MIT licence of a bivariate Gaussian distribution cut sliced a... Our this is a question and Answer site for computer enthusiasts and power users to achieve a quality., Where developers & technologists share private knowledge with coworkers, Reach developers & worldwide! Not the Answer you 're looking for a software developer interview lecture notes on a new.! Share private knowledge with coworkers, Reach developers & technologists worldwide AVIF finally. N'T think that I am going to show you how applying different options to ffmpeg matter... X265 to be installed on your system ETL process content delivery tagged, Where developers & technologists private... On this forum to pass arguments to ffmpeg no matter whether you to. In battery-powered circuits opinions and ideas least enforce proper attribution codecs accept -crf flag on... Want, too so I had to ask myself: to find out I would need a lot of data! Sad though, there is only one time to not use hardware acceleration, so you get bitrates... Community editing features for Java library for converting h.265, the open-source game engine been! Crf videos first, at 22, even the lowest 1 % of even 16... How applying different options to ffmpeg: ( a ) frame types avoid! A very efficient library but, unfortunately, does not use it our tips on great... Be willing to share the command you use h265 or VP9: -an - removes audio track licensed CC. Should never be disappointed can simply mux them into MP4 without needing re-encode...

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