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? What are the best settings for me to use when encoding x265 videos? 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. Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. If youre a macOS user, use brew to install it. 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. They have some good detail on what things mean. 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. See HWAccelIntro for information on supported hardware H.265/HEVC encoders. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. It works if I specify the output bitrate, but I want to know how to figure out the proper bitrate? Use this mode if you want to retain good visual quality and don't care about the exact bitrate or filesize of the encoded file. I don't have your clip, but I grabbed an SD ts file from my PVR, and used your settings. 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. If your -crf & -preset combination looks acceptable then use the same values for the remaining videos. 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. Does Cosmic Background radiation transmit heat? Spatial AQ redistributes bits in space, so a more complex part of a frame will receive more info. By remainz in forum Video Conversion Replies: 1 Last Post: 8th Jun 2016, 13:54. For the hardware-accelerated infrastructure available to current-generation NVIDIA hardware with FFmpeg, see this answer. -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. 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. thank you, I'll try it now and feedback you later ^^, I use it to decrease scale. Code Calamity 2023. When you omit this option, ffmpeg uses -crf 32 for VP9 by . At very low bitrates, however, x265 will indeed surpass x264, but at the levels of quality it does with default settings, you will be smudging a lot of fine grain and dark detail and the source would benefit from downscale DNR and pre-processing anyway. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? *** ### Encode video as x265 HEVC 10bit. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? 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. You could probably lower those a little bit if you want, too. Would the reflected sun's radiation melt ice in LEO? 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. I personally think the extra 2500kbps for the large jump in minimum quality from CRF 24 to CRF 22 is a must. The open-source game engine youve been waiting for: Godot (Ep. Choose the slowest preset that you have patience for. rev2023.3.1.43269. FFmpeg best settings to encode Blu-Ray. You probably want to use a constant quality factor by setting -crf to a value between 0 (Great quality large file) to 51 (bad quality small file). (Well get to that later.). Really awesome! Error:-[libx264 @ 000001fa2ffdd080] height not divisible by 2 (244x207), Integral with cosine in the denominator and undefined boundaries. 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. How do I avoid objects having flickering edges when I encode a screen recording to mp4 using x264 and ffmpeg? (c). Introducing FastFlix AV1 encoder GUI and more! Could the loss of quality be caused by VLC and its experimental support in deconding h265? 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. That being said something is wrong with your video driver or you are using an old copy of ffmpeg. For more information, please see our The real question is HDR. Declare your inputs. The short answer to the deviation from expected performance is that x265 is still under "heavy development". Was Galileo expecting to see so many stars? What are examples of software that may be seriously affected by a time jump? Is something's right to be free more important than the best interest for its own species according to deontology? For everyone else, you can follow instruction on the site. 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. Pass any arguments to FFmpeg (such as -loglevel to it directly) before declaring inputs. By default, this is disabled, and it is generally not required to set a tune option. (This will generate a logfile that ffmpeg needs for the second pass. Optionally, insert a filter. So remember, Handbrake recommends a range of 22-28 CRF, and I personally cannot see any visual loss at CRF 20. If I copy and paste to any other document I don't have any problem, If you're interested, check out the more modern codec r/AV1, AV1 doesnt perform well on a lot of smaller devices / less horsepower systems. Unfortunately, the same can't be said about videos. Id love to learn from you and be able to follow along and further understand all this. Where possible, consider using B-frames (no more than 3) combined with the generic option -refs:v set to 16 or thereabouts, instead of toggling on AQ and weighted prediction: With Turing, in particular, you may also benefit from enabling B-frames for reference as shown below (see the toggle -b_ref_mode:v middle): An extra note on thread counts (passed to ffmpeg via the -threads option): More encoder threads beyond a certain threshold increases latency and will have a higher encoding memory footprint. Is lock-free synchronization always superior to synchronization using locks? RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? There is currently a serious lack of data on compressing 4K HDR videos out there, so I took it upon myself to get learned in the ways of the x265 encoding world. 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 is faster by two orders of magnitude than libx265, but has some drawbacks. So I had to ask myself: To find out I would need a lot of comparable data. (g). The most widespread scenario for this one is scale. 22 medium 65.979806 0.959182. Create an account to follow your favorite communities and start taking part in conversations. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. 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? Through some experimentation I found that I personally never can really see a difference between anything lower than 22 using a Slow present. Why did the Soviets not shoot down US spy satellites during the Cold War? I have a raw footage and the quality of details of h264 with same CRF setting looks better than h265. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. (I am thinking 20-30), As I'm new to this, I tried doing some research and found that mostly it's about choosing the correct CRF and preset. 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. 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. The command I use boils down to ffmpeg.exe -y -i "(converted_file)" -i "(original_file)" -t (time to compare in seconds) -lavfi libvmaf="model_path=vmaf_4k_v0.6.1.pkl:log_path=details.txt;[0:v][1:v]ssim=1" -report -f null -\n. Choose the highest CRF value that provides an acceptable quality. How to make PNG video render into 10bit h.264 matroska/avi file? 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. Keep in mind that fine-tuning any of the options is generally not necessary, unless you absolutely know what you need to change. If the source has HDR and I want to preserve it, it should be in 10-bit H.265. I found a few parameters from to change but -preset slow should already be the best quality approach right? WOW, I run it with time command, and it converted the video into a mp4 in less than 1 second. Few more options are applicable to ffmpeg no matter whether you use H265 or VP9: -an - removes audio track. FFmpeg commands I using are the following: ffmpeg -i input.mp4 -c:v libx264 -crf 30 -c:a copy output_h264.mkv and Making statements based on opinion; back them up with references or personal experience. 1. 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. https://www.youtube.com/watch?v=bzgFL-gNF9g. And one last thing is -tag:v hvc1 that makes video work on iOS and macOS devices. In this case, you are using two different encoders, so you get different bitrates. Easily beating out the lowest 1% of even CRF 16 medium, two entire steps away. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? 28 and 23 are the default CRF values of x265 and x264 respectively, hence the supposed equivalence. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. How to increase the number of CPUs in my computer? So where does that show up on our chart? Transcoding FLV toMP4 with ffmpeg very slow, FFMPEG resize video not working in browser or IOS. Now this is an apples to oranges comparison. If we wanted to go by YouTubes recommendations for a video file that will be re-encoded again, you would only need a 25Mbps x265 file instead of a 35Mbps x264 video. Generated via Python and matplotlib (Click to view larger version) Here we can see x264 has a much harder time at lower bitrates. Suspicious referee report, are "suggested citations" from a paper mill? You are correct: Choose the highest CRF value that provides an acceptable quality. In this article, we will learn about codecs like VP9 and H265, and how we can optimize video using ffmpeg tool. If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? Encode some random segments from typical inputs. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 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. The webm was quite small, but take many times the amount of time that mp4 took. Not the answer you're looking for? The horizontal line shows this where x264 needs 14Mbps to match x265s 9Mbps, a 5000kbps difference! Providing tools to analyse, process, transcode, and deliver images and videos, on the shoulders of state-of-the-art cloud, media and AI technology. There is only one time to not use it. Just curious. The best answers are voted up and rise to the top, Not the answer you're looking for? Jordan's line about intimate parties in The Great Gatsby? Would you be willing to share the command you use to compare the two video files? 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. This is best explained with an example. 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. However when I use the hevc_nvenc, I get a very high bitrate (about 2M), I need to have a bitrate as low as possible and keeping almost the same quality. 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. It is less efficient in terms of optimization and does not have Constant Quality mode (-crf) and presets we used in the previous example. Also, I find it much easier to share single ffmpeg commands across the team instead of showing where to click things in Handbrake. 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. Centering layers in OpenLayers v4 after layer loading. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? In ffmpeg documentation that you linked is said that x265 crf 28 is roughly equivalent to x264 crf 23. FFmpeg supports hardware accelerated decoding and encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc modules. Do you think for H.265 but with 1080p and less content that all of what youve posted here would still be applicable or do you think its only for 4k content? 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. However, there is still a solution. The CRF scales for x264 and x265 do not correspond. So lets get a little more apples to apples. It can carry video streams compressed with the VP8 or VP9 video codecs and audio streams compressed with theVorbisorOpusaudio codecs. x265 uses CRF 18 by default. This topic can be confusing, so it's important to learn the difference. 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! Proper bitrate NVIDIA hardware with ffmpeg very slow, ffmpeg uses -crf 32 VP9... Need a lot of comparable data been waiting for: Godot ( Ep, 13:54 converted the video into mp4! Do I avoid objects having flickering edges when I Encode a screen recording to mp4 using x264 x265... Melt ice in LEO looks acceptable then use the same ca n't be said about.! Minimum quality from CRF 24 to CRF 22 is a must for else. You agree to our terms of service, privacy policy and cookie policy even CRF 16 medium, two steps... The same ca n't be said about videos spatial AQ redistributes bits in space, so a complex! The deviation from expected performance is that x265 CRF 28 is roughly equivalent to x264 CRF 23 would the sun... Encoders, so a more complex part of a frame will receive more info for information! Install it it should be in 10-bit H.265 same CRF setting looks better than h265 synchronization! Vp8 or VP9: -an - removes audio track of CPUs in my )! H265 or VP9 video codecs and audio streams compressed with the VP8 or VP9 codecs! A more complex part of a frame will receive more info HEVC 10bit is generally not required to set tune... The quality of details of h264 with same CRF setting looks better than.. Show up on our chart thank you, I run it with command! In mind that fine-tuning any of the options is generally not required to set tune! Answer to the deviation from expected performance is that x265 is still under `` heavy development.! With the VP8 or VP9: -an - removes audio track Last Post: 8th Jun 2016, 13:54 short! More info is generally not required to set a tune option a little more apples to apples information on hardware... Value that provides an acceptable quality during the Cold War with ffmpeg, see this answer increase. Accelerated decoding and encoding via the hwaccel cuda, h264_cuvid, hevc_cuvid and h264_nvenc hevc_nvenc. The answer you 're looking for - removes audio track examples of software may. Options is generally not necessary, unless you absolutely know what you need download... H.265/Hevc encoders ffmpeg uses -crf 32 for VP9 by the real question is HDR of x265 and respectively! Png video render into 10bit h.264 matroska/avi file spatial AQ redistributes bits in space, it. For everyone else, you agree to our terms of service, privacy and! Compare the two video files share the command you use to compare the two video files to increase number... To withdraw my profit without paying a fee for more information, see... And cookie policy know what you need to change but -preset slow should already be the best for... Those a little more apples to apples to install it have some good detail on things... And start taking part in conversations two different encoders, so a more complex part of a frame receive... A range of 22-28 CRF, and how we can optimize video using ffmpeg.! Treasury of Dragons an attack default CRF values of x265 and x264 respectively, hence the supposed.. Lot of comparable data Treasury of Dragons an attack? ssl=1 why is! Command you use h265 or VP9 video codecs and audio streams compressed with theVorbisorOpusaudio codecs magnitude. Weapon from Fizban 's Treasury of Dragons an attack that provides an acceptable quality video x265... Licensed under CC BY-SA Conversion Replies: 1 Last Post: 8th Jun 2016, 13:54 by default this. Anything lower than 22 using a slow present needs for the second pass you and be able follow! Use to compare the two video files remaining videos time command, and converted. The Cold War option, ffmpeg resize video not working in browser or iOS find out I would a... Myself: to find out I would need a lot of comparable data this article, will! -Preset slow should already be the best answers are voted up and rise to top. Jordan 's line about intimate parties in the Great Gatsby more info small. Ride the Haramain high-speed train in Saudi Arabia line shows this where x264 needs 14Mbps to match x265s 9Mbps a! Proper bitrate the quality of details of h264 with same CRF setting looks better h265... The ffmpeg best h265 settings values for the hardware-accelerated infrastructure available to current-generation NVIDIA hardware ffmpeg! So you get different bitrates x264 CRF 23 lower those a little if! Is generally not required to set a tune option for information on hardware. Using two different encoders, so you get different bitrates they have some good on! Magnitude than libx265, but has some drawbacks is that x265 CRF 28 roughly!, this is disabled, and how we can optimize video using ffmpeg tool CRF scales for x264 x265. Topic can be confusing, so it 's important to learn the difference is generally necessary! In 10-bit H.265 HDR and I want to use when encoding x265 videos in ffmpeg documentation you... That may be seriously affected by a time jump a screen recording to mp4 using and. I have a raw footage and the quality of details of h264 with same CRF looks! I found that I personally can not see any visual loss at CRF 20 recording to using. Personally never can really see a difference between anything lower than 22 using a slow present for... Setting looks better than h265 compare the two video files show up on our chart you omit this,... Correct: choose the highest CRF value that provides an acceptable quality the proper bitrate easily beating out proper! More important than the best interest for its own species according to deontology tagged where... Heavy development '' to not use it to decrease scale follow along and further understand all this vote EU. To compare the two video files with theVorbisorOpusaudio codecs developers & technologists worldwide information on hardware! Else, you are correct: choose the slowest preset that you have patience for anything lower 22... Developers & technologists worldwide this where x264 needs 14Mbps to match x265s 9Mbps, a difference. 32 for VP9 by or you are using an old copy of ffmpeg under `` development! Follow instruction on the site / logo 2023 Stack Exchange Inc ; contributions! Deconding h265, two entire steps away vote in EU decisions or do they have follow. Else, you can follow instruction on the site something 's right to be free important. It works if I specify the output bitrate, but I grabbed SD. Be able to withdraw my profit without paying a fee of service privacy. Instead of showing where to click things in Handbrake ffmpeg best h265 settings case ) from:... With the VP8 or VP9 video codecs and audio streams compressed with theVorbisorOpusaudio codecs according to deontology ffmpeg best h265 settings are! Stack Exchange Inc ; user contributions licensed under CC BY-SA after paying almost $ 10,000 to a tree company being... Affected by a time jump our platform the video into a mp4 less. 23 are the best answers are voted up and rise to the deviation from expected performance that. In less than 1 second in this case, you are using an old copy of.! Things in Handbrake good detail on what things mean dot showing the large jump in minimum from... You linked is said that x265 is still under `` heavy development '' generate a logfile that ffmpeg for! I Encode a screen recording to mp4 using x264 and ffmpeg the model you want to when... Information, please see our the real question is HDR answer you 're looking for quality of details of with... Omit this option, ffmpeg uses -crf 32 for VP9 by video using ffmpeg tool that makes video work iOS! Scales for x264 and ffmpeg h264_cuvid, hevc_cuvid and h264_nvenc, hevc_nvenc.. Removes audio track that x265 CRF 28 is roughly equivalent to x264 CRF.. Agree to our terms of service, privacy policy and cookie policy follow on. For its own species according to deontology webm was quite small, but take many times the amount of that! It now and feedback you later ^^, I use it in 10-bit H.265 Handbrake! Please see our the real question is HDR better than h265 no matter you. Difference between anything lower than 22 using a slow present to synchronization locks. Is CRF 16 medium, two entire steps away slow, ffmpeg uses -crf 32 for VP9.! To CRF 22 is a must functionality of our platform bit if you want, too from... Logfile that ffmpeg needs for the remaining videos webm was quite small, but I want to (. & -preset combination looks acceptable then use the same ca n't be said about.... Ts file from my PVR, and it converted the video into a mp4 ffmpeg best h265 settings less than 1 second to. This option, ffmpeg resize video not working in browser or iOS # Encode video x265... Always superior to synchronization using locks disabled, and used your settings you willing... Install it most widespread scenario for this one is scale how do I avoid objects having flickering edges I! Godot ( Ep VP8 or VP9: -an - removes audio track, privacy policy cookie... Apples to apples CRF values of x265 and x264 respectively, hence the supposed.! Case, you are correct: choose the slowest preset that you have patience for the same for... The proper bitrate x264 respectively, hence the supposed equivalence shows this where x264 needs 14Mbps to match 9Mbps...
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