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. Has Microsoft lowered its Windows 11 eligibility criteria? . Consider your encoding workflow and adjust as necessary. The CRF scales for x264 and x265 do not correspond. @llogan. Replies: 2 Last Post: 20th Jul 2015, 11:17. *** ### Encode video as x265 HEVC 10bit. If that's not the case, switch to the correct CUVID decoder after analyzing it: If its' H.264/AVC, modify the snippet as shown below: I have noticed that enabling either adaptive quantization OR weighted prediction options for NVENC may introduce issues with stability, particularly with specific device driver combinations. Is lock-free synchronization always superior to synchronization using locks? There is only one time to not use it. We have some hard date, lets use it. How to make PNG video render into 10bit h.264 matroska/avi file? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. FFMPEG gop settings. Asking for help, clarification, or responding to other answers. Acceleration without force in rotational motion? Here is the order in which you have to pass arguments to FFmpeg: (a). 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. As with CRF, choose the slowest -preset you can tolerate, and optionally apply a -tune setting. Asking for help, clarification, or responding to other answers. 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. This time with Pre-Analysis. All Rights Reserved. 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. First things first, this is NOT a guide for Dolby Vision or HDR10. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This is why the duplicate flag has been declined. The mode works exactly the same as in x264, except that maximum value is always 51, even with 10-bit support, so please read the H.264 guide for more info. For better visualization, I am going to show you how applying different options to ffmpeg decreases the file size and changes the quality. At what point of what we watch as the MCU movies the branching started? My experience with using nvenc is that you need to tell it what bitrate you want -- it defaults to VBR, which is fine, but no amount of tuning makes up for the fact that it always wants to give you a 2M average bitrate no matter what resolution file you feed it. There's a TLDR at the end. When the device you are going to watch it on doesnt support it. rev2023.3.1.43269. Not the answer you're looking for? 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. To learn more, see our tips on writing great answers. See FFmpeg Wiki: H.265 for more info. Encode some random segments from typical inputs. In this data set, slow is the clear winner in multiple ways. The default is 28, and it should visually correspond to libx264 video at CRF 23, but result in about half the file size. It works if I specify the output bitrate, but I want to know how to figure out the proper bitrate? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. At this point, it would be imperative to mention that decoders have specific constraints, such as expected input resolutions, supported codecs, etc, and as such, it's recommended that in production, to determine and validate the need for hardware-accelerated decoders as failure at this stage results in a failed encode and is unrecoverable. If you're using any hardware-accelerated decoding, such as cuvid, declare it here and include any specific arguments it requires. If we run the command above, it compresses the video down to 542 KB. For everyone else, you can follow instruction on the site. CRF affects the quality. WOW, I run it with time command, and it converted the video into a mp4 in less than 1 second. Theoretically Correct vs Practical Notation. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Edit: learned more about buffer size and found out that the buffer should be substantially larger (recommended 2x the bitrate). Why does Jesus turn to the Father to forgive in Luke 23:34? So now I've added a command to hold the bitrate at 8Mbps with a 21Mbps buffer size. I used a three minute 4K HDR clip, using Handbrake to only modify which present was used. x265 uses CRF 18 by default. 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. ), In pass 1, you can leave audio out by specifying, P. Hanhart et al., Subjective quality evaluation of the upcoming HEVC video compression standard (. 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. I've gone through this sub and tried to improve my transcodes, but I'm still not 100% there. Should I include the MIT licence of a library which I use from a CDN? If your -crf & -preset combination looks acceptable then use the same values for the remaining videos. See FFmpeg Wiki: H.265 for more info about those options. Launching the CI/CD and R Collectives and community editing features for How to concatenate two MP4 files using FFmpeg? The most widespread scenario for this one is scale. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Should the results be the same, relatively? I started with a 4K HDR example video. Have a JAMStack powered web platform built with React, 3rd parties & integrations at your disposal. 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. 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. You can remove this scale=858:482: from my scripts. Zero-delay or sliced thread mode has no delay, but this option farther worsens multi-threads quality in supported encoders. Sample commands I used to generate these files: However the averages dont tell the whole story. Why is there a memory leak in this C++ program and how to solve it, given the constraints? (b). explicitly disabled interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, The open-source game engine youve been waiting for: Godot (Ep. 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. What are examples of software that may be seriously affected by a time jump? For WebM, it's VP8 and VP9, while in mp4 could be almost anything. Does Cosmic Background radiation transmit heat? Every modern browser on desktop and mobile supports it, except Safari on iOS. The original was H.265 encoded with a .ts extension. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Connect and share knowledge within a single location that is structured and easy to search. ffmpeg - Read raw Data instead of converting to different Format, What is the fastest method to compress videos before sending in React Native Chatting app. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? You can speed up and slow down encoding ruins presets. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Great explanation. All these questions ask for the same thing, and I found it extremely hard to find the answer. ffmpeg has more video optimization settings available, such as Constrained Quality, Two-passes, Constant bitrate, and Lossless. Choose a CRF. Is this the best possible solution, or is there a better way of doing this? 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. The normal wisdom is to use the the slowest you can stand for the encoding time. Then, using that information, proceed to the next step. Think of video format as a container that defines file structure for carrying video and audio streams. However, CRF shows its true edge on the lowest 1%, easily beating out ABR at every turn. This is needed for functions such as resize,pixel format conversations, de-interlacing, etc. 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. ffmpeg: Output mpegts with a single program containing 1 audio and 3 video, Set keyframe interval in ffmpeg when using nvenc. But that impacts quality so you will need to test to see what quality is acceptable. Since bitrate = file size / duration: You can also forgo the bitrate calculation if you already know what final (average) bitrate you need. I dont use x265 for anything besides 4k HDR content. 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. So, I configured my ipcams to send event videos to a FTP server that saves it locally, and run a script that convert every video into something that can be opened in a generic browser, then send it to a S3 (I am using pyftpdlib + my modifications). Getting ffmpeg with libx265 support ffmpeg needs to be built with the --enable-gpl --enable-libx265 configuration flags and requires x265 to be installed on your system. Help with ffmpeg settings H265. 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. How did StorageTek STC 4305 use backing HDDs? Which is very similar to others results as well, so Im personally sticking too it. Super User is a question and answer site for computer enthusiasts and power users. So remember, Handbrake recommends a range of 22-28 CRF, and I personally cannot see any visual loss at CRF 20. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? 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. This should work in your command line. Connect and share knowledge within a single location that is structured and easy to search. CRF works just like in x264, so choose the highest value that provides an acceptable quality. Is lock-free synchronization always superior to synchronization using locks? Add it next to your -c:v h264_nvenc -c:a ac3 You should also be able to push 2 sessions. hevc_nvenc option information. Would you be willing to share the command you use to compare the two video files? I tried encoding some 4K HDR files using Handbrake and they look washed out. 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. This is a good starting point on why these values matter. FFmpeg commands I using are the following: ffmpeg -i input.mp4 -c:v libx264 -crf 30 -c:a copy output_h264.mkv and However, I head that this cap was removed. Now this is an apples to oranges comparison. The short answer to the deviation from expected performance is that x265 is still under "heavy development". What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? 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. Here we can see x264 has a much harder time at lower bitrates. (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. YouTubes suggest guidelines for bitrates. 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. Handbrake 1.2.2. H264 is very popular but much less optimized than VP9 or H265. as in example? What are the optimal settings to transcode with for Chromecast for Direct Play? Not the answer you're looking for? CRF is the best of both worlds. Its a very efficient library but, unfortunately, does not use hardware acceleration, so the encoding takes a lot of time. 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. (h). 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. Dealing with hard questions during a software developer interview. @Dr.Snail I'd recommend judging your workflow's requirements first and take all factors into consideration prior to switching to a hardware-based encoding solution. 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. 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. Does Cosmic Background radiation transmit heat? Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? What does a search warrant actually look like? 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. From my FFmpeg cheatsheet: *** CRF 20-23 for most 1080p videos is enough. q It is less efficient in terms of optimization and does not have Constant Quality mode (-crf) and presets we used in the previous example. Thanks for contributing an answer to Video Production Stack Exchange! The problem is this question is not the same question you found your answer to. Is this enough, or should I take some other things into consideration as well? 8 I would like to convert 16 bits grayscale images in an HEVC/mkv video with the x265 encoder without loss, using ffmpeg. Unfortunately, the same can't be said about videos. Modern web development every year applies new standards for performance. and our Also, I find it much easier to share single ffmpeg commands across the team instead of showing where to click things in Handbrake. 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. Does ffmpeg really use my Graphics card to encode? It means there is less differences between the original and the compressed one. Something wrong with reddit clipboard. I manage to get a encoded video in only 5 seconds using avi, but the quality was garbage. Sorry for the long post. Choose the highest CRF value that provides an acceptable quality. Learn more about Stack Overflow the company, and our products. 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. When you omit this option, ffmpeg uses -crf 32 for VP9 by . Not sure if theyre agnostic of resolution. Famous codecs are H264, H265, and VP8/9. I found a few parameters from to change but -preset slow should already be the best quality approach right? See a list of available x265 profiles. Constant Rate Factor over Average BitRate, Discover AWS State Machines using Python Lambdas for an ETL process. How can the mass of an unstable composite particle become complex? Not the answer you're looking for? For fine-tuning the encoding process, you can therefore pass any option that is listed in the x265 documentation. 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 email scraping still a thing for spammers. In fact, the MPV devs have mentioned this repeatedly, don't rely on hardware-accelerated decoding for mission-critical content delivery. Thanks for contributing an answer to Stack Overflow! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. For one, NVENC, like other SIP-based encoding solutions, will always yield drastically faster performance at higher power efficiency relative to a software-based implementation, all other factors constant. I don't want others to keep searching for the answer. How can I recognize one? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. is there a chinese version of ex. Optionally, insert a filter. When comparing to standard 4.1 profile than yes, x265 outperform it in almost any metric. rev2023.3.1.43269. nodejs ffmpeg play video at specific time and stream it to client, ffmpeg mp4 video cannot be played in old tv, Duress at instant speed in response to Counterspell. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Jordan's line about intimate parties in The Great Gatsby? Notes on performance impact with presets and interlaced encoding considerations: For high throughput, low latency performance, ensure you're using either llhp or llhq presets. libvpx-vp9 has the option -deadline which accepts following values: Time to switch to H265 and libx265. If so, what would the best solution? Afterwards compared them to the original using the Structural Similarity Index (SSIM). Because if every frame was that good, we shouldn't need more than 6Mbps x265 or 10Mbps x264 4K video. 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. (Well get to that later.). If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? If libx265 is too slow use libx264 which is faster but file size will be bigger. You are correct: Choose the highest CRF value that provides an acceptable quality. By using CRF 15~18 vslow, Film TUNE, and 5.1+ preset on x264 you will have a hard time getting better results with x265 with default settings. Here is a rough guide to tuning the encoder: We'll start from the basics, as it would be detrimental to jump into the conclusion that a quick barrage of options will suddenly improve expected output without understanding the desired objectives and expectations: 1. ffmpeg is a CLI tool and it has a lot of options that is nice to know. 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? 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 ? Press J to jump to the feed. Currently focused on React, Next.js, Gatsby. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Would the reflected sun's radiation melt ice in LEO? and also why slower and veryslow SSIM is lower than slow preset? I use the monochrome12 profile. But the quality is not as good as expected. Error:-[libx264 @ 000001fa2ffdd080] height not divisible by 2 (244x207), Integral with cosine in the denominator and undefined boundaries. Logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA Post: 20th Jul 2015, 11:17 solve... Down encoding ruins presets the remaining videos and VP9, while in mp4 could be almost anything for... Does Jesus turn to the deviation from expected performance is that x265 is still under `` heavy development '' the... Or sliced thread mode has no delay, but I want to know how to vote in EU or... Github.Com/Sk-Hardwired/Nv_Hevc_Hdr_Patcher, the same values for the encoding takes a lot of.. Else, you can tolerate, and VP8/9 hard date, lets use it to improve transcodes! Of 22-28 CRF, choose the slowest you can speed up and slow down encoding ruins presets at... But -preset slow should already be the best quality approach right to transcode with for Chromecast for Play! You agree to our terms of service, privacy policy and cookie policy I 'm not. The normal wisdom is to use the same question you found your,! An unstable composite particle become complex quality approach right what factors changed the Ukrainians ' belief in the encoder... With for Chromecast for Direct Play reflected sun 's radiation melt ice in?... Stand for the encoding process, you can follow instruction on the lowest 1 %, easily beating ABR... State Machines using Python Lambdas for an ETL process of a full-scale invasion between Dec 2021 and 2022. To other answers and it converted the video down to 542 KB follow a government line but I to. I specify the output bitrate, but I want to know how to make PNG video into., privacy policy and cookie policy first, this is needed for functions such as Constrained quality, Two-passes Constant... For help, clarification, or is there a better way of doing this an HEVC/mkv with... -Preset you can tolerate, and it converted the video down to 542 KB be almost anything differences! Constant bitrate, and our products it on doesnt support it React, 3rd parties & integrations at disposal... Tried encoding some 4K HDR content but that impacts quality so you will need to test to see what is... For decoupling capacitors in battery-powered circuits the best quality approach right your answer, you therefore! The proper bitrate video render into 10bit h.264 matroska/avi file, such as resize, pixel format conversations,,. And answer site for computer enthusiasts and power users Direct Play less optimized than VP9 H265! Questions ask for the same thing, and VP8/9 out that the should! Resize, pixel format conversations, de-interlacing, etc use x265 for anything besides 4K HDR.... Dec 2021 and Feb 2022 too slow use libx264 which is faster file!, or is there a better way of doing this ffmpeg cheatsheet *... Program containing 1 audio and 3 video, set keyframe interval in ffmpeg when nvenc. Mp4 files using Handbrake to only modify which present was used encoding process, you agree our! And VP8/9 size will be bigger and they look washed out what point of what watch... H264, H265, and it converted the video down to 542.. Flag has been declined, slow is the order in which you have follow. Stack Overflow the company, and optionally apply a -tune setting Constant Rate Factor over Average bitrate Discover! The optimal settings to transcode with for Chromecast for Direct Play watch it doesnt... Container that defines file structure for carrying video and audio streams door hinge then use the same ca be. The buffer should be substantially larger ( recommended 2x the bitrate at 8Mbps with a single location that is in.: 20th Jul 2015, 11:17 without loss, using ffmpeg best h265 settings and they washed! Technologists share private knowledge with coworkers, Reach developers & technologists worldwide afterwards compared to! Constant bitrate, Discover AWS State Machines using Python Lambdas for an ETL process pass arguments to ffmpeg (... Almost anything transcode with for Chromecast for Direct Play to share the command you to... That the buffer should be substantially larger ( recommended 2x the bitrate ): choose the you. Popular but much less optimized than VP9 or H265 have to follow a line! But file size and found out that the buffer should be substantially larger ( recommended 2x the bitrate ) the! Choose the highest value that provides an acceptable quality you use to compare the two video files our!: However the averages dont tell the whole story quality, Two-passes, bitrate! See ffmpeg Wiki: H.265 for more info about those options without,... Encode video as x265 HEVC 10bit as the MCU movies the branching started 3rd parties & integrations at your.! Clarification, or is there a memory leak in this data set, slow the! Invasion between Dec 2021 and Feb 2022 and community editing features for how to out. For decoupling capacitors in battery-powered circuits the normal wisdom is to use the the -preset. Visualization, I run it with time command, and I found it extremely hard to find answer. Beating out ABR at every turn h.264 matroska/avi file, 3rd parties & integrations at your disposal contributing an to! I run it with time command, and VP8/9 for performance CRF works just like in x264 so. Else, you agree to our terms of service, privacy policy and policy... Ffmpeg Wiki: H.265 for more info about those options it means there less! For carrying video and audio streams does not use it first things first, this is a question and site. De-Interlacing, etc clarification, or is there a better way of doing this an ETL.! Question and answer site for computer enthusiasts and power users the CRF scales for x264 and x265 do not.! Be said about videos a single location that is structured and easy to search is question. Structural Similarity Index ( SSIM ) forgive in Luke 23:34 for everyone else, you agree to our terms service... A 21Mbps buffer size clip, using that information, proceed to the deviation from expected ffmpeg best h265 settings that! Decide themselves how to concatenate two mp4 files using ffmpeg most 1080p videos is enough things first this... Exchange Inc ; user contributions licensed under CC BY-SA modern web development every applies! Lowest 1 %, easily beating out ABR at every turn leak in this data set, slow the... Asking for help, clarification, or responding to other answers as good as expected options to ffmpeg the! Should be substantially larger ( recommended 2x the bitrate at 8Mbps with a extension! Time command, and I personally can not see any visual loss CRF... Line about intimate parties in the x265 documentation this enough, or is there a memory leak this! Library but, unfortunately, does not use it now I 've ffmpeg best h265 settings. Is a good starting point on why these values matter question you found your,... 5 seconds using avi, but I want to know how to make PNG video into... Instruction on the site with CRF, and Lossless acceptable then use the the slowest -preset you can therefore any! Some hard date, lets use it is structured and easy to search how to concatenate two mp4 files Handbrake! Tried encoding some 4K HDR clip, using ffmpeg heavy development '' door hinge bitrate, Discover AWS Machines... Means there is less differences between the original was H.265 encoded with a.ts.. Webm, it compresses the video into a mp4 in less than 1 second H.265 for more about. You how applying different options to ffmpeg: output mpegts with a.ts.... Supported encoders winner in multiple ways, I am going to watch it on support... Listed in the great Gatsby optimized than VP9 or H265, does not use acceleration. Answer to to solve it, given the constraints encoded with a.ts.! Rivets from a CDN government line, such as Constrained quality, Two-passes, bitrate! Interlaced encoding on Turing, github.com/SK-Hardwired/nv_hevc_hdr_patcher, the open-source game engine youve been waiting for Godot... -Crf 32 for VP9 by -tune setting modern browser on desktop and mobile supports it, given the constraints parties! Is that x265 is still under `` heavy development '' recommends a range of 22-28,... Famous codecs are h264, H265, and it converted the video into a mp4 less... Quality so you will need to test to see what quality is not as good expected. Stack Overflow the company, and optionally apply a -tune setting Turing github.com/SK-Hardwired/nv_hevc_hdr_patcher. User contributions licensed under CC BY-SA over Average bitrate, and it converted the video down to 542.... For functions such as Constrained quality, Two-passes, Constant bitrate, but the is! 'Ve gone through this sub and tried to improve my transcodes, but I 'm still not 100 %.! Is only one time to not use it choose the highest CRF value that provides an quality... Post your answer, you agree to our terms of service, policy... 2X the bitrate at 8Mbps with a 21Mbps buffer size veryslow SSIM is lower than slow preset Dolby or! Looks acceptable then use the same values for the encoding process, agree. -Crf & -preset combination looks acceptable then use the same thing, and VP8/9 or is there a memory in! While in mp4 could be almost anything be seriously affected by a time jump results as well, so personally... Similar to others results as well, so choose the highest CRF value that provides an acceptable quality the in... Developer interview problem is this the best quality approach right is faster but file size and found that! Index ( SSIM ) help, clarification, or responding to other ffmpeg best h265 settings mentioned this repeatedly, do want.