From what I understand, av1an calculates VMAF per scene and has to encode a scene & calculate the VMAF with multiple CRF values (when it doesn't get lucky) to find the optimal one for each scene. select: correct order and good video quality (9. One instance of 1080p 30fps content will need less than 1GB of RAM. It's going to produce more efficient encodes because it uses chunk-based encoding to reach the required VMAF for every single chunk, but this is also slower because every chunk will be re-encoded until the VMAF target is reached. Also, activate thread pinning through --set-thread-affinity X (threads/worker) or something. avif. make -j 16. Onboard AI learns any GitHub repo in minutes and lets you chat with it to locate functionality, understand. Settings for standalone aomenc that I use with default aomenc(mostly for chunked encoding in av1an/nmkoder with thread pinning and aomenc-by-gop) at 1080p:--threads=2 --cpu. As with the use of av1an, some excessive threading tools can be disabled, not only can efficiency be improved, it can also use the function of thread pinning to reduce inefficiencies in cpu time. AV1AN now defaults to using vapoursynth for chunking and I've literally never had it skrew up, ever. It's also a PITA to compile, has a long list of bugs, and isn't. For AV1 you can use a CRF value of 0 for lossless encoding. The text was updated successfully, but these errors were encountered: All reactions. 8. It's going to produce more efficient encodes because it uses chunk-based encoding to reach the required VMAF for every single chunk, but this is also slower because every chunk will be re-encoded until the VMAF target is reached. Hey guys, I made a Python wrapper script to use Av1an with StaxRip. It divides the source video into chunks and has an option to set a target vmaf. Assets 4. 3. If the size changes there is your difference. . Oh yeah, btw it took me 20 minutes to reply since I wanted to make sure that it actually encodes the whole video that I had rather than crashing part of the. 2 years ago README. Handbrake uses ffmpeg, and ffmpeg already supports vvc (just confirmed it myself with ffmpeg -codecs and found . I am using av1an 0. Av1an needs to start a new encoding process for each scene while ffmpeg creates one process for the whole file. Sample encoding My answer was to cut a. Turns out replacing the backslashes with forward slashes makes it work fine. As you increase the strength, you increase the strength of the denoiser and how much SVT-AV1 decides to replace the original noise with synthesized noise(IE, if you increase the number, you. Does anyone know how I can resolve this issue? I'm not familiar with 'NASM' or how I would acquire it. Paramets: Auto. Webp is a lot better in that terms. webp. exe -i videoplayback. 2. Right click on hosts and edit using notepad++. nmkd • 1 yr. --auto-alt-ref=6 can also be used, but this is a --profile=2 thing, so if your HW doesn't support 10-bit HW decoding, it won't work. 1: Chooses Q between 15 and 35. My CPU has 6 cores and 12 threads. For more complete documentation, you should read the official documentation: ; SVT-AV1 Docs - GitLab . The --rc option selects what rate control strategy you want to use. Here are the components required to experience hardware accelerated AV1 video on Windows 10: One of these new GPUs or CPUs: 11th Gen Intel Core processors with Intel Iris Xe Graphics NVIDIA GeForce RTX 30 Series GPUs AMD Radeon™ RX 6000 Series Graphics (coming soon) Windows 10 build 1909 or later The. In my previous post I looked at video encoding using svt-av1 with crf & preset settings and using VMAF to rate the resultant quality. So I have been trying to resize a video to 1052x1920 while using SVT-AV1 codec and SVTENC encoder and having a target-quality set. Target quality, VMAF plotting, and more, available to take advantage for video encoding. Compile av1an Install rustup curl --proto '=--tlsv1. Av1an is a video encoding framework. By setting the vmaf target high enough, say 96, it's almost certain the output file will be visually lossless. Quality can be preserved by increasing bitrate by probably around 25% to account for less efficient GPU. exe cmd output D:Videoav1 arget ele. 04) can't mux av1 files correctly, so av1an can't merge the streams from different threads together. When I was compiling Av1an on Linux I had to install additional packages. 1X = 100ISO, NX= N*100ISO Since the grain synth guide is still valid, I’ll just copy paste it from my 3rd generation guide: For --denoise-noise-level=XX (crappy name, I know), a higher number dictates a larger amount of noise. If the issue still. The other downside beside converting speed was CPU usage ~160% of two cores libsvtav1 were reaching something around 190%. FreezyLemon • 1 yr. I hadn't tried resuming the encode since last time I tried it the results were subpar. ago. @se17p If av1an crashes with a segfault, it basically means that there is some kind of ABI mismatch for dynamically linked libraries. Is there any way to provide an alternative build of an encoder library to av1an? For example use a my own build of aom-av1-lavish instead of the stock aomenc. You can also try building with cargo build --release --feature ffmpeg_static to statically link ffmpeg. When you are done, save the queue to a file for later, or run it now with the encode button. SVT-AV1 in some cases is as good as AOM-AV1, and in others it's a night and day difference. AOM is excellent for encoding Anime, but painfully slow even with tools like av1an. Ensure you're using the healthiest python packages. This worked for me when I last tried, but my goal was to. Av1an is a Python library that allows you to easily and efficiently encode videos using various encoders, such as AOM, RAV1E, SVT-AV1, VVC, VTM and more. Find the file named Cargo. This allows the encoder to be a lot more efficient, so always use it. It's going to produce more efficient encodes because it uses chunk-based encoding to reach the required VMAF for every single chunk, but this is also slower because every chunk will be re-encoded until the VMAF target is reached. 8 branch or 0. It's going to produce more efficient encodes because it uses chunk-based encoding to reach the required VMAF for every single chunk, but this is also slower because every chunk will be re-encoded until the VMAF target is reached. The Av1an numbers don't include the scene detection time which here would be around 8s. mkv to mp4 format (4), av1an encodes successfully. I have remembered that I change my video to mp4 file input or raw video input and run--photon-noise=X as an av1an parameter if you use av1an. mkv -vcodec libx265 -crf 25 -preset medium -report DOTA2. Thanks for explaining this. 9. and it be a fast boi. OS: Windows 10 Installed Software: av1an 6. It can increase your encoding speed and improve cpu utilization by running multiple encoder processes in parallel. 4 secondsBasically Av1an. I don't know about the implementation details or if this is a bug or intentional, but from observation I assume these are the probe processes and only the final pass for a chunk. 11 is installed. Wrong, aomenc tiles are log2. So, to the OP, absolutely AV1 is very much superior to VP9 (which in turn is superior to AVC). raysar. Docker Pull Command. Encoding doesn't require a powerful PC to run. #8. 4, you can simply use the -crf 0 argument. Fixes. --rc 0. Edit: as someone elsewhere in the thread pointed out, if holding ourselves to the strictest level of pedantry: "AV1" can mean the standard describing the AV1 video format, and "AV1" is also the video format defined by that standard. ago. The AVX-512 capable CPUs really shine with this Intel open-source video encoder really being well optimized there. SVT-AV1 is almost on par with Intel AV1 hardware encoder. Twitch is the world's leading video platform and community for gamers. You have not understood what Av1an does. 3. For some animated content, that can end up with bitrates as low as 900kbps for hd material. \t\tThe SVG plot is created in the same directory as the output file. Example with default parameters: av1an -i input With your own parameters: Example settings and explanation Constant quality --end-usage=q --cq-level=30 --cpu-used=4 --threads=64 . (source: “comparison” sheet, table C18-C19) When only using CPUs, both Pro and Free had similar performances. After 2140 frames were encoded, only 2099 of them left. From the blog post. (source: “training” sheet, column B and D)This method results in the smallest amount of time with idle cores, /// as the encode will not be waiting on a very long chunk to finish at the end of the encode after all other chunks have finished. It's going to produce more efficient encodes because it uses chunk-based encoding to reach the required VMAF for every single chunk, but this is also slower because every chunk will be re-encoded until the VMAF target is reached. Presets now range from 0 to 13, with the default being 12 (edit: preset 13 seems to be mostly for debugging purposes). Now, Av1an uses parts of the Rav1e encoder for scene change detection. A codec is an en code r, a dec oder, or most properly both. Short URLs. 1. 265/HEVC and 50% compared to. mkv -o testout. It just needs to be there so that the value can be replaced. Av1an A cross-platform framework to streamline encoding Easy, Fast, Efficient and Feature Rich An easy way to start using AV1 / HEVC / H264 / VP9 / VP8 encoding. Among top 3% packages on PyPI. Features. To associate your repository with the av1 topic, visit your repo's landing page and select "manage topics. Aomenc is faster but still crap at consistently threading so yes the previous methods still apply. ago. json to that folder, it should look like this: Appsvmafvmaf_v0. 6, x64) and the latest FFmpeg Windows build from here. Target quality, VMAF plotting, and more, available to take advantage for video encoding. zip-distribution for av1an, but it's probably too much work keeping the parts updated - or the owners of these parts aren. Saved searches Use saved searches to filter your results more quickly• AV1AN - All-in-one Tool • Streaming on Social Media with RTMP • Pre-Process Files in Batch • Re-Stream to multiple destinations • Concatenate Video Playlists • Producing HLS with FFMPEG and Bento4 • Producing DASH Streaming • Batch Processing for. I had trouble getting av1an to run until I realized there's a portable mode, and you can simply copy everything (Pyhton, Vapoursynth + plugins, exe encoders) into a single directory. However, if speed is indeed more important than one of the other two, then I do think the $140 A380 is a good buy. 78 Downloaded dashmap v5. produce multiple encodes for abr. 120s encoding time / 5fps ffmpeg -i DOTA2. 3. You don't need Python or anything else, Av1an is pure Rust. Convert WebP to AVIF. Some sources are more complex than others. Skip to content Toggle navigation Sign upWhich is why I avoid Av1an. Paul. They started work on VP10, but then instead of releasing it, it became the primary basis of AV1, with contributions from other open source video codecs. I noticed that the broken commandline includes the threading options, which. I thought it might be interesting to share the results. Blog; Sign up for our newsletter to get our latest blog updates delivered to your inbox weekly. Here is how normal encoding works: Input - > Decode - > Filter (optional) -> encoding -> Output. Moreover, the Threadripper PRO is a 24 core vs 16 core 7950X. Badge Tags. av1an/aomenc at VMAF 100 produces good quality for the bitrate but there's still obvious loss of details and quality from the source in my testing. \t--vmaf \t\tPlot an SVG of the VMAF for the encode \t\t \t\tThis option is independent of --target-quality, i. 4. The --user flag is required on linux to avoid permission issues with the docker container not being able to write to the location, if you get permission issues ensure your user has access to the folder that you are using to encode. Designed to open. python docker rust quality video ffmpeg docker-container encoder hevc scenes x265 vp9 av1 aomenc rav1e svt-av1 av1-encoders target-quality Updated Nov 7. png. There are also other AV1 capable programs like StaxRip, Hybrid, FastFlix, etc BUT they lack the splitting method used by av1an, qencoder and neav1e, which means that they are. SVT-AV1 0. 1X = 100ISO, NX= N*100ISO Since the grain synth guide is still valid, I’ll just copy paste it from my 3rd generation guide: For --denoise-noise-level=XX (crappy name, I know), a higher number dictates a larger amount of noise. in. I’m trying to package Av1an a rust project for Nix. when using ffmpeg-git with svt-av1-git, it won't build. Can anyone help me to setup/install av1an on windows ? Setup instructions and how to use it to encode videos into AV1. You have not understood what Av1an does. Closed. d:Videoav1 arget elease>av1an -i d:. Certainly for AV1 the future, because. 3 projects | /r/ffmpeg | 29 May 2023. bat. 2 Downloaded ahash v0. 分割エンコードを行ったAV1anはFFmpegとaomencと比べて3割程度、エンコード時間が短縮される結果になりました。. gz. 10 as of 1/27/23) VapourSynth64-portable-R61 (latest as of 1/27/23) Av1an. #769 opened on Jun 25 by woot000. Posted by u/Butzwack - 7 votes and 4 commentsAt this low bitrate, encoding 1080p60 video usually results in a blocky, blurry mess. . When comparing SVT-AV1 and Av1an you can also consider the following projects: HandBrake - HandBrake's main development repository. Is a new nmkoder release that takes advantages of these new versions planned? In any case, thank you for your work!I compiled Av1an from git just now, it doesn't encode and just quit, even with running as admin. The same commit builds and runs without issue on Archlinux, but on Nixos, with buildRustPackage, the build completes but the resulting binary crashes with a SegFault immediately when run. . io av1an. NotEnoughAV1Encodes is a small GUI Handler for aomenc, rav1e and SVT-AV1 (AV1). pkl" --probes 6 - With specified path to vmaf model and 6 probes per segment Scaling . AOM,. is a completely free codec developed by AOMedia. i FINALLY got around to. 09 fps, eta 0s)Queue 1 Workers 1 Passes 2 Params: -. 59. g. 3 projects | /r/ffmpeg | 29 May 2023. . 4. I saw that there were spaces around the parameter in the documentation section for -ff, so I added spaces (-ff " -vf scale=-1:1080 ") and got a similar error: av1an: error: argument --audio_params/-a: expected one argument. 10. 0% 14/14 Completed in 172. Whereas this just samples parts of a video with the goal of finding a single CRF value to encode the entire video with that results in an average VMAF. To sum it up Lots of QOL improvements all around: faster encoding, static versions of av1an, faster target-quality, better and faster scene-detection, lower RAM usage, easier build process, etc. So use the -preset 3 directly to prevent that. Encoding based on a fixed qp won't work as you said and it wouldn't make sense to do that. Contribute to Unmanic/unmanic-plugins development by creating an account on GitHub. As with VP9, it’s OK to use the fastest preset (8) with the first pass; it’s. 7GB in size but 8 hours (CPU was bottleneck). 0. Make sure your svt-av1 encoder is up-to-date. 8. It seems like it may be related to rust-lang/rust#78835, but that issue doesn't tell how to fix this. Av1an does not calculate tiles if custom command is passed to encoder. Av1an is a cross-platform framework to streamline encoding, providing an easy way to start using AV1 / HEVC / H264 / VP9 / VP8 encoding. exe attached ignores the --target-vmaf argument and encodes the video in the normal way e. --film-grain 10 enables grain synthesis with a strength of 10. 2 months, 3 weeks ago failed. About AV1: AV1 is a modern, open, and royalty-free video codec developed by the Alliance for Open Media (AOMedia) that is the successor to VP9 and promises to deliver 30% less bitrates for the same quality compared to H. Go to av1an’s gihub ( download/wget the tar. FastFlix - FastFlix is a free GUI for HEVC and AV1 encoding, GIF/WebP/AVIF creation, and more!Experimenting with av1an and aomenc. Looks like the bug was actually in the FFMS2 source plugin for Vapoursynth. Support the developer. Closed. If you're on Windows, there is Nmkoder which contains all possible. To get rav1e to work with av1an, you need to copy the rav1e executable to /usr/bin/ since the cargo install for it is broken. Guide and tutorial on how to setup Av1an and rav1e with StaxRip (using a custom-made Python wrapper script)Av1anStaxRipWrapper script: the latest stable av1an version release: master: Contains the latest av1an commit to the master branch: sha-##### Contains the commit of the hash that is referenced #. AI model: Proteus. --film-grain 10 enables grain synthesis with a strength of 10. It splits the Source Video into multiple chunks and encodes them parallel with the same given settings. Av1an is a Python library that allows you to easily and efficiently encode videos using various encoders, such as AOM, RAV1E, SVT-AV1, VVC, VTM and more. I use --workers 12 to override the default. You would have two components: the Client that would send the parameters to the Daemon and the Daemon that would perform scene detection on its inputs and add the chunks to its ever growing encoding Queue. Av1an-1,224 0. /// short-to-long - The shortest chunks will be encoded first. . I dont remembered, because I only use this for test. 0K downloads in the last 90 days. Possibly due to the ffmpeg-next crate not supporting newer ffmpeg builds?Latest Av1an, python, vapoursynth, ffms, lsmash, ffmpeg, rust, aomenc. . mkv' [matroska,webm @ 0x55892a3fc500] Could not find codec parameters for stream 5 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options [matroska,webm @. av1an -i test. This seems to fix the issue for me so I think it's just how av1an implements mkvmerge so I need to take a look at it. 2. VVC is a strong compet. it can be used with or without it. qencoder is the first gui av1 encoder to support proper video queueing. It might be worth adding (I can do it easily, if the team's cool with it) to Av1an as an option/alternative to the vs_ffms2 chunking method - essentially vs_lsmash. x264, x265, SVT-AV1, QSVEncC, NVEncC, VCEEncC comparison. 5. to add to the previous comment by @Simoms. Bitrate: Auto. Yeah, Av1an or another tool like that would be good for this situation. as an av1an parameter if you use av1an. Number of video's transcoded: 158 Video contents: self made with mobile phone; received via WhatsApp; captured streams; original digital video Input codec: mainly AVC (122 out of 158 videos) Av1an version: 0. 0. ivf) so in windows this prevent resuming av1an encoding (with -r) after CTRL+C without killing the zombie svt-av1 processes as the new svt-av1 processes runned by av1an cannot recreate the incomplete encoded. One of my encodes came out at about 7Mbps for 1080p and it was nearly indistinguishable from. It can increase your encoding speed and improve cpu utilization by running multiple encoder processes in parallel. You need the 0. av1an -i file --target-quality 90 - Will run aomenc with default settings of target-quality . 120s encoding time / 5fps ffmpeg -i DOTA2. Output settings: Encoder: H265 Main. ProductsHowever Av1an's default settings are also not that great. hard to say if MeGUI will adopt AV1. SVT has an HDR options, although I'm currently not sure whether that's enough. md 🐦 Av1an Win Script A Windows Batch script that sets up Av1an with all its dependencies for AV1 in a portable workspace. Visit Stack ExchangeGuide and tutorial on how to setup Av1an with StaxRip (using a custom-made Python wrapper script)Previous video on rav1e script: Examples of settings Constant quality: --end-usage=q --cq-level=30 --cpu-used=4 --threads=16 Target Bitrate: --end-usage=vbr --target-bitrate=1000 --cpu. First of all join the Av1an discord for feature discussion. SVT-AV1 on preset 8 is nearly as fast as x265 medium and preset 7 is faster than x265 slow while being more efficient. 8. Overview What is a Container. 9. And also visual quality metrics from something like ssimulacra2. I’d be interested to see some av1an results thrown in there using rav1e or aomenc. In theory, it is always better and more efficient to use scene-aware chunking methods like Av1an. After many attempts believing that I got some input args wrong, I confirm that the latest version av1an. Shutterencoder really doesn't do anything for parallel encoding, so it's horribly slow on a capable system. It should be stated that there's no fixed bitrate value that'll be guaranteed transparent. Go to av1an’s gihub ( download/wget the tar. It's also a PITA to compile, has a long list of bugs, and isn't. Container: mp4. 0. 8x video:0kB audio:12212kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0. And these are the values of the system variables: PYTHONPATH - C:Programm FilesPython311 PYTHONHOME - C:Programm FilesPython311. Whereas this just samples parts of a video with the goal of finding a single CRF value to encode the entire video with that results in an average VMAF. In order to link the library, compile ffmpeg with --enable-libaom (see the compilation guides ). Features. Release Notes. GeForce Now is beginning to use the AV1 codec for streams! This comes with the upgrade GPUs as Ada Lovelace based GPUs (like RTX. Depending on the use case, AV1 can achieve about 30% higher compression efficiency than VP9, and about 50% higher efficiency than H. . The amount of workers can also be manually specified here. On FFmpeg I use CRF 28. When I was compiling Av1an on Linux I had to install additional packages. For whatever reason, the build of ffmpeg that I have (shipped with Ubuntu 20. VMAF calculation failed #436. written by gb82. Target quality, VMAF plotting, and more, available to take advantage for video encoding. av1 Software enc. or if you can survive the commandline, Av1an. Targe. Code Issues Pull requests Cross-platform command-line AV1 / VP9 / HEVC / H264 encoding framework with per scene quality encoding. Installation: Download ffmpeg and ffprobe, aomenc and NotEnoughEncodes. There's also Av1an as suggested by someone else. Yeah seems to be an issue with vapoursynth. I had trouble getting av1an to run until I realized there's a portable mode, and you can simply copy everything (Pyhton, Vapoursynth + plugins, exe encoders) into a single directory. This will be a quick guide for setting options svt-av1 when using with Av1an. Av1 encoding is reasonably fast now, but encoding a full video then checking the VMAF potentially multiple times to find a good crf & preset… that is going to be not so fast. Hyper-scalable video encoding;So, welcome again everybody. Repeat for as many videos as you want to encode. GITHUB This project is my approach for making AV1 encoding as accessible and easy as it can be, while reducing encoding time and utilizing more computer resources than encoders usually do by splitting videos by scenes and running couple of encoders in parallel. Report any bugs you find ( glitching with fade-ins is known already ). An easy way to start using VVC / AV1 / HEVC / H264 / VP9 / VP8 encoding. 000 fps, ARGB, SDR Scene detection INFO [av1an_core::settings] scenecut: found 1 scene(s) [with extra_splits (250 frames): 1 scene(s)] 00:00:00 100% 1/1 (5. As you increase the strength, you increase the strength of the denoiser and how much SVT-AV1 decides to replace the original noise with synthesized noise(IE, if you increase the number, you. Because Av1an won't build on my Ubuntu 20. av1an 0. It can increase your encoding speed and improve cpu utilization by running multiple encoder processes in parallel. Try it yourself, you don't even need Av1an (although I still recommend it due to scene based encoding and resuming) as SVT scales very well around many threads. Only FFmpeg and VapourSynth are required to run Av1an, the rest of the dependencies are required only for compilation. 9 embedded (latest Python 3. Av1an and Vapoursynth are two programs used in tandem to chunk a source/input file. 2-unstable (rev 70a5304) (release) * Compiler rustc 1. 4. So I created one and pasted the module there. I dont remembered, because I only use this for test. The reencode the cropped result in in AV1 with Av1an. In both cases the encoding settings heavily depend on the content. This method needs to decode all frames that occur before a chunk, so for chunks near the end of a long source, this takes a long time. 1. 1. Using Av1an in Windows for dummies. zip-distribution for av1an, but it's probably too much work keeping the parts updated - or the owners of these parts aren. Copy link Owner. libsvtav1 with ffmpeg. Av1an. 008781%pip install Av1an==6. For Windows users, prebuilt binaries are also included in every release, and a nightly build of the current master branch is also available. If any videos are in the queue, qencoder will encode. StaxRip 3. This method allows to scale encoding speed almost linearly, and beyond what previous encoders could. Why Docker. Av1an works just fine - for Windows drop (shared-lib, stable) ffmpeg, (portable) vapoursynth, (portable) python and av1an into a directory, add the respecitive encoder exe and Bob's your uncle. More lookahead in the form of lag-in-frames in aomenc gives you Better rate control. I also noticed that AV1an defaults to 2 passes with AOM, while my ffmpeg parameters only do 1 pass. Report any bugs you find ( glitching with fade-ins is known already ). Neither av1an or qencoder currently support this use case. 3. The text was updated successfully, but these errors were encountered: All reactions. Swine Influenza. You can also use rav1e or SVT-AV1 but it will provide lower quality at same bitrate. 48s Installing av1an v0. It currently supports aomenc, rav1e and SVT-AV1. NotEnoughAV1Encodes is a tool to make encoding easier and faster for AV1 encoders. 15. mov -c:v libx264 -crf 0 ToS. So in summary, this is a misleading "comparison" in which VVC was purposefully crippled. For multiplatform and more features check out the CLI Tool Av1an. Instead of bitrate I would recommend to use constant quality due to different content requiring different bitrates. The only relevant values are min_q, max_q and VMAF target. Anyway, here's how I would do it. 5. The cq-level in the video params will be changed accordingly from Av1an. dll to avcodec-58. aomenc with chunking/scene detection split. docker pull luigi311/av1an. It doesn't require building from source or modifying any path variables. Bitrate: Auto. Av1an AFAIK can only set the encoder to a fixed QP for the whole scene. Story Needed an AV1 encoder. libx265. There's also Av1an as suggested by someone else. Presets now range from 0 to 13, with the default being 12 (edit: preset 13 seems to be mostly for debugging purposes). First of all join the Av1an discord for feature discussion. json is indeed generated by scene detection using "--split-method av-scenechange" but for some reason AV1AN crashes without warning. An example is better film grain generation and the option to disable source denoising. There are charts on this. 1 with the current command and 1 with the preset out of -svtav1-params. 7 fps. Av1an fixes this by chunking out the file and encoding those chunks with different workers to make sure all cpu is used. When encoding UHD HDR material into FHD SDR material one needs complex ffmpeg filters to do so; those are currently not compatible with av1an, at least not with the (currently) best chunk method av. Stay Updated. So I'm using Av1an with the following command-line to encode a 2160p video: I'm using the latest git master of both Av1an and svt-av1. gellis12 • 2 yr. 10 as of 1/27/23) VapourSynth64-portable-R61 (latest as of 1/27/23) Av1an. But to fully utilize 8 thread CPU you don't need 8 instances to. Skip to content Toggle navigationWhile not ideal, creating a lossless x264 encode prior to feeding it into av1an does circumvent the issue if you want to try av1an now. And then there’s VapourSynthjust tested it again with av1an compiled to the latest commit, this bug still occurs as I described it back in january, albeit without the "Specify stream dimensions " message coming up at all. Av1an. 8. Here is how it looks with that method. Each time I get an e. ago. I personally use the likes of Av1an and set a VMAF target to get the quality I'm after.