ab-av1
ffmpeg-quality-metrics
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ab-av1 | ffmpeg-quality-metrics | |
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19 | 17 | |
339 | 367 | |
- | - | |
7.5 | 5.0 | |
22 days ago | about 2 months ago | |
Rust | Python | |
MIT License | - |
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ab-av1
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AV1 is very fast and versatile but…
Calculate vmaf before you encode the whole file. -> https://github.com/alexheretic/ab-av1 has a search mode with samples, the estimation of time and filesize is very good and does everything in one step
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AV1 tool to auto compress old video files for archive
ab-av1 auto-encode with a VMAF quality target of 97-98 + a script for the deletion of files sounds like what you need.
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Automatic choose encode settings?
ab-av1
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RFC: redb (embedded key-value store) nearing version 1.0
My case is ab-av1, a cli for encoding videos. The local db stores cached vmaf analysis.
- I'm just running videos through libsvtav1 on ffmpeg with -crf 35. Any tips to improve this command?
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A little script to parse large libraries to AV1, if you're interested
If the goal is space saving and a consistent visual quality rather than just having a library as AV1 for its own sake, I'd use ab-av1. Not sure how (or if) it'll handle the Opus audio channels cases, but bugs can be filed.
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Feels like re-encoding video gets harder and harder to improve (and use!) when new ones come along.
Try this https://github.com/alexheretic/ab-av1
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Looking for some good AV1 testing and comparison results.
Use this tool and you will get excellent results https://github.com/alexheretic/ab-av1 calculates and converts automatically calculates the vmaf and crf properly
- automatically optimize (re)encoding quality
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CRF 15 x265 advanced options
Check this, might help you optimize the process.
ffmpeg-quality-metrics
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VMAF is confusing me
Have you seen ffmpeg-quality-metrics? I went with the docker option. I figured that would keep it simple with ffmpeg versions/whatever.
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VMAF
I'm not good at computers, so I love ffmpeg-quality-metrics. I use the docker version because I didn't want to fight with dependencies.
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Encoding tv shows and movies
There are even tools that can compare the quality for us, like ffmpeg-quality-metrics can give a VMAF score as used by Netflix for the visual quality difference.
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Should I recompress video I shot with mobile?
You can at least test the quality difference between two encodes with something like ffmpeg-quality-metrics. If it has a high VMAF score and saved a bunch of space for something that doesn't need to be perfect, then I consider it fine.
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did I fail at preserving dvds? mpeg2 vs h264 vs av1
ffmpeg-quality-metrics is nice for comparing quality between copies. Better than squinting at pixels IMO.
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Movie or scene to test out different bitrates and resolutions
If you're re-encoding video then ffmpeg-quality-metrics is a great tool IMO. Can give you a scale from 0-100 of how similar it appears based on SSIM or VMAF. If I get a VMAF in the high 90's, like 95+, then I know the encode is decent and if it saved significant space (if that's the goal?) then it's a keeper.
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av1an crashing when using vmaf on Windows 10
It's working. I found this [model](https://github.com/slhck/ffmpeg-quality-metrics/blob/master/ffmpeg_quality_metrics/vmaf_models/vmaf_v0.6.1neg.json) with the help of u/Felixkruemel and I specified the vmaf path in av1an using `--vmaf-path=path to the/vmaf/model.json"`
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How to examine video quality?
Then, after the encode, if you want to compare original vs encoded quality there's ffmpeg-quality-metrics which makes it easy to get VMAF & SSIM scores between the two.
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If FLAC for audio = Remux for video, what's the video equivalent for 320kbps MP3 when it comes to 1080p Movies/TV shows?
ffmpeg-quality-metrics is a good tool to compare before & after encodes. It can easily calculate VMAF & SSIM scores. If I understand it correctly (I might not), then anything in the high 90s for VMAF is considered hard-pressed to be able to tell. Sometimes it hits 100, which makes me fairly confident about those encodes.
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High Bitrate
idk. When I did a re-encode with CRF 23 and preset 'veryslow' it went down to 2,236 kb/s. When I do a VMAF and SSIM test with ffmpeg-quality-metrics I was getting decent scores. It takes the file size down to 2.1GB. So my guess is they either set a significantly lower CRF or set a manual bitrate and aimed for the moon.
What are some alternatives?
Av1an - Cross-platform command-line AV1 / VP9 / HEVC / H264 encoding framework with per scene quality encoding
SVT-AV1
vmaf - Perceptual video quality assessment based on multi-method fusion.
NotEnoughAV1Encodes-Qt - Linux GUI for AV1 Encoders
video-to-ascii - It is a simple python package to play videos in the terminal using characters as pixels
SVT-AV1 - Welcome to the GitHub repo for the SVT-AV1! This repo is set to read-only for archiving purposes. Please join us at https://gitlab.com/AOMediaCodec/SVT-AV1. We look forward to seeing you there
TikTokBot - A TikTokBot that downloads trending tiktok videos and compiles them using FFmpeg
redb - An embedded key-value database in pure Rust
encoder-benchmark - A tool to benchmark your hardware's real-time video encoding capabilities.
lossless-cut - The swiss army knife of lossless video/audio editing