OpenAPV ?

[Selur]

Seeing that https://github.com/m-ab-s/media-autobuild_suite builds:
OpenAPV (https://github.com/AcademySoftwareFoundation/openapv) which like ProRes seems to aim for 'Perceptually lossless video quality', I was wondering whether someone compared it to ProRes or similar formats?

Cu Selur

[Z2697]

There haven't been a detailed comparison by fellow forum members (yet).
https://forum.doom9.org/showthread.php?t=185868

[Jamaika]

Hugely — it’s the reason a file is small or large. In general, a newer compressed codec will be more efficient and have higher image quality than an older codec at the same data rate. Another way to look at it: older compressed codecs need to use higher data rates to achieve the same image quality as newer ones. But also remember that different encoding apps can achieve different results.

[GeoffreyA]

Using an FFV1 YUV420P8 copy of Sol Levante:


ffmpeg -i sol.mkv -c:v prores prores.mkv
ffmpeg -i sol.mkv -c:v apv apv.mkv

APV = 1.86 GB
ProRes = 3.7 GB
FFV1 = 4.6 GB

With another source, I noticed that APV had mild compression noise, the default setting being too strong. I think it can be adjusted but haven't gone into that. Both APV and ProRes forced YUV422P10 as their default pixel format.

[Jamaika]

ProRes forced YUV422P10 as their default pixel format.
OpenAPV and ProRes isn't 8bit, yuv420p.
https://en.wikipedia.org/wiki/Apple_ProRes