On 220627-10:03+0200, Andrea paz via Cin wrote:
> About AV1 and ffmpeg there is also this commit:
> https://github.com/FFmpeg/FFmpeg/commit/a44fba0b5b3b4090f9238751736198ddd1f0f1d5
> For now, AV1 is not a convenient codec for me, given its poor
> performance in both decoding and encoding.
> --
> Cin mailing list
> Cin@lists.cinelerra-gg.org
> https://lists.cinelerra-gg.org/mailman/listinfo/cin
And the thread started when developer Andrew gave:
https://groups.google.com/a/webmproject.org/g/webm-discuss/c/D5kHbR8-GaU
which indeed has a lot of AV1 (case insensitive).
And it is AV1:
https://trac.ffmpeg.org/wiki/Encode/AV1
I've recently had huge losses of quality with VP9 encoding directly in Cinerella, via FFmpeg of course. Once I reverted to encode to MP4, quality was fine again, and the size compared to original, smaller (well, certainly not so small as AV1, far from, though).
So I'm afraid, VP9 is unacceptably poor perfomance. (Or I have not been able to set the right options, although I tweaked quite a lot; I do want good compression, and I found no such options to retain quality while giving not very large WEBM file to publish online... To the contrary, AV1 can really really do that!)
Well, you tried two-pass encoding? I mostly encode screencasts and there vp9 as presented by Cingg presets works reasonably well for my limited eyesight ..
I'm familiar enough with what AV1 codec practically entails. It's been huge computing power needed for even short encodings. Such as, the shortest of the videos (27s):
https://croatiafidelis.hr/2021/rpi-CM4/VID_20210213_150554_CM4IO_only_on_PSU_voltage_measurement_RED_LED_and_BEEPS.webm
on https://croatiafidelis.hr/2021/rpi-CM4/210213-150554.php (not all players/browsers can play it)
It's the future probably.
I only have:
# cat /proc/cpuinfo
[...]
model name : AMD Ryzen 7 PRO 4750G with Radeon Graphics
[...]
which is modest but is not a feeble processor.
Do these changes make any really significant speedup for encoding AV1, will there be any significanlty smaller power requirements for encoding AV1, with FFmpeg (in Cinelerra and otherwise)? Or will it be practically off the table with non-top-powerful processors like mine, for any footage that's not just very short clips?
Well, speed difference said to be in 10-20 percent range relative to previous libaom release ...so ...nothing groundbreaking?
There are supposedly faster encoders (ra1ve and svt-av1 ? ) but their quality said to be less than libaom's ...
VDPAU is decoing-only interface, so for encoding you probably need very new and costly intel hardware and fresh libva ..
No sign of av1 encoding support in mesa (for AMD hardware) so far ....