вт, 28 июн. 2022 г., 16:41 Miroslav Rovis <[email protected]>:
> 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 > > [email protected] > > 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 .. https://www.phoronix.com/scan.php?page=news_item&px=VA-API-libva-2.14-Released No sign of av1 encoding support in mesa (for AMD hardware) so far .... > Regards! > > -- > Miroslav Rovis > Zagreb, Croatia > https://www.CroatiaFidelis.hr > my PGP-key: > https://www.croatiafidelis.hr/FCF13245ED247DCE443855B7EA9884884FBAF0AE.asc >
-- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
