[Cin] SVT-AV1 encoding quite fast on x86_64

Fri Dec 29 03:01:21 CET 2023

Den 17.12.2023 00:05, skrev Andrew Randrianasulu:
>
>
> пт, 15 дек. 2023 г., 21:10 Terje J. Hanssen via Cin 
> <cin at lists.cinelerra-gg.org>:
>
>
>
>     Anyway, apparently SVT-AV1 libsvtav1 shines as the superiour
>     fastest and simple to use CPU based AV1 encoder (before GPU hwaccels)
>
>
> After rebuilding SVT-AV1 on termux for Neon acceleration I tried three 
> variations of same file:
>
> du -h av1-1.8.0*
> 5.0M    av1-1.8.0-pr12.webm
> 4.3M    av1-1.8.0-pr2.webm
> 4.6M    av1-1.8.0.webm
>
> all on crf 30
>
> ffmpeg -i 20081103140154.m2t -c:v libsvtav1 -an -preset 2 -crf 30  
> av1-1.8.0-pr2.webm
>
> this one run at 0.2 fps
>
> ffmpeg -i 20081103140154.m2t -c:v libsvtav1 -an -preset 12 -crf 30  
> av1-1.8.0-pr12.webm
>
> this one run up to 9.4 fps!
>
> ffmpeg -i 20081103140154.m2t -c:v libsvtav1 -an -preset 6 -crf 30  
> av1-1.8.0.webm
>
> and this one run  at 1.3 fps.
>
> all files encoded from same input:
>
> Stream #0:0[0x810]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), 
> yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 25000 
> kb/s, 25 fps, 25 tbr, 90k tbn
>
> So, I guess on aarch64 tablet this one definitely not as fast as on 
> desktop (x86_64) Intel.
>
>

AV1 Encoding/Rendering:
======================

To compare encoding with FFmpeg/SVT-AV1 v. 1.7.0 and rendering with the 
current CinGG/AOM-AV1 (v. 3.1.1?), I used a medium length 1080i HDV clip 
(ca. 7 min duration) as input file:
1,3G    hdv07_05.m2t

239M    hdv07_05_m2t_svt-av1_pr10.webm
ffmpeg -i hdv07_05.m2t -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis 
hdv07_05_m2t_svt-av1_pr10.webm
frame=10240 fps= 68 q=27.0 Lsize=  244069kB time=00:06:58.24 
bitrate=4780.5kbits/s speed=2.78x

235M    hdv07_05_cingg_aom-av1.webm
Rendering with CinGG/AOM-AV1
Rendering took 0:37:06 = 2226 sek
FPS=10240/2226=4.6

Rendering speed results:
------------------------
68 FPS vs 4.6 FPS

FFplay playback:
===============

hdv07_05_m2t_svt-av1_pr10.webm
------------------------------
ffplay -hide_banner hdv07_05_m2t_svt-av1_pr10.webm
[libdav1d @ 0x7fe318004880] libdav1d 1.3.0    0KB sq=    0B f=0/0
Input #0, matroska,webm, from 'hdv07_05_m2t_svt-av1_pr10.webm':
   Metadata:
     ENCODER         : Lavf60.3.100
   Duration: 00:06:58.28, start: 0.000000, bitrate: 4780 kb/s
   Stream #0:0: Video: av1 (Main), yuv420p(tv, bt709), 1440x1080, SAR 
4:3 DAR 16:9, 25 fps, 25 tbr, 1k tbn
     Metadata:
       ENCODER         : Lavc60.3.100 libsvtav1
       DURATION        : 00:06:58.283000000
   Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp
     Metadata:
       ENCODER         : Lavc60.3.100 libvorbis
       DURATION        : 00:06:57.939000000
[libdav1d @ 0x7fe3180d5b80] libdav1d 1.3.0
   20.51 A-V: -0.032 fd=   0 aq=   12KB vq=  310KB sq=    0B f=0/0

hdv07_05_cingg_aom-av1.webm
----------------------------
ffplay -hide_banner hdv07_05_cingg_aom-av1.webm
[libdav1d @ 0x7f3650004640] libdav1d 1.3.0    0KB sq=    0B f=0/0
Input #0, matroska,webm, from 'hdv07_05_cingg_aom-av1.webm':f=0/0
   Metadata:
     ENCODER         : Lavf60.16.100
   Duration: 00:06:58.08, start: 0.000000, bitrate: 4708 kb/s
   Stream #0:0: Video: av1 (Main), yuv420p(tv, bt470bg/unknown/unknown), 
1440x1080, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn
     Metadata:
       DURATION        : 00:06:58.043000000
   Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp
     Metadata:
       DURATION        : 00:06:58.082000000
[libdav1d @ 0x7f36500da540] libdav1d 1.3.0
   24.95 A-V: -0.008 fd=   3 aq=   21KB vq=  583KB sq=    0B f=0/0

VLC Playback (copied codec info from GUI Tool tab)
============

vlc hdv07_05_m2t_svt-av1_pr10.webm
----------------------------------
Stream 0
     Codec: AOMedia's AV1 Video (av01)
     Type: Video
     Video resolution: 1440x1080
     Buffer dimensions: 1536x1152
     Frame rate: 25
     Decoded format: Planar 4:2:0 YUV
     Orientation: Top left
     Color primaries: ITU-R BT.709
     Color transfer function: ITU-R BT.709
Stream 1
     Codec: Vorbis Audio (vorb)
     Type: Audio
     Channels: Stereo
     Sample rate: 48000 Hz
     Bits per sample: 32
     Bitrate: 112 kb/s
     encoder: Lavc60.3.100

vlc hdv07_05_cingg_aom-av1.webm
-------------------------------
Stream 0
     Codec: AOMedia's AV1 Video (av01)
     Type: Video
     Video resolution: 1440x1080
     Buffer dimensions: 1536x1152
     Frame rate: 25
     Decoded format: Planar 4:2:0 YUV
     Orientation: Top left
     Color space: ITU-R BT.601 Range
Stream 1
     Codec: Vorbis Audio (vorb)
     Type: Audio
     Channels: Stereo
     Sample rate: 48000 Hz
     Bits per sample: 32
     Bitrate: 112 kb/s
     encoder: Lavc60.31.102

Playback results:
-----------------

hdv07_05_m2t_svt-av1_pr10.webm
------------------------------
FFplay and VLC: Correct playback of HDV 16:9 (DAR) Video and correct Audio
BT.709 Colors should be correct for HD(V) video

hdv07_05_cingg_aom-av1.webm
----------------------------
FFplay and VLC: wrong playback of HDV 4:3 (DAR) Video,
and som screeching (scratch) sound on Audio
BT.601 colors is seemingly for (older) SD video
That said, I just loaded the HDV clip in Cin-GG without change of the 
default Preferences,
so this can probably be corrected/tuned.

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