[Cin] SVT-AV1 encoding quite fast on x86_64

Fri Dec 29 11:56:38 CET 2023

пт, 29 дек. 2023 г., 05:01 Terje J. Hanssen <terjejhanssen at gmail.com>:

>
>
> 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.
>

well, lack of correct (display) aspect ratio on output, as well as
distorted sound is concerning!

Can you try another audio encoder, and may be manually set 'format'
parameters, if container-level aspect ratio still not set up automatically?

>
>
>
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