вс, 17 дек. 2023 г., 22:44 Terje J. Hanssen <[email protected]>:

Den 17.12.2023 13:43, skrev Andrew Randrianasulu:

вс, 17 дек. 2023 г., 15:29 Terje J. Hanssen <[email protected]>:

...

Den 17.12.2023 00:05, skrev Andrew Randrianasulu:

пт, 15 дек. 2023 г., 21:10 Terje J. Hanssen via Cin < [email protected]>:

...

Den 14.12.2023 12:25, skrev Terje J. Hanssen:

First, a summary from another current post and thread: https://lists.cinelerra-gg.org/pipermail/cin/2023-December/007430.html

I will add the re-encoded sample *SD DV *file using ffmpeg SVT-AV1, as I was positive surprised how much faster (preset 10 about 25 sec) it was than rendering AV1 with CinGG (libaom?) . I've tested three presets: 8, 10 and 12. "Useable visible quality" for all.

ffmpeg -i dv01_07.dv -c:v libsvtav1 -preset 8 -crf 35 -c:a libvorbis dv01_07_svt-av1_pr8.webm frame= 2832 fps= 66 q=35.0 Lsize= 28836kB time=00:01:53.26 bitrate=2085.6kbits/s speed=2.65x

ffmpeg -i dv01_07.dv -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis dv01_07_svt-av1_pr10.webm frame= 2832 *fps=112* q=35.0 Lsize= 34419kB time=00:01:53.26 bitrate=2489.4kbits/s speed=4.47x

ffmpeg -i dv01_07.dv -c:v libsvtav1 -preset 12 -crf 35 -c:a libvorbis dv01_07_svt-av1_pr12.webm frame= 2832 fps=262 q=35.0 Lsize= 35913kB time=00:01:53.26 bitrate=2597.5kbits/s speed=10.5x

The speed of SVT-AV1 encoding seems for me to be quite useable, at least for personal use.

As a reference to compare the SVT-AV1 results above, I've also tried to encode the same input file using libaom-av1 and librav1e with simple or none (default) parameters. Other, optimal tuned parameters may possibly change the unsuccesful results here. Seemingly something have to be wrong here, as I had to quit these hopeless SLOW encoding attemps after a while:

ffmpeg -i dv01_07.dv -c:v libaom-av1 -crf 30 -c:a libvorbis dv01_07_libaom-av1.webm ^C^Ze= 35 fps=0.1 q=0.0 size= 5kB time=00:00:03.00 bitrate= 13.7kbits/s speed=0.00748x

ffmpeg -i dv01_07.dv -c:v librav1e -c:a libvorbis dv01_07_librav1e.webm frame= 471 fps=1.9 q=-0.0 Lsize= 4864kB time=00:00:19.11 bitrate=2084.4kbits/s speed=0.0791x

The CPU (i7 quad-cores 8 threads) utilization was here between 100-200%, while I think it ran at 700%+ for SVT-AV1.

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.

I also noticed this post 1 (yr. ago) on reddit, "SVT-AV1 on ARM" https://www.reddit.com/r/AV1/comments/z9fo51/svtav1_on_arm/

---------------------

So, regarding my initial "FHD (yuv422p10le)" below, where the audio was lost during transcode from .mov to AV1 .webm: I have tried to interpret and experiment with FFMpeg's "Selecting streams with the -map option" https://trac.ffmpeg.org/wiki/Map

ffprobe tells pcm_s24leand 16 channels in the Audio stream of the PreRes input file hd01.mov:

Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709/unknown/unknown, top coded first (swapped)), 1920x1080, 182130 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2500 tbn, 2500 tbc (default) Stream #0:1(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 16 channels, s32 (24 bit), 18432 kb/s (default)

VLC playback the audio ok for the input file. So I tried a similar stream map for transcode, but without success: Still no audio.

Is there possibility that you just hear 'empty'/silent channels? Are they all contain some audio, or some are silent?

The hd01.mov 10-bit input file was initially back in 2016 recorded directly from my Sony HDV camera via HDMI out to a BM Hyperdeck shuttle 2. The camcorder has only stereo audio so I think the other streams may be empty, yes.

You can always try and load file into cinelerra-gg and see where audio was .... i think.

VLC was not able to playback audio in 2016 from the ProRes.mov file, but does it fine now, while not from the av1.webm file. Attach a VLC screenshot clip of each. https://lists.cinelerra-cv.org/pipermail/cinelerra/2016q1/thread.html#4083

Obviously I'm wrong applying this stream map numbering (just in case

...

someone see the fault without using much energy on it)?

example from "man ffmpeg" says:

=====

For example, assuming INPUT is a stereo audio file, you can switch the two audio channels with the following command:

ffmpeg -i INPUT -map_channel 0.0.1 -map_channel 0.0.0 OUTPUT

If you want to mute the first channel and keep the second:

ffmpeg -i INPUT -map_channel -1 -map_channel 0.0.1 OUTPUT

The order of the "-map_channel" option specifies the order of the channels in the output stream. The output channel layout is guessed from the number of channels mapped (mono if one "-map_channel", stereo if two, etc.). Using "-ac" in combination of "-map_channel" makes the channel gain levels to be updated if input and output channel layouts don't match (for instance two "-map_channel" options and "-ac 6").

=====

But may be you better to ask on ffmpeg-users mail list, not sure if anyone was dealing with input files with such high number of channels there recently, but it feels a bit more populated than our corner!

Maybe, if I explore BM Hyperdeck Shuttle to work again later on and . Last time I tried I got issue with the HFS+ SSDs mounted on Linux.

...

ffmpeg -i hd01.mov -map 0:v -map 0:a -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hd01_mov_svt-av1_pr10.webm

...

...

Ref: https://ottverse.com/analysis-of-svt-av1-presets-and-crf-values/

Here I add my latest test results for a *HDV (fps=69)* and a *FHD (fps=51)* video clip.

2.0G hdv01_04.m2t 383M hdv01_04_m2t_svt-av1_pr10.webm

1.7G hd01.mov 20M hd01_mov_svt-av1_pr10.webm

*HDV* (yuv420p) -------

*ffprobe -hide_banner hdv01_04.m2t* [mpeg2video @ 0x560c32966340] Invalid frame dimensions 0x0. Last message repeated 7 times [mpegts @ 0x560c32960c00] PES packet size mismatch [mpegts @ 0x560c32960c00] Packet corrupt (stream = 1, dts = 295380000). [mpegts @ 0x560c32960c00] Could not find codec parameters for stream 2 (Unknown: none ([160][0][0][0] / 0x00A0)): unknown codec Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options [mpegts @ 0x560c32960c00] Could not find codec parameters for stream 3 (Unknown: none ([161][0][0][0] / 0x00A1)): unknown codec Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, mpegts, from 'hdv01_04.m2t': Duration: 00:10:57.34, start: 2624.856000, bitrate: 26134 kb/s Program 100 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 Side data: cpb: bitrate max/min/avg: 25000000/0/0 buffer size: 7340032 vbv_delay: N/A Stream #0:1[0x814]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s Stream #0:2[0x815]: Unknown: none ([160][0][0][0] / 0x00A0) Stream #0:3[0x811]: Unknown: none ([161][0][0][0] / 0x00A1) Unsupported codec with id 0 for input stream 2 Unsupported codec with id 0 for input stream 3 --------------

*ffmpeg -i hdv01_04.m2t -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hdv01_04_m2t_svt-av1_pr10.webm* frame=16420 *fps= 69* q=34.0 Lsize= 391289kB time=00:10:57.36 bitrate=4876.2kbits/s speed=2.77x

*ffprobe -hide_banner hdv01_04_m2t_svt-av1_pr10.webm* [libdav1d @ 0x562b42305540] libdav1d 1.3.0 Input #0, matroska,webm, from 'hdv01_04_m2t_svt-av1_pr10.webm': Metadata: ENCODER : Lavf60.3.100 Duration: 00:10:57.40, start: 0.000000, bitrate: 4875 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 : 00:10:57.403000000 Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp Metadata: ENCODER : Lavc60.3.100 libvorbis DURATION : 00:10:57.171000000 [libdav1d @ 0x562b42361540] libdav1d 1.3.0

*FHD* *(*yuv422p10le*)* -----

*ffprobe hd01.mov* ..... Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hd01.mov': Metadata: creation_time : 2016-02-23T23:49:21.000000Z Duration: 00:01:11.28, start: 0.000000, bitrate: 200496 kb/s Stream #0:0[0x1](eng): Video: prores (HQ) (apch / 0x68637061), *yuv422p10le(bt709*, top coded first (swapped)), 1920x1080, 182130 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2500 tbn (default) Metadata: creation_time : 2016-02-23T23:49:21.000000Z handler_name : Apple Video Media Handler vendor_id : appl encoder : Apple ProRes 422 (HQ) Stream #0:1[0x2](eng): *Audio*: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 16 channels, s32 (24 bit), 18432 kb/s (default) Metadata: creation_time : 2016-02-23T23:49:21.000000Z handler_name : Apple Sound Media Handler vendor_id : [0][0][0][0]

* ffmpeg -i hd01.mov -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hd01_mov_svt-av1_pr10.webm* frame= 1781 *fps= 51* q=35.0 Lsize= 19732kB time=00:01:11.26 bitrate=2268.3kbits/s speed=2.03x

*ffprobe -hide_banner hdv01_04_m2t_svt-av1_pr10.webm* [libdav1d @ 0x562b42305540] libdav1d 1.3.0 Input #0, matroska,webm, from 'hdv01_04_m2t_svt-av1_pr10.webm': Metadata: ENCODER : Lavf60.3.100 Duration: 00:10:57.40, start: 0.000000, bitrate: 4875 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 : 00:10:57.403000000 Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp Metadata: ENCODER : Lavc60.3.100 libvorbis DURATION : 00:10:57.171000000

An issue is that the audio was lost during the conversion from .mov to .webm, so I attach the full ffmpeg output below. (possibly a mis-match regarding the audio stream #numbers ?)

*ffmpeg -i hd01.mov -c:v libsvtav1 -preset 10 -crf 35 -c:a libvorbis hd01_mov_svt-av1_pr10.webm* ... Guessed Channel Layout for Input Stream #0.1 : hexadecagonal Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hd01.mov': Metadata: creation_time : 2016-02-23T23:49:21.000000Z Duration: 00:01:11.28, start: 0.000000, bitrate: 200496 kb/s Stream #0:0[0x1](eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(bt709, top coded first (swapped)), 1920x1080, 182130 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2500 tbn (default) Metadata: creation_time : 2016-02-23T23:49:21.000000Z handler_name : Apple Video Media Handler vendor_id : appl encoder : Apple ProRes 422 (HQ) Stream #0:1[0x2](eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 16 channels, s32 (24 bit), 18432 kb/s (default) Metadata: creation_time : 2016-02-23T23:49:21.000000Z handler_name : Apple Sound Media Handler vendor_id : [0][0][0][0] Stream mapping: Stream #0:0 -> #0:0 (prores (native) -> av1 (libsvtav1)) Stream #0:1 -> #0:1 (pcm_s24le (native) -> vorbis (libvorbis)) Press [q] to stop, [?] for help Svt[info]: ------------------------------------------- Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v1.7.0 Svt[info]: SVT [build] : GCC 13.2.1 20230912 [revision b96e66fd4ef3e36983969fb8cdd1956f551a074b] 64 bit Svt[info]: LIB Build date: Nov 3 2023 00:00:00 Svt[info]: ------------------------------------------- Svt[info]: Number of logical cores available: 8 Svt[info]: Number of PPCS 59 Svt[info]: [asm level on system : up to avx2] Svt[info]: [asm level selected : up to avx2] Svt[info]: ------------------------------------------- Svt[info]: SVT [config]: main profile tier (auto) level (auto) Svt[info]: SVT [config]: width / height / fps numerator / fps denominator : 1920 / 1080 / 25 / 1 Svt[info]: SVT [config]: bit-depth / color format : 10 / YUV420 Svt[info]: SVT [config]: preset / tune / pred struct : 10 / PSNR / random access Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type : 161 / 16 / key frame Svt[info]: SVT [config]: BRC mode / rate factor : CRF / 35 Svt[info]: ------------------------------------------- Output #0, webm, to 'hd01_mov_svt-av1_pr10.webm': Metadata: encoder : Lavf60.3.100 Stream #0:0(eng): Video: av1, yuv420p10le(tv, bt709, top coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 1k tbn (default) Metadata: creation_time : 2016-02-23T23:49:21.000000Z handler_name : Apple Video Media Handler vendor_id : appl encoder : Lavc60.3.100 libsvtav1 Stream #0:1(eng): Audio: vorbis, 48000 Hz, hexadecagonal, fltp (default) Metadata: creation_time : 2016-02-23T23:49:21.000000Z handler_name : Apple Sound Media Handler vendor_id : [0][0][0][0] encoder : Lavc60.3.100 libvorbis frame= 1781 fps= 51 q=35.0 Lsize= 19732kB time=00:01:11.26 bitrate=2268.3kbits/s speed=2.03x video:18635kB audio:1059kB subtitle:0kB other streams:0kB global headers:3kB muxing overhead: 0.193378%

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