Selur's Little Message Board

Hi there,

I noticed that 2-pass encoding doesn´t wotk for SVT-AV1. The encoding stops immediately after starting the encoding.

I would be grateful if you could look into the problem

Cheers,

David

2pass encoding works fine in my dev version and since according to git, I haven't changed the command line generator for SVT-AV1 since the 3rd of March, I'm not totally sure where the issue is.

What happens if you call:
in a windows command prompt

Cu Selur

Ps.: I'll also send you a link to my current dev version via pm to see whether this also crashes for you. (comes with a newer svt-av1 binary)

Thanks for a fast reply.

Using a cmd, I got a message overlays were not supported. So I disabled overlays and 2-pass worked fine.

The problem I can see now with 2-pass encode is that both passes run very fast. Very probably, settings for the second pass are ignored (speed preset and others)

I have downloaded your developer version and the problem is the same

Attached is a log...

Best,

David

Okay, the error message is:
-> will adjust Hybrid to take this into consideration.

Quote:The problem I can see now with 2-pass encode is that both passes run very fast. Very probably, settings for the second pass are ignored (speed preset and others)

Can't reproduce. For me the second pass is way slower, assuming the preset a slower preset is used.
(tested with preset 3)
Will do some further testing.

Cu Selur

Strange. I am using speed preset 3 as well. 2nd pass is even faster than the first one. 

Switching to preset 1, the speed remains the same. Very fast. 

I am looking into settings if I discover anything...

David

What I tested:
Yes, it's still fast, but 2nd pass takes two times more time than 1st pass.

Funny thing is 'preset' does not really seem to impact the speed at all:

Cu Selur

Ps.: but I can't find a fault in Hybrid regarding the speed,...

I agree,

Preset is ignored but --tbr is respected, so file size changes. Strange, a bug in the encoder? I am using already version 1.6, but it has the same problem

SVT-AV1(1pass variable bitrate) processing started...
starting 2023-06-30@19_26_10_5010_01_video@19:26:12.036 - C:\Work\Video\Test\VBR 2pass.mkv
"C:\Program Files\Hybrid\64bit\SvtAv1EncApp.exe" --input stdin --width 1920 --height 1080 --fps-num 24000 --fps-denom 1001 --input-depth 10 --profile 0 --tile-rows 0 --tile-columns 0 --pass 1 --rc 1 --tbr 20000 --min-qp 0 --aq-mode 1 --stats "C:\Work\Video\Test\VBR 2pass_1.stats" --preset 3 --tune 0 --scm 0 --color-primaries 2 --transfer-characteristics 2 --matrix-coefficients 2 --color-range 0 --output "C:\Work\Video\Test\2023-06-30@19_26_10_5010_01.av1"
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v1.6.0
Svt[info]: SVT [build]  : GCC 13.1.0 64 bit
Svt[info]: LIB Build date: Jun 21 2023 00:14:30
Svt[info]: -------------------------------------------
Svt[warn]: Instance 1: The adaptive quantization mode using segmentation is at a support level only to be available for demos, experimentation, and further development uses and should not be used for benchmarking until fully implemented.
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: preset : Pass 1
Svt[info]: -------------------------------------------
2023-06-30@19_26_10_5010_01_video finished after 00:00:05.931
finished...

SVT-AV1(1pass variable bitrate) processing started...
starting 2023-06-30@19_26_10_5010_03_video@19:26:18.240 - C:\Work\Video\Test\VBR 2pass.mkv
"C:\Program Files\Hybrid\64bit\SvtAv1EncApp.exe" --input stdin --width 1920 --height 1080 --fps-num 24000 --fps-denom 1001 --input-depth 10 --profile 0 --tile-rows 0 --tile-columns 0 --pass 2 --rc 1 --tbr 20000 --min-qp 0 --aq-mode 1 --stats "C:\Work\Video\Test\VBR 2pass_1.stats" --preset 3 --tune 0 --scm 0 --color-primaries 2 --transfer-characteristics 2 --matrix-coefficients 2 --color-range 0 --output "C:\Work\Video\Test\2023-06-30@19_26_10_5010_03.av1"
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v1.6.0
Svt[info]: SVT [build]  : GCC 13.1.0 64 bit
Svt[info]: LIB Build date: Jun 21 2023 00:14:30
Svt[info]: -------------------------------------------
Svt[warn]: Instance 1: The adaptive quantization mode using segmentation is at a support level only to be available for demos, experimentation, and further development uses and should not be used for benchmarking until fully implemented.
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: preset : Pass 2
Svt[info]: -------------------------------------------
2023-06-30@19_26_10_5010_03_video finished after 00:00:15.188
finished...

mkvmerge started...
starting 2023-06-30@19_26_10_5010_05_muxing@19:26:33.721 - C:\Work\Video\Test\VBR 2pass.mkv
"C:\Program Files\Hybrid\64bit\mkvmerge.exe" --ui-language en -o "C:\Work\Video\Test\2023-06-30@19_26_10_5010__04.mkv" --global-tags "C:\Work\Video\Test\mkvtags_2023-06-30@19_26_10_5010__04.xml" -d 0 --default-track 0:yes --track-name 0:"Diamonds of the Night / MPEG-4 AVC @ 35260 kbps" --language 0:cs --default-duration "0:24000/1001fps" --aspect-ratio-factor 0:1/1 --no-chapters --compression -1:none --forced-track 0:yes --field-order 0:0 --no-audio --no-subtitles "C:\Work\Video\Test\2023-06-30@19_26_10_5010_03.av1"
2023-06-30@19_26_10_5010_05_muxing finished after 00:00:00.473
finished...

Thank you,

David

Yeah, seems like something is wrong with the encoder itself, but I'm usually not using svtav1, but the hardware encoder of my NVIDIA or Intel card.

Cu Selur