On 02/12/2021 01:27 AM, pdr0 wrote:
Mark Filipak (ffmpeg) wrote
Is there something about inputting raw frames that I don't know?
I'm using 'vspipe' to pipe raw frames to 'ffmpeg -i pipe:'.
The vapoursynth script, 'Mark's.vpy', is known good.
The output of vapoursynth is known good.
I've tried to be careful to retain valid PTSs, but apparently have failed.
The output should be around 1200 frames, but 364 frames are dropped.
I've frame stepped through the target, 'Mark's_script_6.mkv', and the
frames that are there are in
the correct order.
The only thing I can guess is that ffmpeg handles 48/1.001fps raw video
frames in such a way that
PTS is not valid or can't be changed with 'setpts=fps=60000/1001'.
Can anyone see an error. Or, lacking an error, does anyone know of a
workaround?
Thanks.
Mark's_script_6.cmd
=====
ECHO from vapoursynth import core>Mark's.vpy
ECHO video = core.ffms2.Source(source='Mark\'s_source.mkv')>>Mark's.vpy
ECHO import havsfunc as havsfunc>>Mark's.vpy
ECHO video = havsfunc.InterFrame(video, Preset="medium", Tuning="smooth",
InputType="2D",
NewNum=48000, NewDen=1001, GPU=True)>>Mark's.vpy
ECHO video.set_output()>>Mark's.vpy
vspipe --y4m Mark's.vpy - | ffmpeg -thread_queue_size 2048 -i pipe:
-filter_complex
"setpts=N*1001/60000/TB, split[1][2], [1]shuffleframes=0 1 2 3 3,
select=not(eq(mod(n\,5)\,4))[3],
[2]tblend=all_expr='if(eq(mod(X,2),mod(Y,2)),TOP,BOTTOM)', shuffleframes=0
1 2 2 3,
select=eq(mod(n\,5)\,4)[4], [3][4]interleave" -i Mark's_source.mkv -map
0:v -map 1:a -codec:v
libx265 -x265-params "crf=16:qcomp=0.60" -codec:a copy -codec:s copy
Mark's_script_6.mkv -y
Are you trying to keep the same frames from vapoursynth output node, but
assign 60000/1001 fps and timestamps instead of 48000/1001 ? (effectively
making it a speed up)
If so, the workaround is : add after the Interframe line
video = core.std.AssumeFPS(video, fpsnum=60000, fpsden=1001)
After your suggested addition to the python script, Mark's.vpy,
With '-filter_complex "setpts=N*1001/60000/TB, split[1][2]...' there are 335
drops.
With '-filter_complex "split[1][2]...' there are 190 drops.
--
I don't have a dog.
And furthermore, my dog doesn't bite.
And furthermore, you provoked him.
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
