[FFmpeg-devel] [PATCH 12/12] avfilter/ffmpeg_filter: rate control all filter graphs

[Marton Balint]

On Thu, 26 Jun 2025, Marton Balint wrote:

>
>
> On Wed, 25 Jun 2025, Michael Niedermayer wrote:
>
>>  On Tue, Jun 24, 2025 at 09:23:10PM +0200, Marton Balint wrote:
>>>  It was never reliable to detect if a filtergraph have sources, because a
>>>  filter
>>>  can act as a source only after some time, for example the loop filter.
>>>
>>>  So it is better to remove the source detection entirely and always give
>>>  the
>>>  scheduler an oppurtunity to stop processing.
>>>
>>>  Fixes ticket #11604.
>>>
>>>  Signed-off-by: Marton Balint <cus at passwd.hu>
>>>  ---
>>>   fftools/ffmpeg_filter.c | 25 ++++---------------------
>>>   1 file changed, 4 insertions(+), 21 deletions(-)
>>
>>  breaks: (infinite loop)
>>
>>  ./ffmpeg -y -i tickets//507/avdesync_cut.avi -bitexact -af
>>  aresample=first_pts=-50000 -r 24000/1001 -t 145 out.avi
>>
>>  sample seems attached to the ticket: https://trac.ffmpeg.org/ticket/507
>
> Seems like an issue already present before the patch series if "sources" were 
> used, because this hangs for me even without the patch series:
>
> ffmpeg -threads 16 -i avdesync_cut.avi -bitexact -af 
> aresample=first_pts=100,apad=pad_len=1000 -f null none
>
> I have no better idea than to drop this patch until this is figured out, 
> because this issue would become more common if all filters are going to be 
> treated as sources...

Will apply the series except this last patch....

Regards,
Marton