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avfilter/avfilter: always forward request frame in filter_activate_default

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Even if all inputs are blocked an activate callback should request a frame on
some if its inputs if a frame is requested on any of its outputs.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2025-06-22 15:39:29 +02:00
parent a85835bfb8
commit 4440e499ba
1 changed files with 11 additions and 0 deletions
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11
libavfilter/avfilter.c
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@ -1283,6 +1283,11 @@ static int filter_activate_default(AVFilterContext *filter)
return request_frame_to_filter(filter->outputs[i]);
}
}
for (i = 0; i < filter->nb_outputs; i++) {
FilterLinkInternal * const li = ff_link_internal(filter->outputs[i]);
if (li->frame_wanted_out)
return request_frame_to_filter(filter->outputs[i]);
}
return FFERROR_NOT_READY;
}
@ -1416,6 +1421,12 @@ static int filter_activate_default(AVFilterContext *filter)
Rationale: checking frame_blocked_in is necessary to avoid requesting
repeatedly on a blocked input if another is not blocked (example:
[buffersrc1][testsrc1][buffersrc2][testsrc2]concat=v=2).
- If an output has frame_wanted_out > 0 call request_frame().
Rationale: even if all inputs are blocked an activate callback should
request a frame on some if its inputs if a frame is requested on any of
its output.
*/
int ff_filter_activate(AVFilterContext *filter)