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fftools/ffmpeg_filter: always reap all available frames before requesting new ones

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alfilter_graph_request_oldest() might return EAGAIN and produce a frame on not
the oldest sink.

Fixes ticket #11597.
Fixes excessive frame buffering in #10959.
Fixes excessive frame buffering in #11366.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2025-06-20 19:59:11 +02:00
parent af189e424b
commit 42bcbdd456
1 changed files with 16 additions and 15 deletions
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31
fftools/ffmpeg_filter.c
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@ -2669,6 +2669,22 @@ static int read_frames(FilterGraph *fg, FilterGraphThread *fgt,
while (fgp->nb_outputs_done < fg->nb_outputs) {
int ret;
/* Reap all buffers present in the buffer sinks */
for (int i = 0; i < fg->nb_outputs; i++) {
OutputFilterPriv *ofp = ofp_from_ofilter(fg->outputs[i]);
ret = 0;
while (!ret) {
ret = fg_output_step(ofp, fgt, frame);
if (ret < 0)
return ret;
}
}
// return after one iteration, so that scheduler can rate-control us
if (did_step && fgp->have_sources)
return 0;
ret = avfilter_graph_request_oldest(fgt->graph);
if (ret == AVERROR(EAGAIN)) {
fgt->next_in = choose_input(fg, fgt);
@ -2684,21 +2700,6 @@ static int read_frames(FilterGraph *fg, FilterGraphThread *fgt,
}
fgt->next_in = fg->nb_inputs;
// return after one iteration, so that scheduler can rate-control us
if (did_step && fgp->have_sources)
return 0;
/* Reap all buffers present in the buffer sinks */
for (int i = 0; i < fg->nb_outputs; i++) {
OutputFilterPriv *ofp = ofp_from_ofilter(fg->outputs[i]);
ret = 0;
while (!ret) {
ret = fg_output_step(ofp, fgt, frame);
if (ret < 0)
return ret;
}
}
did_step = 1;
}