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ffmpeg: delay processing of subtitles before filters are initialized

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If a subtitle packet came before the first video frame could be fully
decoded, the subtitle packet would get discarded. This puts the subtitle
into a queue instead, and processes it once the attached filter graph is
initialized.
This commit is contained in:
wm4
2017-03-02 16:01:01 +01:00
parent 736f4af4fe
commit 7dd44cde2a
3 changed files with 44 additions and 3 deletions
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13
ffmpeg_filter.c
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@ -1137,6 +1137,19 @@ int configure_filtergraph(FilterGraph *fg)
}
}
/* process queued up subtitle packets */
for (i = 0; i < fg->nb_inputs; i++) {
InputStream *ist = fg->inputs[i]->ist;
if (ist->sub2video.sub_queue && ist->sub2video.frame) {
while (av_fifo_size(ist->sub2video.sub_queue)) {
AVSubtitle tmp;
av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
sub2video_update(ist, &tmp);
avsubtitle_free(&tmp);
}
}
}
return 0;
}