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vf_thumbnail: forward request_frame at least once.

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The current version relied on poll_frame to request
the very first frame, that would not work if the
surrounding code does not call poll_frame.
This commit is contained in:
Nicolas George 2012-03-11 00:19:50 +01:00
parent 463705bd1c
commit 69174fad73
1 changed files with 2 additions and 2 deletions
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4
libavfilter/vf_thumbnail.c
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@ -176,11 +176,11 @@ static int request_frame(AVFilterLink *link)
/* loop until a frame thumbnail is available (when a frame is queued,
* thumb->n is reset to zero) */
while (thumb->n) {
do {
int ret = avfilter_request_frame(link->src->inputs[0]);
if (ret < 0)
return ret;
}
} while (thumb->n);
return 0;
}