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vsrc_buffer: when no frame is available, return an error instead of segfaulting.
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@ -162,7 +162,7 @@ static int request_frame(AVFilterLink *link)
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if (!av_fifo_size(c->fifo)) {
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av_log(link->src, AV_LOG_ERROR,
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"request_frame() called with no available frame!\n");
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//return -1;
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return AVERROR(EINVAL);
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}
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av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
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