Depending on the filters used the filtergraph can produce trailing data
after feeding it the last input frame. Update the example to include the
necessary loop for draining the filtergrap.
Signed-off-by: Tobias Rapp <t.r...@noa-archive.com>
---
doc/examples/decode_filter_video.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/doc/examples/decode_filter_video.c
b/doc/examples/decode_filter_video.c
index 454c192..a57e6df 100644
--- a/doc/examples/decode_filter_video.c
+++ b/doc/examples/decode_filter_video.c
@@ -276,6 +276,25 @@ int main(int argc, char **argv)
}
av_packet_unref(packet);
}
+ if (ret == AVERROR_EOF) {
+ /* signal EOF to the filtergraph */
+ if (av_buffersrc_add_frame_flags(buffersrc_ctx, NULL, 0) < 0) {
+ av_log(NULL, AV_LOG_ERROR, "Error while closing the
filtergraph\n");
+ goto end;
+ }
+
+ /* pull remaining frames from the filtergraph */
+ while (1) {
+ ret = av_buffersink_get_frame(buffersink_ctx, filt_frame);
+ if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
+ break;
+ if (ret < 0)
+ goto end;
+ display_frame(filt_frame, buffersink_ctx->inputs[0]->time_base);
+ av_frame_unref(filt_frame);
+ }
+ }
+
end:
avfilter_graph_free(&filter_graph);
avcodec_free_context(&dec_ctx);
--
2.7.4
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