[FFmpeg-devel] [PATCH 1/2] examples/filtering_audio: added loop for draining the filtergraph

[Tobias Rapp]

Signed-off-by: Tobias Rapp <t.rapp at noa-archive.com>
---
 doc/examples/filtering_audio.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/doc/examples/filtering_audio.c b/doc/examples/filtering_audio.c
index 18d6ca2..070d0cb3 100644
--- a/doc/examples/filtering_audio.c
+++ b/doc/examples/filtering_audio.c
@@ -280,6 +280,25 @@ 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;
+            print_frame(filt_frame);
+            av_frame_unref(filt_frame);
+        }
+    }
+
 end:
     avfilter_graph_free(&filter_graph);
     avcodec_free_context(&dec_ctx);
-- 
2.7.4