ffmpeg: move flushing the queued frames to configure_filtergraph()

This is a more appropriate place for it, and will also be useful in the
following commit.

This merges Libav commit d2e56cf. It was previously skipped.

Signed-off-by: wm4 <nfxjfg@googlemail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/ffmpeg_filter.c b/ffmpeg_filter.c
index f21a8c85f8..4d9a4e2eb8 100644
--- a/ffmpeg_filter.c
+++ b/ffmpeg_filter.c
@@ -1117,6 +1117,17 @@ int configure_filtergraph(FilterGraph *fg)
                                          ost->enc_ctx->frame_size);
     }
 
+    for (i = 0; i < fg->nb_inputs; i++) {
+        while (av_fifo_size(fg->inputs[i]->frame_queue)) {
+            AVFrame *tmp;
+            av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
+            ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
+            av_frame_free(&tmp);
+            if (ret < 0)
+                return ret;
+        }
+    }
+
     return 0;
 }