lavfi: add libavfilter/avcodec.h and avfilter_copy_frame_props()

avfilter_copy_frame_props() avoids code duplication and increases
robustness.

The added files libavfilter/avcodec.[ch] are used for containing
utilities useful for gluing togheter libavfilter and libavcodec.

1 files changed, 3 insertions, 2 deletions

diff --git a/ffplay.c b/ffplay.c
index e57161fc21..d76ea5b69d 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -40,6 +40,7 @@
 #include "libavcodec/avfft.h"
 
 #if CONFIG_AVFILTER
+# include "libavfilter/avcodec.h"
 # include "libavfilter/avfilter.h"
 # include "libavfilter/avfiltergraph.h"
 #endif
@@ -1686,9 +1687,9 @@ static int input_request_frame(AVFilterLink *link)
     }
     av_free_packet(&pkt);
 
+    avfilter_copy_frame_props(picref, priv->frame);
     picref->pts = pts;
-    picref->pos = priv->frame->pkt_pos;
-    picref->video->sample_aspect_ratio = priv->frame->sample_aspect_ratio;
+
     avfilter_start_frame(link, picref);
     avfilter_draw_slice(link, 0, link->h, 1);
     avfilter_end_frame(link);