[FFmpeg-devel] [PATCH] mov.c: reasonable bitrate for fragmented mp4

[Mika Raento]

If using MFRA for timestamps, the stream may start from a large offset
and/or have gaps. With this change we calculate the bitrate based on
frames we've seen.
---
 libavformat/mov.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 80549ec..1444bce 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3943,6 +3943,17 @@ static int mov_read_header(AVFormatContext *s)
         }
     }
 
+    if (mov->use_mfra_for > 0) {
+        for (i = 0; i < s->nb_streams; i++) {
+            AVStream *st = s->streams[i];
+            MOVStreamContext *sc = st->priv_data;
+            if (sc->duration_for_fps > 0) {
+                st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
+                    sc->duration_for_fps;
+            }
+        }
+    }
+
     for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
         if (mov->bitrates[i]) {
             s->streams[i]->codec->bit_rate = mov->bitrates[i];
-- 
1.9.3 (Apple Git-50)