In mov muxer, compute avg bitrate in esds

libavformat/movenc.c

@@ -247,10 +247,20 @@ static void putDescr(AVIOContext *pb, int tag, unsigned int size)
     avio_w8(pb, size & 0x7F);
 }
 
+static unsigned compute_avg_bitrate(MOVTrack *track)
+{
+    uint64_t size = 0;
+    int i;
+    for (i = 0; i < track->entry; i++)
+        size += track->cluster[i].size;
+    return size * 8 * track->timescale / track->trackDuration;
+}
+
 static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
 {
     int64_t pos = avio_tell(pb);
     int decoderSpecificInfoLen = track->vosLen ? 5+track->vosLen : 0;
+    unsigned avg_bitrate;
 
     avio_wb32(pb, 0); // size
     ffio_wfourcc(pb, "esds");
@@ -282,11 +292,10 @@ static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
     avio_w8(pb,  track->enc->rc_buffer_size>>(3+16));      // Buffersize DB (24 bits)
     avio_wb16(pb, (track->enc->rc_buffer_size>>3)&0xFFFF); // Buffersize DB
 
-    avio_wb32(pb, FFMAX(track->enc->bit_rate, track->enc->rc_max_rate)); // maxbitrate (FIXME should be max rate in any 1 sec window)
-    if(track->enc->rc_max_rate != track->enc->rc_min_rate || track->enc->rc_min_rate==0)
-        avio_wb32(pb, 0); // vbr
-    else
-        avio_wb32(pb, track->enc->rc_max_rate); // avg bitrate
+    avg_bitrate = compute_avg_bitrate(track);
+    // maxbitrate (FIXME should be max rate in any 1 sec window)
+    avio_wb32(pb, FFMAX3(track->enc->bit_rate, track->enc->rc_max_rate, avg_bitrate));
+    avio_wb32(pb, avg_bitrate);
 
     if (track->vosLen) {
         // DecoderSpecific info descriptor

tests/ref/lavf/mov

-439684b82ccc1fdd24a23392c238ae53 *./tests/data/lavf/lavf.mov
+a901cd05609080e8f5c09ca5da7290f0 *./tests/data/lavf/lavf.mov
 357681 ./tests/data/lavf/lavf.mov
 ./tests/data/lavf/lavf.mov CRC=0x2f6a9b26

tests/ref/vsynth1/mpeg4

-080e75117f8142001b096cd977ba287e *./tests/data/vsynth1/odivx.mp4
+d2405fd9e350854a161f48bc63f49253 *./tests/data/vsynth1/odivx.mp4
 540156 ./tests/data/vsynth1/odivx.mp4
 8828a375448dc5c2215163ba70656f89 *./tests/data/mpeg4.vsynth1.out.yuv
 stddev:    7.97 PSNR: 30.10 MAXDIFF:  105 bytes:  7603200/  7603200

tests/ref/vsynth2/mpeg4

-8ffbe8ce43fe126b12cf9621717d641b *./tests/data/vsynth2/odivx.mp4
+2e3bf184668d4807ae6df0bdceba487b *./tests/data/vsynth2/odivx.mp4
 119809 ./tests/data/vsynth2/odivx.mp4
 90a3577850239083a9042bef33c50e85 *./tests/data/mpeg4.vsynth2.out.yuv
 stddev:    5.34 PSNR: 33.57 MAXDIFF:   83 bytes:  7603200/  7603200