vbr requires version=1 and samplesize=0 per QT spec

untested, but if this doesnt work the issue is likely somewhere else, as iam just chaning the random nonsense we do to what the spec says should be done

Originally committed as revision 5636 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/movenc.c

@@ -353,9 +353,11 @@ static const CodecTag codec_movaudio_tags[] = {
 static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)
 {
     offset_t pos = url_ftell(pb);
+    int vbr=  track->enc->codec_id == CODEC_ID_AAC ||
+              track->enc->codec_id == CODEC_ID_MP3 ||
+              track->enc->codec_id == CODEC_ID_AMR_NB;
     int version = track->mode == MODE_MOV &&
-        (track->enc->codec_id == CODEC_ID_AAC ||
-         track->enc->codec_id == CODEC_ID_MP3 ||
+        (vbr ||
          track->enc->codec_id == CODEC_ID_PCM_S32LE ||
          track->enc->codec_id == CODEC_ID_PCM_S24LE);
 
@@ -375,9 +377,7 @@ static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)
                  to be a good way to get number of bits of audio */
     put_be16(pb, 0x10); /* Reserved */
 
-    if(track->enc->codec_id == CODEC_ID_AAC ||
-       track->enc->codec_id == CODEC_ID_MP3 ||
-       track->enc->codec_id == CODEC_ID_AMR_NB) {
+    if(vbr) {
         put_be16(pb, 0xfffe); /* compression ID (vbr)*/
     } else {
         put_be16(pb, 0); /* compression ID (= 0) */
@@ -387,13 +387,10 @@ static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)
     put_be16(pb, 0); /* Reserved */
 
     if(version == 1) { /* SoundDescription V1 extended info */
-        /* Parameters tested on quicktime 6.5, 7 */
-        if (track->enc->codec_id == CODEC_ID_MP3)
-            track->sampleSize = 666;
-        if (track->enc->codec_id == CODEC_ID_AAC)
-            track->sampleSize = 2;
+        if (vbr)
+            track->sampleSize = 0;
         put_be32(pb, track->enc->frame_size); /* Samples per packet */
-        put_be32(pb, track->sampleSize / 2); /* Bytes per packet */
+        put_be32(pb, track->sampleSize / track->enc->channels); /* Bytes per packet */
         put_be32(pb, track->sampleSize); /* Bytes per frame */
         put_be32(pb, 2); /* Bytes per sample */
     }