reserved2[9] = (u_int8_t)HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->amixdown);
MP4SetTrackBytesProperty(m->file, mux_data->track, "mdia.minf.stbl.stsd.mp4a.reserved2", reserved2, sizeof(reserved2));
+ /* Set the audio track alternate group */
+ MP4SetTrackIntegerProperty(m->file, mux_data->track, "tkhd.alternate_group", 1);
+
/* If we ever upgrade mpeg4ip, the line above should be replaced with the line below.*/
// MP4SetTrackIntegerProperty(m->file, mux_data->track, "mdia.minf.stbl.stsd.mp4a.channels", (u_int16_t)HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->amixdown));