> > > > So it seems to be a matter of TS demuxing passing along the codec > extradata correctly. > > Regards, > Tobias > > Thank you both for your replies.
Ok, I've cheated somewhat, and taken my (much older) ffmpeg and editted isom.c so that rather than substituting 0x40 for AV_CODEC_ID_AAC it now substitutes 0x67 instead. If I look at the resulting output file with mp4info and the output of FFmpeg itself they both show that it's MP4 AAC LC. However, the codec string given by mp4info is mp4a.67. If I want to send it to a web page it has to be AAC LC, but the typically accepted codec string is mp4a.40.2 which is also supposed to map to AAC LC. So now I am wondering how I would encode that in the ESDS or similar so that a) mp4info is happy that it's mp4a.40.2 and that the chrome video decoder is happy with the media type (because mp4a.67 codec string although in theory supported gives me "Unrecognised media codec: mp4a.67" in Chrome. Regards, Simon _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".