Hi, I've created 5.1 channel aac-lc audio from 5.1 channel ac-3 audio. However, the sample entry of "mp4a" box show channel_count as "2", not "6". Howerver, the MPEG-4 elementary stream descriptor in "esds" box describes channel count as 6.
Command ffmpeg -loglevel debug -i source.mp4 -filter_complex "channelmap=map=FL-FL|FR-FR|FC-FC|LFE-LFE|SR-BR|SL-BL:channel_layout=5.1" -c:v copy -c:a libfdk_aac -profile:a aac_he -f mp4 demo.mp4 I've checked the channel_cout using " http://download.tsi.telecom-paristech.fr/gpac/mp4box.js/filereader.html";. I've checked the value of the "esds" box with shaka packager and ffrpobe. Can you explain the reason why the values are different, please? The source file "source.mp4" https://drive.google.com/open?id=0B2CC25n6pcNwejM1T3ZQb25hOENJS0xBTlhZcU1nZHZBOUM0 The output file "demo.mp4" https://drive.google.com/open?id=0B2CC25n6pcNwdnJNUmhQZU4wck1YRUhtVnRFekF1S2JnUU9z Regards, Yuntaek Lim _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
