Re: [FFmpeg-user] Use ffmpeg to convert stereo audio to mono

2014-12-05 Thread Moritz Barsnick
Could we know how ffmpeg determine audio channel number from MP4 file? MP4 container indicates it's channel count is 2, but ffprobe shows mono as expected. ffprobe probably looks at the actual AAC stream? Here's a hint: http://sourceforge.net/p/opencore-amr/mailman/message/31876733/ The

Re: [FFmpeg-user] Use ffmpeg to convert stereo audio to mono

2014-12-05 Thread Christian Ebert
* Moritz Barsnick on Friday, December 05, 2014 at 10:37:14 +0100 Could we know how ffmpeg determine audio channel number from MP4 file? MP4 container indicates it's channel count is 2, but ffprobe shows mono as expected. ffprobe probably looks at the actual AAC stream? Here's a hint:

[FFmpeg-user] Use ffmpeg to convert stereo audio to mono

2014-12-04 Thread Wesley Wen
Hi, Could we know how ffmpeg determine audio channel number from MP4 file? MP4 container indicates it's channel count is 2, but ffprobe shows mono as expected. -- I use ffmpeg to convert a audio into mono by the following command: ffmpeg -y -t 30 -i audio.mp4 -dn -sn -vn -map 0 -c:a libfdk_aac