FFMPEG- Duration of audio file is inaccurate

Question

I have video file (mp4). I want to detach audio stream (AAC format) from that file and save in PC. With below code, Generated aac file canplay now on KM player, but can not pla

Answer 1

Object type and sample rate index must be set to the real, correct values. Both values can be parsed out of the audio specific config in the extradata field in the codec context. All the information you need is here: http://wiki.multimedia.cx/index.php?title=MPEG-4_Audio