Hi,
I am using ffmpeg for generating aac stream from .wav and mux it to mp4
container format. The resulted mp4 stream plays only in VLC Media player,but is
not played in Apple quicktime player & windows media player with ffdshow. I
used the following commands
1. ffmpeg -i input.wav input.aac
---encodes an audio .wav to aac.
2. ffmpeg -i input.aac -acodec copy -vn input.mp4
---packs the aac stream in mp4 container format.
The resulted input.mp4 does not plays in Quicktime player, I tried one more
thing
3.ffmpeg input.wav input_ffmpeg.mp4
---encodes to aac & packs to mp4 format.
The resulted input_ffmpeg.mp4 plays in Quicktime player.
I demuxed the aac from the mp4 by
4.ffmpeg -i input_ffmpeg.mp4 -acodec copy -vn input_ffmpeg.aac
I found that both input.aac & input_ffmpeg.aac are exactly same in bitwise
comparison. I further looked at this issue.
The aac header ff f1 50 80 05 7f fc was missing in media data box of
input_ffmpeg.mp4. Is it unnecessary to pack these header in MP4 Container? I
want the stream generated by first method(input.mp4) to play in quicktime. Do i
need to give some more parameters while muxing aac stream. Can anyone help me
in this issue?
Regards,
Santhosh
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