[MEncoder-users] lavf/mp4 buggy?

[vdmsss]

On 18 Aug 2007, at 22:15, Fredrik Eriksson wrote:
> vdmsss wrote:
>> Hello,
>>
>> 	I have been trying to use the new lavf format=mp4, with B-frames
>> support, and it looks as though the muxer does something wrong with
>> the audio track. Let's use the command below for reference (entire
>> output at the bottom of this message -- the key is clearly a warning
>> about MS style audio tag, but I don't know what it means).
>>
>>
>>> mencoder -of lavf -lavfopts format=mp4 -ovc lavc -oac lavc -
>>> lavcopts vcodec=mpeg4:acodec=vorbis -o test.mp4 test.avi -frames  
>>> 1000
>>>
>>
>> (1) Firstly, the resulting file has no audio when played with
>> mplayer. It complains about missing the audio codec (entire output at
>> the bottom of the message)
>>
>>
> Correct me if I'm wrong but... the mp4 format doesn't support vorbis
> audio, right?

Well, according to the documentation of gpac it does, but I don't  
know about official stuff. However, this is immaterial: as I said I  
have the same problem with all audio formats.