Re: [MEncoder-users] Remuxing to mp4 on windows

Raimund Berger wrote:
> James Hastings-Trew <jimht@shaw.ca> writes:
>
>
>> mp4box -aviraw video temp.avi
>> mp4box -aviraw audio temp.avi
>> rename temp_audio.raw temp_audio.aac
>> mp4box -add temp_video.h264 -add temp_audio.aac -fps 23.976 -tmp c:\temp
>> MyMP4.mp4
>>
>> mplayer plays the resulting file fine. The problem is that Quicktime
>> will not play the file, with the message: Error -2041: An invalid sample
>> description was found in the movie (MyMP4.mp4).
>>
>> However, if I separately encode the audio with some other program like
>> neroAacEnc, Quicktime is quite happy with the file that mp4box produces.
>> So there is something "funky" about the .aac audio stream that is
>> produced by the mencoder / mp4box method. Any ideas?
>>
>
> Try
>
> mp4box -aviraw video temp.avi
> mp4box -aviraw audio temp.avi
> rename temp_audio.raw temp_audio.aac
> mp4box -add temp_audio.aac temp_audio.m4a
> mp4box -add temp_video.h264 -add temp_audio.m4a -fps 23.976 -tmp c:\temp
> MyMP4.mp4
>
> I believe that should playback OK in qt.
>
> Again, I can't give you technical details about why this intermediate
> step is necessary, as I myself just macheted my way through the
> AVC/AAC/MP4 jungle, leaving a lot stuff aside on the way.
>
> Roughly, I guess it has to do with mp4 allowing various muxing options
> and formats depending on whether you want to stream or not etc, plus
> Apple implementing it's own peculiarities.
>
> The intermediate step above is often quoted as achieving iTunes
> compatibility. And I didn't yet find a way to do it in 1 step muxing,
> as QT compatibility isn't my prime objective right now. Maybe it's
> possible with mp4box, maybe not. Let us know though if you find out
> more.
Tried this this morning, and it doesn't work. I'm going with my
externally encoded .m4a audio solution for now, unless someone else has
a "caramilk" secret to share about how to this.

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