[FFmpeg-devel] [PATCH] get the right value for the dac3 atom

[vmrsss]

On 5 Sep 2008, at 00:51, Baptiste Coudurier wrote:
>> Well, my experience is that with current ffmpeg, x264 + ac3 works  
>> well
>> in QT 7.5 if the extension is .mov and does not ("An invalid sample
>> description was found in the movie") if the extension is mp4 (all the
>> rest being equal). (for information, mplayer can't find the audio
>> stream in any of the files, while ffplay plays them just fine.)
>> Perhaps I can help with testing.
>
> Nice to hear, I confirmed this too.
> Quicktime player recognizes the ac-3 track (Displaying "AC3" in
> informations) when placed in .mov and .m4v, however it chokes on .mp4
> too, QT is known to be picky about .mp4.

Question: I thought that mp4 and mov were essentially the same (where  
mp4 is the standard, while mov is more of an apple creature). As a  
rule of thumb, is there any situation where mov might be preferred  
over mp4? (And by the way, shouldn't m4v be reserved for a elementary  
video stream (no audio)?)

Regards.