[vlc] Re: How is H.264 indicated?

[Jonas A. Larsen]

> 
> > Play the file in a player that does display the information you want,
> > and play the same file in VLC.
> 
> I did this with a few files and here is the result:
> 
> - file1: According to the Stream and Media Information of vlc,
> video contents (stream 0) is mp4v
> Moonlight Player says DIV4 (30fps, 160x128).
> 
> - file2: According to the Stream and Media Information of vlc,
> video contents (stream 0) is mpgv
> Moonlight Player says MPEG2-MP/ML (204.8kbps, 29.97fps, 352x288, 4:3)
> 
> - file3: vlc cannot play this file (there might be some problems with
> the file itself. I had posted a couple of questions about this last
> week with the subject 'Problem playing .trp file')
> Moonlight Player says H.264 (14.99fps, 320x180)
> 
> As you can see, the two players show different information.
> 
> This led to the conclusion that vlc can't play h.264 files which
> I think is wrong.
> 

It's a funny coincidence cuz I am working on this very issue at the moment.
I have made a patch to make vlc show video and audio tracks real formats,
since it currently isn't done in vlc. It works fine for most formats, but
vlc does some very weird, none standard manipulation of certain formats, for
example many fourcc's and formats show up as fourcc "mpgv" which is, as far
as I could tell, something videolan have made up completely. There are other
examples as well. My guess is this is done to make it simpler to decode
stuff since u just threat multiple fourcc's the same way. It sort of blocks
my patch since it prohibits me from reading the real fourcc of whats
playing, instead of just stuff like "mpgv".

I would love for one of the videolan developers, to correct me or give me
some hints on how this can be fixed. Or maybe just an explanation for why
vlc manipulates the shown fourcc's?

Regards
Jonas Larsen

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