[Ffmpeg-devel] Re: [PATCH] Configure selectable video grab format

Michel Bardiaux mbardiaux
Wed Jan 31 17:57:42 CET 2007

Ramiro Polla wrote:
> Ramiro Polla wrote:
>> Michel Bardiaux wrote:
>>> M?ns Rullg?rd wrote:
>>> [snip]
>>>> That said, I don't like the design of the grabbing code at all.  
>>>> IMHO it would
>>>> be much cleaner to simply run ffmpeg -f v4l2 -i /dev/video0 or 
>>>> whatever,
>>>> dropping the whole concept of a default grabbing device used if no 
>>>> input is
>>>> specified.
>>> FWIW I agree.
>> Me too =).
>> The code for using a default grabbing device is really buggy (the 
>> grabbing interfaces depend on what has been set for output).
> It seems this would be just removing a bunch of redundant code (like 
> Michael said), and making few adaptations to the existing -i code.
> One problem with -i <grab device> is when you want to use the default 
> grab device. This could be accomplished by (some suggestions):
> a) using the '-' character

Please dont, '-' generally means stdin. AAMOF ffmpeg -i - < /dev/video0 
*should* work as expected.

> b) making -grab mean -i <default device>.

Why do you insist on having a default grab device?

> Ramiro Polla

Michel Bardiaux
R&D Director
T +32 [0] 2 790 29 41
F +32 [0] 2 790 29 02
E mailto:mbardiaux at mediaxim.be

Mediaxim NV/SA
Vorstlaan 191 Boulevard du Souverain
Brussel 1160 Bruxelles

More information about the ffmpeg-devel mailing list