[FFmpeg-devel] [PATCH] v4l2: Old or cheap cams will _not_ accept parms query or modification. ioctl(VIDIOC_G_PARM) or ioctl(VIDIOC_S_PARM)

Michael Niedermayer michaelni at gmx.at
Thu Feb 23 05:45:54 CET 2012

On Wed, Feb 22, 2012 at 09:51:35PM -0300, Lucas F. Ottaviano wrote:
> Hello! I think you should not ignore this, if you want ffmpeg to be as
> universally accessible as possible...
> It's a shame that because of this simplicity some users will not be able to
> use ffmpeg or ffplay.
> + Some old or cheap cams will _not_ accept to set or get paramaters,
>    so returning an error when this is not possible is not good.

There are some problems in the patch
simply ignoring the error would end up with a random timebase

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Avoid a single point of failure, be that a person or equipment.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20120223/7dc83fda/attachment.asc>

More information about the ffmpeg-devel mailing list