Re: support MJPEG based webcams

["Jaap A. Haitsma" <jaap haitsma org>]

On Thu, Mar 13, 2008 at 8:07 PM, Ioannis Nousias <s0238762 sms ed ac uk> wrote:
>
>  > i wouldnt just add a gst element, just because it doesnt do anything.
>  > this can have performance regressions and stuff of that kind.
>  >
>  > daniel
>  >
>  >
>  Hi daniel,
>
>  When the input is raw, 'decodebin' creates ghost pads (proxy), which do
>  have some overhead (dereferencing?), but it's negligible. I've done a
>  simple test with 30 or so cascaded 'decodebin's and there was no
>  measurable CPU difference. It does affect the creation-time of the
>  pipeline though, by adding type checks, but that's probably similar to
>  adding custom checks for the input format.
>
>  It's just more flexible this way. Currently, it ignores any format that
>  isn't raw. Sure, a custom check and a  conditional addition of a
>  'jpegdec' would do the trick in my case, but what about other cases
>  (unforeseen)? Similarly to why you use ffmpegcolorspace rather than
>  manually handling some types only.
>
>  what do you think?
>
Daniel,

I think it's a good idea to add the decodebin. We'll support more
cameras and it doesn't add much overhead

Jaap