[maemo-users] gst-launch and openmax

[From: Iñigo Illán Aranburu]

I think you should better use camerabin 

El mar, 26-01-2010 a las 21:01 -0500, Aldon Hynes escribió:

> I am new to using gst-launch.  I've not been able to find good descriptions
> of the different options or elements to use.  So, I started by using
> 
> gst-launch v4l2camsrc device=/dev/video1 num-buffers=1 ! videoscale !
> video/x-raw-yuv,width=475,height=356 ! omx_jpegenc ! filesink
> location=test.jpg
> 
> That gave me the error about omx_jpegenc
> 
> When I tried using jpegenc instead of omx_jpegenc I got a message:
> could not link videoscale0 to jpegenc0
> 
> I tried dropping videoscale, I tried using pngenc, none of these worked.
> The suggestion about dspjpegenc worked nicely, except that the images turned
> out all black or all white.  Is there a png counterpart?  I also tried
> adding capture-mode=1 to the v4l2camsrc element, which didn't make any
> difference.
> 
> I haven't done anything with ffmpegcolorspace, so I'll look at that next.
> 
> If you know of any good documentation on using the gst-tools, that would be
> greatly appreciated.
> 
> Aldon
> 
> -----Original Message-----
> From: Attila Csipa [mailto:maemo at csipa.in.rs]
> Sent: Tuesday, January 26, 2010 6:42 PM
> To: maemo-users at maemo.org
> Cc: Aldon Hynes
> Subject: Re: gst-launch and openmax
> 
> 
> On Tuesday 26 January 2010 23:21:49 Aldon Hynes wrote:
> > When I tried jpegenc I got
> >
> > WARNING: erroneous pipeline: could not link v4l2camsrc0 to jpegenc0
> >
> > When I tried pngenc I got
> >
> > WARNING: erroneous pipeline: could not link v4l2camsrc0 to pngenc0
> >
> > When I tried dspjpegenc, it captured a picture, but my image was all
> black.
> 
> Can you post the whole pipeline you're using ? Seems you're missing an
> element
> (likely ffmpegcolorspace or sorts).
> 
> Regards,
> Attila
> 
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