[gst-devel] MXF-wrapped JPEG2000 decoding

[Tim-Philipp Müller]

On Thu, 2010-12-30 at 17:12 +0100, Florian Agez wrote:

> I'm currently trying to make a very simple pipeline that would take an 
> MXF file with JPEG2000 video essence as input and display it. For now, 
> the pipeline looks something like this:
> 
>      gst-launch filesrc location="source.mxf" ! mxfdemux name=d  d. ! 
> jp2kdec ! autovideosink
> 
> But that won't take me anywhere, I only get this error message:
> 
>      ERROR : element /GstPipeline:pipeline0/GstMXFDemux:d : Internal 
> data stream error.
>      Additional debug info:
>      mxfdemux.c(2797): gst_mxf_demux_loop (): 
> /GstPipeline:pipeline0/GstMXFDemux:d:
>      stream stopped, reason not-negotiated

First thing to try in such cases is: does it work with playbin?

 gst-launch-0.10 -v playbin2 uri=file:///path/to/foo.mxf

If not, the output of that might already tell us something.

>  From what I've experimented so far, it looks like mxfdemux has no 
> problem at all unwrapping the JPEG2000 code stream (if I just link the 
> demuxer to a filesink, I get a nice concatenation of valid JPEG2000 code 
> streams), but I can't think of a reason why jp2kdec would refuse to 
> handle this raw code stream. 

You might need an ffmpegcolorspace ! videoscale in front of the
autovideosink as well.

Cheers
 -Tim