[gst-devel] How to make GNonLin not to decode videoclip?

[wl2776]

Edward Hervey wrote:
> 
>   Set the caps property of the gnlfilesource to the format you want
> (ex : video/mpeg,mpegversion=2 for mpeg2 video)
> 

Looks like it doesn't work. At least, with gstreamer-sharp.
Here is my code.
If I set caps on gnlfilesources, "pad-added" handler is simply not called.

//"pad-added" signal handler
void comp_PadAdded(object o, PadAddedArgs args)
{
    Trace.WriteLine("pad-added: "+args.Pad.Parent.Name);
}

// another function: 
// It retrieves messages from the bus and processes them by itself.

Gst.Pipeline pipeline = new Pipeline("cut");

Gst.Element comp = Gst.ElementFactory.Make("gnlcomposition","compbin");
pipeline.Add(comp);

comp.PadAdded += new PadAddedHandler(comp_PadAdded);

//FIXME: replace with proper muxer and filesink
Gst.Element asink = Gst.ElementFactory.Make("fakesink", "asink");
Gst.Element vsink = Gst.ElementFactory.Make("fakesink", "vsink");

pipeline.Add(asink);
pipeline.Add(vsink);
            
fragment[] fr = optimize_fragment_list(get_included_fragment_list()); 
Gst.Element[] filesource = new Gst.Element[fr.Length];
ulong begin = 0;
for (int i = 0; i < fr.Length; i++) {
  filesource[i] =
Gst.ElementFactory.Make("gnlfilesource","fr"+i.ToString());
  ((Gst.Bin)comp).Add(filesource[i]);
  filesource[i]["location"] = Hyena.SafeUri.FilenameToUri(cur_filename);
//I've stolen this from the Banshee :)
  Gst.Caps cps = Gst.Caps.FromString("video/mpeg,mpegversion=2");
  filesource[i]["caps"] = cps;
  filesource[i]["start"] = (UInt64)(begin * (ulong)pos_divisor *
Gst.Clock.MSecond);
  filesource[i]["duration"] = (Int64)((ulong)(fr[i].end-fr[i].begin) *
(ulong)pos_divisor * Gst.Clock.MSecond);
  filesource[i]["media-start"] = (UInt64)((ulong)fr[i].begin *
(ulong)pos_divisor * Gst.Clock.MSecond);
  filesource[i]["media-duration"] = (Int64)((ulong)(fr[i].end - fr[i].begin)
* (ulong)pos_divisor * Gst.Clock.MSecond);
  begin += (ulong)(fr[i].end - fr[i].begin);
}

pipeline.SetState(State.Playing);

while(!save.CancellationPending){ //this is intended to run from
BackgroundWorker
  Gst.Message msg = pipeline.Bus.Pop(1000);
  bool r=true;
  if(msg!=null)
    r=BusCall(pipeline.Bus, msg);
  if (!r) 
    break;
}

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