[gst-devel] missing caps in ffmpeg

[Thomas Vander Stichele]

Hi,

On Mon, 2005-09-05 at 11:17 +0100, Philip de Nier wrote:
> The ffmpeg ffenc_mpeg2video (and some others like ffenc_h263) are not 
> returning the correct caps and the negotiation of links is failing. For 
> example, the code below:
>          GstElement* encoder = gst_element_factory_make 
> ("ffenc_mpeg2video", "encoder");
>          GstPad* pad = gst_element_get_pad(encoder, "sink");
>          GstCaps* caps = gst_pad_get_caps(pad);
>          printf("Caps: %s\n", gst_caps_to_string(caps));
> returns:
>          Caps: video/x-raw-yuv, width=(int)[ 16, 4096 ], height=(int)[ 16, 
> 4096 ], framerate=(double)[ 0, 1.7976931348623157e+308 ], format=(fourcc)I420

This looks correct to me.

> It should return all 11 caps returned by "gst-inspect ffenc_mpeg2video"?

What 11 caps ? Here's what I get:

Pad Templates:
  SRC template: 'src'
    Availability: Always
    Capabilities:
      video/mpeg
                  width: [ 16, 4096 ]
                 height: [ 16, 4096 ]
              framerate: [ 0, 1.7976931348623157e+308 ]
            mpegversion: 2
           systemstream: false

  SINK template: 'sink'
    Availability: Always
    Capabilities:
      video/x-raw-rgb
      video/x-raw-yuv


> I've tried a simple pipeline such as "gst-launch filesrc location=test.dv ! 
> decodebin ! ffenc_mpeg2video ! filesink location=test-output" and that also 
> fails.

I'd like to reproduce your problem but I don't have a .dv sample clip.
Could you try with any of the media provided on
http://gstreamer.freedesktop.org/media or supply us with a (preferably
small) DV test file ?

Thomas


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