[Bug 739771] v4l2src allocator fails

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=739771
  GStreamer | gst-plugins-good | 1.4.4

--- Comment #13 from Sudhir Kesti <vndkst at yahoo.com> 2014-11-13 12:24:21 UTC ---
(In reply to comment #12)
> I've checked the two traces and differences are:
> 
> a) 1.2 allocates 4 buffers while 1.4 allocates 2
> b) There is possible difference in buffer.bytesused/length between 1.2 and 1.4.
> 
> You can check if a) is the issue by modifying GST_V4L2_MIN_BUFFERS constant to
> be 4 (in gst-plugins-good/sys/v4l2/gstv4l2object.h).
> 

I modified GST_V4L2_MIN_BUFFERS to 4. I dont see any difference in the
behaviour.

> For b), you'd have to instrument the code a little more, so we know the values
> in set in the v4l2_buffer, maybe you drivers requires a specific field to be
> set, and that it was omitted in 1.4.
> 

I am modifying the code and will update the results.


> Providing your custom driver source code would also be key to get some more
> help here.

I do not have driver source code. We are using third party capture device and
device driver.

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