Using playbin2 to read MP4/MOV files returns buffer with half the number of expected bytes

[Chuck Crisler]

1. Is it possible that your video file is padding the 4 byte?
2. What do the caps say about the RGB format?
3. Is there a stride setting on the component that generated the file?
(What was used to generate the file?)


On Mon, Mar 3, 2014 at 1:11 AM, Dinesh Iyer <dsi.maillist at gmail.com> wrote:

> Hi,
> I have an application that uses Gstreamer (currently using 0.10.36) to
> read video files. I am using playbin2 and an appsink for the video-sink. I
> am reading all the video as RGB using the following caps:
>
> GstCaps* caps = gst_caps_from_string( "video/x-raw-rgb, "
>                                             /*"bpp = (int) 24, "
>                                             "depth = (int) 24, "
>                                             "endianness = (int)
> BIG_ENDIAN, "
>                                             "red_mask = (int) 16711680, "
>                                             "green_mask = (int) 65280, "
>                                             "blue_mask = (int) 255"*/ );
>
> I have commented out everything except the mime-type as otherwise the
> pipeline does even connect.
>
> When I read a buffer using gst_app_sink_pull_buffer, I received a buffer
> whose size in bytes is half the total expected. For a 640*480 8-bit RGB
> video frame, the size in bytes of the GstBuffer is (640*480*3/2). However,
> when I inspect the caps associated with the buffer, the height and width
> are 480 and 640 respectively. Am I missing something?
>
> I am unable to upgrade to Gstreamer 1.0 due to a company wide policy.
>
> Regards,
> Dinesh
>
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