[Bug 771750] v4l2videobufferpool: Need set right video meta

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=771750

--- Comment #5 from kevin <kevinbing.song at gmail.com> ---
Sorry for later response. No work environment to give you log.

You can check below code in gstglupload.c.

static gboolean
_dma_buf_upload_accept (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
    GstCaps * out_caps)
{
  /* Update video info based on video meta */
  if (meta) {
    in_info->width = meta->width;
    in_info->height = meta->height;

    for (i = 0; i < meta->n_planes; i++) {
      in_info->offset[i] = meta->offset[i];
      in_info->stride[i] = meta->stride[i];
    }
  }
...
    plane_size = gst_gl_get_plane_data_size (in_info, NULL, i);

    if (!gst_buffer_find_memory (buffer, in_info->offset[i], plane_size,
            &mems_idx[i], &length, &mems_skip[i]))
      return FALSE;
}

Maybe gst_buffer_find_memory() should use mem->maxsize for mplane buffer. Our
driver output NV12 video with mplane. And append some memory at the end of Y
plane.

As the work is pending, I will check it later.

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