assrender doesn't render frames into given memory area
@fraxinas
Submitted by Andreas Frisch Link to original bug (#739693)
Description
i've done some debugging and by the looks of it, the videosrc buffer data pointer
changes during this line (in gst_ass_render_chain_video):
gst_video_frame_map (&frame, &render->info, buffer, GST_MAP_WRITE);
if the rendering is supposed to be written into a specially allocated dma area, this will cause the need for an extra memcpy.
this may be a general gst_video_frame_map problem or just me not correctly understanding yet, how this works.