Hello ---
I'm trying to fix an application (cinelerra) that changes from using
Xv hardware scaling to using unaccelerated X11 output in the middle of
a video stream. Everything works fine, but there is a "black flash"
(output window goes dark) for a fraction of a second at the switch.
Current shutdown code looks something like this:
case BC_YUV422:
XvStopVideo(top_level->display, xv_portid, last_pixmap);
for(int i = 0; i < ring_buffers; i++) {
XFree(xv_image[i]);
}
XShmDetach(top_level->display, &shm_info);
XvUngrabPort(top_level->display, xv_portid, CurrentTime);
shmdt(shm_info.shmaddr);
shmctl(shm_info.shmid,
IPC_RMID, 0);
break;
Output window goes black soon after XvStopVideo call. Is there
something I can do immediately before or after this call to avoid
having a period of time when no image is shown? Something I can avoid
doing? My blind attempts haven't worked.
Thanks!
Nathan Kurz
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