void release_display_frame(DisplayFrame *frame);
double pts() { return double(pts_int) / TIMEBASE; }
void trim_queue(CaptureCard *card, size_t safe_queue_length);
void release_display_frame(DisplayFrame *frame);
double pts() { return double(pts_int) / TIMEBASE; }
void trim_queue(CaptureCard *card, size_t safe_queue_length);