* Frame request callback. A call to this should result in at least one
* frame being output over the given link. Video output pads only.
*/
- void (*request_frame)(AVFilterLink *link);
+ int (*request_frame)(AVFilterLink *link);
/**
* Link configuration callback. For output pads, this should set the link
int avfilter_config_link(AVFilterLink *link);
AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms);
-void avfilter_request_frame(AVFilterLink *link);
+int avfilter_request_frame(AVFilterLink *link);
void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref);
void avfilter_end_frame(AVFilterLink *link);
void avfilter_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int h);