*
* This is free software; see GPL.txt
*/
-AVFormatContext *open_input_stream(const char *fname, int w, int h, int fps);
+AVFormatContext *open_input_stream(const char *fname, int w, int h, int fps, const char *impform);
void close_input_stream(AVFormatContext *s);
AVPacket *read_input_packet(AVFormatContext *s);