+ if( ret > 0 ) {
+ if( frame->key_frame && seeking < 0 ) {
+ int use_cache = ffmpeg->get_use_cache();
+ if( use_cache < 0 ) {
+// for reverse read, reload file frame_cache from keyframe to pos
+ ffmpeg->purge_cache();
+ seeking = 1;
+ }
+ else
+ seeking = 0;
+ }
+ if( seeking > 0 && curr_pos < pos ) {
+ int vw =vframe->get_w(), vh = vframe->get_h();
+ int vcolor_model = vframe->get_color_model();
+ VFrame *cache_frame = new VFrame(vw, vh, vcolor_model);
+ ret = convert_cmodel(cache_frame, frame);
+ if( ret > 0 )
+ ffmpeg->put_cache_frame(cache_frame, curr_pos);
+ }
+ ++curr_pos;
+ }