if (avcodec_decode_video2 (_video_codec_context, _video_frame[_this_video_frame], &frame_finished, &_packet) >= 0 && frame_finished) {
/* Where we are in the output, in seconds */
- double const out_pts_seconds = video_frame() / frames_per_second();
+ double const out_pts_seconds = video_frame_index() / frames_per_second();
/* Difference between where we are and where we should be */
double const delta = pts_seconds - out_pts_seconds;