/* Work out the first video frame index that we will be given, taking into account
* the difference between first video and first audio.
*/
- ContentTime video_delay = content->first_video().get() - content->audio_stream()->first_audio.get();
+ ContentTime video_delay = content->first_video().get() - content->ffmpeg_audio_streams().front()->first_audio.get();
if (video_delay < ContentTime ()) {
video_delay = ContentTime ();
}