/** true if we should keep going in the face of `survivable' errors */
bool const _tolerant;
/** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
- bool _play_referenced = false;
+ boost::atomic<bool> _play_referenced;
/** Time of the next video that we will emit, or the time of the last accurate seek */
boost::optional<dcpomatic::DCPTime> _next_video_time;