Fix progress reporting for 3D DCPs.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index 4c9749d89..109447f73 100644
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -274,9 +274,14 @@ try
 			if (_film->length()) {
 				shared_ptr<Job> job = _job.lock ();
 				assert (job);
-				job->set_progress (
-					float (_full_written + _fake_written + _repeat_written) / _film->time_to_video_frames (_film->length())
-					);
+				int total = _film->time_to_video_frames (_film->length ());
+				if (_film->three_d ()) {
+					/* _full_written and so on are incremented for each eye, so we need to double the total
+					   frames to get the correct progress.
+					*/
+					total *= 2;
+				}
+				job->set_progress (float (_full_written + _fake_written + _repeat_written) / total);
 			}
 		}