X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fwriter.cc;h=42187dc6e78616a24673057bb4e9eb87802381aa;hb=d8a2e55855b50eda28ec7d394449274f5e085bd6;hp=c2a6c981bc8f31a2629affe444df88c225ae7ddc;hpb=ebe451c248c3accd1a564bcad5eabf9d32a971f3;p=dcpomatic.git

diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index c2a6c981b..42187dc6e 100644
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -541,7 +541,9 @@ Writer::check_existing_picture_mxf ()
 		shared_ptr<Job> job = _job.lock ();
 		assert (job);
 
-		job->set_progress (float (_first_nonexistant_frame) / N);
+		if (N > 0) {
+			job->set_progress (float (_first_nonexistant_frame) / N);
+		}
 
 		if (_film->three_d ()) {
 			if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_LEFT)) {