Disallow unsetting the frame rate on FFmpeg/DCP content (#1547).

diff --git a/src/wx/timing_panel.cc b/src/wx/timing_panel.cc
index 7e7dd6fbdade58d1fd75a24b2858235e4e0e9d16..f10815ca42c1ce44f5305b79ea8a4666f4c9eeb0 100644 (file)
--- a/src/wx/timing_panel.cc
+++ b/src/wx/timing_panel.cc
@@ -33,6 +33,8 @@
 #include "lib/audio_content.h"
 #include "lib/string_text_file_content.h"
 #include "lib/video_content.h"
+#include "lib/dcp_content.h"
+#include "lib/ffmpeg_content.h"
 #include <dcp/locale_convert.h>
 #include <boost/foreach.hpp>
 #include <set>
@@ -463,7 +465,22 @@ TimingPanel::play_length_changed ()
 void
 TimingPanel::video_frame_rate_changed ()
 {
-       _set_video_frame_rate->Enable (true);
+       bool enable = true;
+       if (_video_frame_rate->GetValue() == wxT("")) {
+               /* No frame rate has been entered; if the user clicks "set" now it would unset the video
+                  frame rate in the selected content.  This can't be allowed for some content types.
+               */
+               BOOST_FOREACH (shared_ptr<Content> i, _parent->selected()) {
+                       if (
+                               dynamic_pointer_cast<DCPContent>(i) ||
+                               dynamic_pointer_cast<FFmpegContent>(i)
+                               ) {
+                               enable = false;
+                       }
+               }
+       }
+
+       _set_video_frame_rate->Enable (enable);
 }
 
 void