Give a better error when FFmpegImageProxy fails to decode an image that was passed...

diff --git a/src/lib/ffmpeg_image_proxy.cc b/src/lib/ffmpeg_image_proxy.cc
index 3548117ff092e7847975cb9952ec9660ae35ba65..33c619a2d92c5c6938e2a1a5f777ccce39326ae4 100644 (file)
--- a/src/lib/ffmpeg_image_proxy.cc
+++ b/src/lib/ffmpeg_image_proxy.cc
@@ -146,7 +146,12 @@ FFmpegImageProxy::image (optional<dcp::Size>) const
                e = avformat_open_input (&format_context, "foo.tga", f, &options);
        }
        if (e < 0) {
-               throw OpenFileError (_path->string(), e, true);
+               if (_path) {
+                       throw OpenFileError (_path->string(), e, true);
+               } else {
+                       /* XXX: this needs to be marked translatable after the string freeze is over */
+                       boost::throw_exception(DecodeError(String::compose("Could not decode image (%1)", e)));
+               }
        }
 
        if (avformat_find_stream_info(format_context, 0) < 0) {