Unhandled Objective-C exception when playing video

8 years ago · f71bf21aaf
parent cc09f5a7de
commit f71bf21aaf
1 changed files with 9 additions and 1 deletions
--- a/modules/highgui/src/cap_avfoundation_mac.mm
+++ b/modules/highgui/src/cap_avfoundation_mac.mm
@ -697,7 +697,15 @@ CvCaptureFile::CvCaptureFile(const char* filename) {
        return;
    }

-    mAssetTrack = [[mAsset tracksWithMediaType: AVMediaTypeVideo][0] retain];
+    NSArray *tracks = [mAsset tracksWithMediaType:AVMediaTypeAudio];
+    if ([tracks count] == 0) {
+      fprintf(stderr, "OpenCV: Couldn't read movie file \"%s\"\n", filename);
+      [localpool drain];
+      started = 0;
+      return;
+    }
+
+    mAssetTrack = [tracks[0] retain];

    if ( ! setupReadingAt(kCMTimeZero) ) {
        fprintf(stderr, "OpenCV: Couldn't read movie file \"%s\"\n", filename);