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videoio(macosx): fix array access exception in AVFoundation

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This commit is contained in:
Alexander Alekhin 2017-06-24 11:07:57 +03:00
parent 51e16bbe81
commit 35a2f2fef9
1 changed files with 9 additions and 1 deletions
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10
modules/videoio/src/cap_avfoundation_mac.mm
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@ -694,7 +694,15 @@ CvCaptureFile::CvCaptureFile(const char* filename) {
return; return;
} }
mAssetTrack = [[mAsset tracksWithMediaType: AVMediaTypeVideo][0] retain]; NSArray *tracks = [mAsset tracksWithMediaType:AVMediaTypeVideo];
if ([tracks count] == 0) {
fprintf(stderr, "OpenCV: Couldn't read video stream from file \"%s\"\n", filename);
[localpool drain];
started = 0;
return;
}
mAssetTrack = [tracks[0] retain];
if ( ! setupReadingAt(kCMTimeZero) ) { if ( ! setupReadingAt(kCMTimeZero) ) {
fprintf(stderr, "OpenCV: Couldn't read movie file \"%s\"\n", filename); fprintf(stderr, "OpenCV: Couldn't read movie file \"%s\"\n", filename);