AVURLAsset refuses to load video

Question

I\'m trying to load a video file into my iPad app as an AVURLAsset, using the asynchronous-loading stuff to wait for it to be ready. Problem is, when I run it,

Answer 1

If you are using -[NSURL fileURLWithPath:] to create the URL and still get the same error.

Check the AVURLAssetReferenceRestrictionsKey, Your local m3u8 may failed to play if it contains remote resource.

Set the value to @(AVAssetReferenceRestrictionForbidNone) should solve the problem.

Answer 2

If anyone is still having issues with this even after using fileURLWithPath, try requesting NSTimeIntervals in the time array if you are using int(s).

This does not work:

    NSMutableArray *playbackTimes = [NSMutableArray array];
    for (int i = 0; i <= 10; i ++) {
        [playbackTimes addObject:@(i)];
    }

    [self.videoPlayer requestThumbnailImagesAtTimes:playbackTimes timeOption:MPMovieTimeOptionNearestKeyFrame];

This works:

    NSMutableArray *playbackTimes = [NSMutableArray array];
    for (int i = 0; i <= 10; i ++) {
         [playbackTimes addObject:@((NSTimeInterval)i)];
     }

     [self.videoPlayer requestThumbnailImagesAtTimes:playbackTimes timeOption:MPMovieTimeOptionNearestKeyFrame];

Answer 3

Solved. The trick: use fileURLWithPath:, not URLWithString:. Apparently the difference is really, really significant.