Question

Problem:

When I record a video in my UIImagePickerController with allowsEditing set to YES, and afterwards trim the video by using the trim-interface that comes after video capture, I get returned the original video, instead of the trimmed one.

Setup:

I am using a UIImagePickerController for video capture, with the allowsEditing property set to YES. In the delegate method didFinishPickingMediaWithInfo, I use UIImagePickerControllerMediaURLfrom the info NSDictionary to get the path URL. The official Apple docs don’t mention any Edited video URL unfortunately.

Code:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];

    if (CFStringCompare ((__bridge CFStringRef) mediaType, kUTTypeMovie, 0)
        == kCFCompareEqualTo) {

        self.tempVideoPath = [[info objectForKey:
                                UIImagePickerControllerMediaURL] path];
    }
}

I realise this question is similar to other ones posted here on SO, but there was no definitive answer why it doesn’t work or why the option is even there. If it is intended like this, I don’t understand why there is an ‘allowsEditing’ property for the picker.

EDIT: In the info dictionary I got back are the following keys:

info: {
    UIImagePickerControllerMediaType = "public.movie";
    UIImagePickerControllerMediaURL = "file://localhost/private/var/mobile/Applications/F12E4608-FE5A-4EE3-B4E2-8F7D2508C4C8/tmp/capture-T0x21d810.tmp.wabFCC/capturedvideo.MOV";
    "_UIImagePickerControllerVideoEditingEnd" = "5.498333333333333";
    "_UIImagePickerControllerVideoEditingStart" = "4.273402690887451";
}

Does this mean we have to trim it ourselves with this data? Then the Apple documentation isn’t very clear about this. If so, do you know a good practice for this?

Answer 1

take a look at the highlighted answer on this post:

How to trim the video using AVFoundation

I think it’s exactly what you want. The answer uses UIImagePickerController too

Hope it helps,
Mário