Cannot get better video quality than 720p from UIImagePickerController

Question

Created Jun ’20

Replies 3

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I am using UIImagePickerController to let users pick videos to use in my app. However I noticed that best quality I am able to get is 1280x720 probably because of the compression that always happen.

These videos are 4K and I would like to get this resolution or at least 1080p.

Here is my code for creating picker:

Code Block let picker = UIImagePickerController()
picker.delegate = self
picker.videoQuality = .typeHigh
picker.sourceType = .photoLibrary
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary) ?? []
assert(!picker.mediaTypes.isEmpty)
picker.mediaTypes = ["public.movie"]
picker.allowsEditing = true
present(picker, animated: true, completion: nil)

Modifying allowsEditing or videoQuality does not do anything.

Thanks for help!

Answered by renssies in 612202022

Try setting picker.videoExportPreset to one of the AVAssetExportSession presets: https://developer.apple.com/documentation/avfoundation/avassetexportsession/export_preset_names_for_quicktime_files_of_a_given_size

In my test picker.videoExportPreset = AVAssetExportPresetHEVCHighestQuality returns the video at original size in .move format.

If you really want to have the original video, you might want to look into PhotoKit/Photos framework.

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Answer 1

renssies OP

Jun ’20

Accepted Answer

Try setting picker.videoExportPreset to one of the AVAssetExportSession presets: https://developer.apple.com/documentation/avfoundation/avassetexportsession/export_preset_names_for_quicktime_files_of_a_given_size

In my test picker.videoExportPreset = AVAssetExportPresetHEVCHighestQuality returns the video at original size in .move format.

If you really want to have the original video, you might want to look into PhotoKit/Photos framework.

2

Answer 2

nemecek_f OP

Jun ’20

Wonderful! Thanks this works great.

0

Answer 3

travis_page OP

1w

I am having an issue with this as well. I am using typeHigh, but this seems to max out at 1080p.

The documentation states that typeHigh will: If recording, specifies that you want to use the highest-quality video recording supported for the active camera on the device.

Is it possible to obtain 4k with UIImagePickerController, or is 1080 the highest quality possible?

0