3gp video and AVPlayer in iPhone

I have an iPhone app that plays videos from the Camera Roll using AVPlayer. I have a 3gp video on my iPhone that I cannot play with AVPlayer, but can be played in the Photos app.

Can anyone help me achieve this:

1. Videos that do not match the AVFoundation classes should not appear in my views that show video from a Roll Roll camera using the ALAsset library.
2. Is there any API related to AVURLAsset, AVAssetTrack, etc. that determines if the video is played or not.

I've tried the following:

1. The reproducible property AVURLAsset indicates that it is reproducible.
2. The duration of this video can be obtained