I can't trim the video with type of mp4. How to resolve it?

[vivianflygirl]

Hello,
Thank you for providing us so good open source code. I met with a problem and help you could help me.
My video type is mp4, and when run to code " Float64 duration = CMTimeGetSeconds([self.asset duration]);". It said that asset can't count mp4's duration. So how can I do? Must I transfer Mp4 to .mov?
Thanks a lot!

[vivianflygirl]

是我本地视频忘记加file://导致了，可以裁剪了。谢谢！