CODEWITHSUNDEEP
iosavfoundation
John
John

Reputation: 2141

Why doesn't my AVURLAsset have a duration?

In my iOS app (SDK 5.6), I create an AVURLAsset from a short video, like so:

AVURLAsset *asset = [AVURLAsset URLAssetWithURL:assetURL options:nil];

This seems to work fine. If I examine the asset in gdb, it looks like this:

(gdb) po asset
<AVURLAsset: 0x1a1c40, URL = file://localhost/var/mobile/Applications/A2142D8E-BC19-4E0B-A4C8-ABED4F7D4970/Documents/sample_iTunes.mov>

I use a sample .mov file from the Apple website, stored in the app's Documents directory.

I would like to know the duration of this video, for further processing, but when I examine the duration property, I get this:

(gdb) po asset.duration
There is no member named duration.

What am I doing wrong? Is there any other way to determine the duration of an AVAsset or AVAssetTrack?

TIA: John

Upvotes: 3

Views: 4874

Answers (2)

Hiren Panchal
Hiren Panchal

Reputation: 3023

For Swift 3.0 and above

import AVFoundation

  let asset = AVAsset(url: URL(fileURLWithPath: ("Your File Path here")!))
  let totalSeconds = Int(CMTimeGetSeconds(asset.duration))
  let minutes = totalSeconds / 60
  let seconds = totalSeconds % 60
  let mediaTime = String(format:"%02i:%02i",minutes, seconds)

Upvotes: 1

Stephen Hsu
Stephen Hsu

Reputation: 5187

Creating the asset, however, does not necessarily mean that it’s ready for use. To be used, an asset must have loaded its tracks. Load the asset with

[asset loadValuesAsynchronouslyForKeys:[NSArray arrayWithObject:tracksKey] completionHandler: ^{ // The completion block goes here. }];

And there should be a 'duration' key in the array.

When loading completes, get the duration with

Float64 durationSeconds = CMTimeGetSeconds([<#An asset#> duration]);

Upvotes: 7

Related Questions