avmutablecomposition insertEmptyTimeRange

Posted by smartfaceweb on Stack Overflow See other posts from Stack Overflow or by smartfaceweb
Published on 2012-06-30T03:10:01Z Indexed on 2012/06/30 3:15 UTC
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Filed under:

ios

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ios5

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avfoundation

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ios5-sdk

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avmutablecomposition

I have created an avmutablecomposition and tried to use insertEmptyTimeRange to generate 1 minute of silence. This doesn't appear to be working.

I have also tried creating an avmutablecompositiontrack using addMutableTrackWithMediaType:preferredTrackID: and then insertEmptyTimeRange on the track and still no success.

To give some background on my app, I allow users to add audio samples a timeline and then playback or export and this is working really well using the av classes. The problem is that I need to make sure that the audio is exactly 1 min (for example).

Regardless of the info about my specific app above, is it possible to insert an empty time range into a comp or comptrack?

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