AVAssetWriter Woes

Question

I\'m trying to use AVAssetWriter to write CGImages to a file to create a video from images.

I\'ve gotten this to work successfully in three different ways on the sim

Answer 1

I've found the solution to this issue.

If you want to have AVAudioPlayer and AVAssetWriter behave correctly together, you must have and audio session category that is 'mixable'.

You can use a category that is mixable like AVAudioSessionCategoryAmbient.

However, I needed to use AVAudioSessionCategoryPlayAndRecord.

You can set any category to be mixable by implementing this:

OSStatus propertySetError = 0;

UInt32 allowMixing = true;

propertySetError = AudioSessionSetProperty (
                       kAudioSessionProperty_OverrideCategoryMixWithOthers,  // 1
                       sizeof (allowMixing),                                 // 2
                       &allowMixing                                          // 3
                   );