I am working on an implementation of one of the Android Test Cases regarding previewTexture recording with the new MediaCodec and MediaMuxer API\'s of Android 4.3.
I
As @fadden points out, this is a disk write issue that occurs mostly on devices with lower writing flash speeds or if you try to write to the SD card.
I have written a solution on how to buffer MediaMuxer's write in a similar question here.