exception

[eyotaCao]

java.lang.NullPointerException: Attempt to invoke virtual method 'long[] com.coremedia.iso.boxes.ChunkOffsetBox.getChunkOffsets()' on a null object reference
at com.googlecode.mp4parser.authoring.samples.DefaultMp4SampleList.(DefaultMp4SampleList.java:47)

this is my code 'MovieCreator.build(new FileDataSourceImpl(source))', ‘source’ is a accessable file in device, but it happen exception above