I want to Synthetic audio video,when i Synthetic audio video Two times in a row

sannies / mp4parser

A Java API to read, write and create MP4 files

Apache License 2.0

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I want to Synthetic audio video,when i Synthetic audio video Two times in a row #241

Open songdings opened 7 years ago

songdings commented 7 years ago

java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.coremedia.iso.boxes.MovieBox.getBoxes(java.lang.Class)' on a null object reference

Can you tell me what should i do ?