NewAVFileWriter binary writes nalus in annex b format to the given writer and audio buffers into a wav file.Note that you will have to call WriteWavHeader() on the audiofile when you are done to write a wav header and get a valid file.

AVFileWriter writes nalus into a file using 0x00000001 as a separator (h264 ANNEX B) and raw pcm audio into a wav fileNote that you will have to call WriteWavHeader() on the audiofile when you are done to write a wav header and get a valid file.