RF64
From Just Solve the File Format Problem
RF64 is an extended variant of BWF (Broadcast Wave Format), which is in turn a variant of WAV. It is a multichannel audio file format designed to remove size restrictions on earlier formats to allow files over 4 GB.
Format Information
The approach adopted is to define a new 64-bit based Resource Interchange File Format called RF64 that is identical to the original RIFF/WAVE format, except for the following changes:
- The ID ‘RF64’ is used instead of ‘RIFF’ in the first four bytes of the file
- A mandatory ‘ds64’ (data size 64) chunk is added, which has to be the first chunk after the “RF64 chunk”.
- The ‘ds64’ chunk has three mandatory 64-bit integer values, which replace three 32-bit fields of the RIFF/WAVE format:
- riffSize (replaces the RIFF size field)
- dataSize (replaces the size field of the ‘data’ chunk)
- sampleCount (replaces the sample count value in the ‘fact’ chunk)
