.IMA4 File Extension
- Developer by: Apple, Inc.
- Category: Audio and sound Files
What is an .IMA4 file?
.IMA4 is Apple QuickTime IMA4 encoded audio
The ima4 file extension is related to IMA ADPCM Apple Quicktime audio fomat.
QuickTime files can store either mono or stereo IMA ADPCM data. Files with IMA data contain the codec fourcc "ima4" in the audio stsd atom.
The files store the data in blocks of nibbles. The individual IMA samples are never interleaved; one block of IMA nibbles represents either all left-channel or all right-channel PCM samples.