I tried to use mp4box to remux MP4 files recorded by cameras SONY.
Most SONY cameras records PCM_S16BE 48000Hz, 2 channels with the audio tag `twos`.
SONY FX3 records PCM_S24BE 48000Hz, 2 channels with the audio tag `ipcm`.
I also saw some files with the audio tag `lpcm`.

mp4box from GPAC v2.0 worked with PCM 16-bit audio:
`mp4box -add video.h264 -add audio.wav -new mux.mp4`
produces a correct and playable MP4 file (audio.wav is PCM_S16LE, 48000Hz, 2 channels).

mp4box from GPAC v2.2+ (including the latest) creates a MP4 file with the correct audio handler `twos` but the audio data is missing at all. `stco`, `stsz`, etc. are empty for the audio track. 
Note most players are used the audio stream for sync with the timeline, so the resulting file is not playable. It is possible only to seek and see a static picture.

Note mp4box crashes on PCM 24-bit audio files.
mp4box failed with PCM audio
This is a GitHub Issue
repo:gpac
owner:gpac
Title : mp4box failed with PCM audio
Issue date:

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I tried to use mp4box to remux MP4 files recorded by cameras SONY.
Most SONY cameras records PCM_S16BE 48000Hz, 2 channels with the audio tag `twos`.
SONY FX3 records PCM_S24BE 48000Hz, 2 channels with the audio tag `ipcm`.
I also saw some files with the audio tag `lpcm`.

mp4box from GPAC v2.0 worked with PCM 16-bit audio:
`mp4box -add video.h264 -add audio.wav -new mux.mp4`
produces a correct and playable MP4 file (audio.wav is PCM_S16LE, 48000Hz, 2 channels).

mp4box from GPAC v2.2+ (including the latest) creates a MP4 file with the correct audio handler `twos` but the audio data is missing at all. `stco`, `stsz`, etc. are empty for the audio track. 
Note most players are used the audio stream for sync with the timeline, so the resulting file is not playable. It is possible only to seek and see a static picture.

Note mp4box crashes on PCM 24-bit audio files.
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