[HELP] MP4 can't encode with PCM, but why this MP4 file can?

[ssdde]

MP4 can't encode with PCM, but why this MP4 file can?

i upload this, please help me to research. many thanks.
https://drive.google.com/uc?id=1Y3NMUj-f...t=download

my question is two,

1) why this MP4 file can contain PCM audio tracks? The first track of the MP4 is what i want to encode with by Hybrid, but when i encode it displays MP4 PCM error. why this MP4 can contain PCM audios, i want to encode but can not?

2) the MP4 file have many PCM tracks, can all these tracks mux a 5.1 or 7.1 true HD sound track by Hybrid?
because some tracks have no dialogue voice, only are sounds like winds, sands, background noise.