MP4 PTS corruption

[jfx]

The attached patch fixes PTS corruption and other potential bugs when loading MP4 longer than 18 minutes. float is too small for time values measured in microseconds.

[mean]

you mean it's not accurate enough ?

[jfx]

float can safely store 24 bits only. This bug causes PTS<DTS errors etc.

[mean]

?
Float can store up to +-10^38 big number, but the accuracy is lousy
I'll assume it's a rounding issue