This particularly affected audio encoding, audio encoding previously
would count samples and use it to create an encoding timestamp, but
because I was using a standard integer (which is 32bit by default on
x86), it would max out at about 0x7FFFFFFF samples, which is about 12
hours of samples at 48000 sample rate.  After that, it would start going
into negative territory (overflowing).  By changing it to int64_t, it
will make it so that audio at 48000 samples per second would only be
able to overflow after about..  6.09 million years.  In other words,
this should fix the issue for good.