Testing av_ts_make_string()
NOPTS: NOPTS
0: 0
90000: 90000
-1: -1
INT64_MAX: 9223372036854775807
INT64_MIN+1: -9223372036854775807

Testing av_ts2str()
NOPTS: NOPTS
48000: 48000

Testing av_ts_make_time_string2()
NOPTS: NOPTS
90000 at 1/90000: 1
0 at 1/1000: 0
48000 at 1/48000: 1
44100 at 1/44100: 1
-90000 at 1/90000: -1

Testing av_ts_make_time_string()
5000 at 1/1000: 5
NOPTS: NOPTS