Omit data_offset of Track Run Box which picks value zero.
Omit data_offset of Track Run Box which picks value zero.

Track run that has such data_offset shall be the first one in the track fragment including that track run.

maki-rxrz/L-SMASH,mstorsjo/l-smash,dwbuiten/l-smash,silverfilain/L-SMASH,maki-rxrz/L-SMASH,silverfilain/L-SMASH,dwbuiten/l-smash,canbal/l-smash,silverfilain/L-SMASH,l-smash/l-smash,l-smash/l-smash,mstorsjo/l-smash,l-smash/l-smash,canbal/l-smash