[trun] size=36 version=1 flags=000f01
 - sampleCount: 1
 - DataOffset: 314159
 - sample[1]: dur=1024 size=4 flags=02000000 (isLeading=0 dependsOn=2 isDependedOn=0 hasRedundancy=0 padding=0 isNonSync=false degradationPriority=0) compositionTimeOffset=-512
