@Override
 protected void getContent(ByteBuffer byteBuffer) {
   writeVersionAndFlags(byteBuffer);
   IsoTypeWriter.writeUInt32(byteBuffer, entries.size());
   for (SampleEntry sampleEntry : entries) {
     IsoTypeWriter.writeUInt32(byteBuffer, sampleEntry.getSampleDelta());
     IsoTypeWriter.writeUInt16(byteBuffer, sampleEntry.getSubsampleCount());
     List<SampleEntry.SubsampleEntry> subsampleEntries = sampleEntry.getSubsampleEntries();
     for (SampleEntry.SubsampleEntry subsampleEntry : subsampleEntries) {
       if (getVersion() == 1) {
         IsoTypeWriter.writeUInt32(byteBuffer, subsampleEntry.getSubsampleSize());
       } else {
         IsoTypeWriter.writeUInt16(byteBuffer, l2i(subsampleEntry.getSubsampleSize()));
       }
       IsoTypeWriter.writeUInt8(byteBuffer, subsampleEntry.getSubsamplePriority());
       IsoTypeWriter.writeUInt8(byteBuffer, subsampleEntry.getDiscardable());
       IsoTypeWriter.writeUInt32(byteBuffer, subsampleEntry.getReserved());
     }
   }
 }