convert annex-b format to normal nalu

h264.ts

    if (v.getUint32(offset + lengthSize) === 1) {
      const bytes = new Uint8Array(
        arrayBuffer,
        dataOffset + offset + 4,
        naluSize
      );
      const nals = parseNal({
        codec: Codec.H264,
        bytes
      });
      nals.nals.forEach(nal => {
        const writer = new BufferWriter(
          new ArrayBuffer(nal.naluData.length + 4)
        );
        writer.writeUint32(nal.naluData.length).write(nal.naluData);
        nalArray.push(new Uint8Array(writer.buf));
      });
    }