this is a command utility for parsing mpeg 4 file.

you can copy/modify/distribute these codes according to AOSP multimedia
framework's copyright items.

I copy these codes from AOSP multimedia framework, but with some changes
by myself.

REMEMBER ONLY for alpha usage and at your own risk.

and issues or contributions are welcomed.

below is sample usage.

$ ./gmpe4 /home/guohai/Downloads/VID_20130804_153806.mp4 
welcome using gmpe4, version: 0.9.0
mpeg4 file: /home/guohai/Downloads/VID_20130804_153806.mp4

box: ftyp @ 0 size 28
box: mdat @ 28 size 2792068
box: moov @ 2792096 size 1797
    box: mvhd @ 2792104 size 108
    box: udta @ 2792212 size 253
        box: cprt @ 2792220 size 18
        box: auth @ 2792238 size 18
        box: titl @ 2792256 size 18
        box: dscp @ 2792274 size 18
        box: perf @ 2792292 size 18
        box: gnre @ 2792310 size 18
        box: rtng @ 2792328 size 26
        box: clsf @ 2792354 size 24
        box: kywd @ 2792378 size 15
        box: loci @ 2792393 size 39
        box: albm @ 2792432 size 19
        box: yrrc @ 2792451 size 14
    box: trak @ 2792465 size 968
        box: tkhd @ 2792473 size 92
        box: mdia @ 2792565 size 868
            box: mdhd @ 2792573 size 32
            box: hdlr @ 2792605 size 45
            box: minf @ 2792650 size 783
                box: vmhd @ 2792658 size 20
                box: dinf @ 2792678 size 36
                    box: dref @ 2792686 size 28
                box: stbl @ 2792714 size 719
                    box: stsd @ 2792722 size 163
                        box: avc1 @ 2792738 size 147
                            box: avcC @ 2792824 size 41
                            box: btrt @ 2792865 size 20
                    box: stts @ 2792885 size 56
                    box: stsc @ 2792941 size 64
                    box: stsz @ 2793005 size 368
                    box: stco @ 2793373 size 32
                    box: stss @ 2793405 size 28
    box: trak @ 2793433 size 460
        box: tkhd @ 2793441 size 92
        box: mdia @ 2793533 size 360
            box: mdhd @ 2793541 size 32
            box: hdlr @ 2793573 size 45
            box: minf @ 2793618 size 275
                box: smhd @ 2793626 size 16
                box: dinf @ 2793642 size 36
                    box: dref @ 2793650 size 28
                box: stbl @ 2793678 size 215
                    box: stsd @ 2793686 size 91
                        box: mp4a @ 2793702 size 75
                            box: esds @ 2793738 size 39
                    box: stts @ 2793777 size 24
                    box: stsc @ 2793801 size 40
                    box: stsz @ 2793841 size 20
                    box: stco @ 2793861 size 32


summary of this presentation
  duration: 3 s
  created at: 2013-08-04 T 07:38:08 .000Z
  last modified at: 2013-08-04 T 07:38:08 .000Z
  has 2 track(s)
    video track info:
      width: 720
      height: 480
    audio track info:
      channels: 1
      sample rate: 16000 Hz