mp4（H264容器）的詳細文件格式分析

十六進制碼流分析：

????? ftyp Box
????? 00 00 00 1C:? size ,28,表示此BOX有28個字節，表示長度的四個字節也計算在內。以下同
????? 66 74 79 70:? type,表示BOX TYPE,此處為ftyp
????? 6D 70 34 32:? 可能是兼容的格式信息，/mp42
????? 00 00 00 00:? 可能是插入的空字節，/也可能是version ，flags
????? 6D 70 34 32:? 可能是兼容的格式信息，mp42/?? major-brand
????? 6D 70 34 31:? 可能是兼容的格式信息，mp41/ minor-version
????? 69 73 6F 6D:? isom, ftyp中的最后一個標識，compatible-brands[];? // to end of the? box

????? The brand ‘mp41’ is defined as identifying version 1 of this specification
????? (ISO/IEC 14496-1:2001), and the brand ‘mp42’ identifies this version of
????? the specification;? at least one of these brands shall appear in the
????? compatible-brands list in the file-type box, in all files conforming to
????? this specification.

????? moov Box
????? 00 03 B0 59:? size of moov.241753個字節
????? 6D 6F 6F 76:? moov

????? mvhd Box
????? 00 00 00 6C:? size,mvhd Box的大小為108個字節
????? 6D 76 68 64:? mvhd
????? 00 00 00 00:? version,flags
????? BE EE 87 C5:? creation-time創建文件的時間,是距離1904年1月1日0點的秒數
????? BE EE 87 C5:? modifiation-time修改文件的時間，
????? 00 01 5F 90:? timescale時標，時間刻度的單位，為1/90 000秒
????? 01 A8 61 B8:? duration持續時間
????? 00 01 00 00:? rate播放描述的等級
????? 01 00:??? volume播放時的音量
????? 00 00:??? 保留的16bits的0
????? 00 00 00 00:? 保留的32bits的0
????? 00 00 00 00:?? 保留的32bits的0
????? 00 01 00 00?? 00 00 00 00?? 00 00 00 00?? 00 00 00 00
????? 00 01 00 00?? 00 00 00 00?? 00 00 00 00?? 00 00 00 00
????? 40 00 00 00??? :? matrix給視頻提供的轉換矩陣
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00
????? 00 00 00 00? 00 00 00 00?? 00 00 00 00:? 6個32bits的pre-defined 的0
????? 00 01 00 CA:? next-track-ID下一個軌跡ID

????? iods Box
????? 00 00 00 21:? size of iods,33個字節
????? 69 6F 64 73:? iods, Initial Object Descriptor
????? 00 00 00 00:? version,flags
????? 10 13 00 4F:? 可能是OD, Object Descriptor
????? FF FF 0F FE:
????? FF 0E 04 00:
????? 00 00 01 0E:
????? 04 00 00 00:
????? 02

????? udta Box
????? 00 00 06 8F:? size of udta ,1679
????? 75 64 74 61:? udta,


????? uuid Box
????? 00 00 04 A9:? size of uuid,1193
????? 75 75 69 64:? uuid
????? F7 8C AA 0C 36 BE 4C E9 88 D2 03 C2 56 DA BE B2? :? 由于boxtype =
????? uuid而定義的16個字節的usertype

????? EES-3-0-410
????? VE
????? AE
????? AudioEncoder-2-1-11
????? V bitRate=2000000bps
????? V keyFrame Period In Ms=10000
????? V number of Pass=2
????? V progressive Interlaced=0
????? V rateControlMode=cbr
????? V smoothVsSharp=0
????? V sourceNature=natural
????? V useBFrame =false.此處表明本碼流沒有使用B幀
????? V videoEncoderType=mpeg4
????? V advVideo EncoderType=mpeg4
????? V allowBitRateUnderflow=false
????? V change Rgb Yuv Conversion=false
????? V setCustomBitmapSize=false
????? V useCustomPixedAspectRatio=false
????? V useExpertFeaturesASP=false
????? V useMotionFiltering=false
????? V useVideoPacket=false
????? V vbvSizeInMs=1000
????? V burnLogo=false
????? V changeframerate=false
????? V useColorAdjustment=false
????? V useCropFilter=false
????? V useScaleFilter=false
????? V useSpatialFilter=false
????? V useTimecodes=false

????? A audioEncoderType=aac
????? A bitRate=64000bps
????? A useAutomaticBandwidth=true
????? A useMS=true
????? A balanceLeftRight=0
????? A volumeInDB=0
????? starttime=0
????? stoptime=9223372036854775807，
????? MTUSize=1448
????? exportType=mp4
????? hinted=true
????? progressiveDownload=true
????? allowDebugInformationInStream=true
????? avoidQuickTime6Warnings=false
????? forceETV15compatibility=false
????? forcePlayerCompatibility=false
????? multiThreadedOptimization=0
????? openAVIWith=DirectShow
????? previewOnOff=1
????? previewlayout=0
????? showEncodingStatistics=true
????? .......................


????? hnti Box
????? 00 00 01 DE:size of hnti,478
????? 68 6E 74 69:hnti

????? rtp Box
????? 00 00 01 D6:size of rtp,470
????? 72 74 70 20:rtp
????? 73 64 70 20:sdp
????? a=mpeg4-iod:”data:application/mpeg4-iod;
????? base64

????? ................................

????? trak Box
????? 00 00 01 A4:? size of trak,420
????? 74 72 61 6B:? trak

????? tkhd Box
????? 00 00 00 5C:? size of tkhd,92
????? 74 6B 68 64:? tkhd, track head box
????? 00 00 00 01:? 00,version;? 00 00 01,track enable flags
????? BE EE 87 C5:? creation-time創建文件的時間
????? BE EE 87 C5:? modifiation-time修改文件的時間，兩個時間應該相同
????? 00 00 00 01:? track-ID
????? 00 00 00 00:? 保留的32bits的0
????? 01 A8 5E 16:? duration持續的時間
????? 00 00 00 00?? 00 00 00 00:? 保留的2個32bits的0
????? 00 00：layer 0
????? 00 00：pre-defined 0
????? 00 00：volume，as non audio，if audio ，0x0100
????? 00 00：reserved 0
????? 00 01 00 00?? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 00 01 00 00??? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 40 00 00 00??? ：matrix
????? 00 00 00 00：width，if track_is_visual 0x01400000 else 0
????? 00 00 00 00：height，if track_is_visual 0x00F00000 else 0


????? mdia Box
????? 00 00 01 28:? size of mdia,296
????? 6D 64 69 61:? mdia


????? mdhd Box
????? 00 00 00 20:? size of mdhd ,32
????? 6D 64 68 64:? mdhd
????? 00 00 00 00:? version
????? BE EE 87 C5:? creation-time
????? BE EE 87 C5:? modification-time
????? 00 00 03 E8:? timescale
????? 00 04 B7 17:? duration
????? 0? :pad
????? 10101 01110 00100:? 3個5bits的language
????? 00 00 ：pre-defined 0

?

????? hdlr Box
????? 00 00 00 21：size of hdlr,33
????? 68 64 6C 72:? hdlr
????? 00 00 00 00:? version
????? 00 00 00 00:? pre-defined 0
????? 6F 64 73 6D:? odsm,handler-type. ObjectDescriptorStream
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00 :? 3個reserved
????? 00? ：string? name

????? minf? Box
????? 00 00 00 DF:? size of minf,223
????? 6D 69 6E 66:? minf

????? nmhd Box
????? 00 00 00 0C:? size of nmhd,12
????? 6E 6D 68 64:? nmhd
????? 00 00 00 00:? version

????? dinf Box
????? 00 00 00 24:? size of dinf,36
????? 64 69 6E 66:? dinf

????? dref Box
????? 00 00 00 1C:? size of dref,28
????? 64 72 65 66:? dref
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count

????? url Box
????? 00 00 00 0C: size of url ,12
????? 75 72 6C 20:? url
????? 00 00 00 01:? location

????? stbl Box
????? 00 00 00 A7:? size of stbl,167
????? 73 74 62 6C:? stbl

????? stsd Box
????? 00 00 00 43:? size of stsd,67
????? 73 74 73 64:? stsd
????? 00 00 00 00:? version,flags
????? 00 00 00 01:? entry-count

????? mp4s Box
????? 00 00 00 33:? size of mp4s, 51
????? 6D 70 34 73:? mp4s
????? 00 00 00 00:? version
????? 00 00 00 01:? ES

????? esds Box
????? 00 00 00 23:? size of esds,35
????? 65 73 64 73:? esds
????? 00 00 00 00:? version
????? 03 15 00 00:
????? 00 04 0D 01:
????? 05 00 00 C8:
????? 00 00 00 00:
????? 00 00 00 00:
????? 06 01 02:

????? stts Box
????? 00 00 00 18:?? size of stts,24
????? 73 74 74 73:? stts
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 00 00 01:? sample-count
????? 00 04 B7 17:? sample-delta

????? stsc Box
????? 00 00 00 1C:? size of stsc ,28
????? 73 74 73 63:? stsc
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 00 00 01:? first-chunk
????? 00 00 00 01:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? stsz Box
????? 00 00 00 14:? size of stsz,20
????? 73 74 73 7A:? stsz
????? 00 00 00 00:? version
????? 00 00 00 12:? sample-size
????? 00 00 00 01:? sample-count

????? stco Box
????? 00 00 00 14:? size of stco,20
????? 73 74 63 6F:? stco
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 03 B0 7D:? chunk-offset

????? tref Box
????? 00 00 00 18:? size of tref,24
????? 74 72 65 66:? tref

????? mpod Box
????? 00 00 00 10:? size of mpod,16
????? 6D 70 6F 64:? mpod
????? 00 00 00 C9:
????? 00 00 00 65:

????? trak Box
????? 00 00 01? 91: size of trak,401
????? 74 72 61 6B:? trak

????? tkhd Box
????? 00 00 00 5C:? size of tkhd,92
????? 74 6B 68 64:? tkhd
????? 00 00 00 01:? 00,version;? 00 00 01,track enable flags
????? BE EE 87 C5:? creation-time創建文件的時間
????? BE EE 87 C5:? modifiation-time修改文件的時間，兩個時間應該相同
????? 00 00 00 02:? track-ID
????? 00 00 00 00:? 保留的32bits的0
????? 01 A8 5E 16:? duration持續的時間
????? 00 00 00 00?? 00 00 00 00:? 保留的2個32bits的0
????? 00 00：layer 0
????? 00 00：pre-defined 0
????? 00 00：volume，as non audio，if audio ，0x0100
????? 00 00：reserved 0
????? 00 01 00 00?? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 00 01 00 00??? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 40 00 00 00??? ：matrix
????? 00 00 00 00：width，if track_is_visual 0x01400000 else 0
????? 00 00 00 00：height，if track_is_visual 0x00F00000 else 0

????? mdia Box
????? 00 00 01 2D:size of mdia,301
????? 6D 64 69 61:mdia

????? mdhd Box
????? 00 00 00 20:? 32
????? 6D 64 68 64:mdhd
????? 00 00 00 00 :version,flags
????? BE EE 87 C5: creation-time創建文件的時間
????? BE EE 87C5: modifiation-time修改文件的時間，兩個時間應該相同
????? 00 00 03 E8: timescale時標
????? 00 04 B7 17: duration持續的時間
????? 55 C4:pad, 3個5bits的language
????? 00 00: pre-defined 0

????? hdlr Box
????? 00 00 00 21:size of hdlr ,33
????? 68 64 6C 72:? hdlr
????? 00 00 00 00:? version
????? 00 00 00 00:? pre-defined 0
????? 73 64 73 6D:? sdsm,handler-type, SceneDescriptionStream
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00 :? 3個reserved
????? 00? ：string? name

????? minf? Box
????? 00 00 00 E4:? size of minf,228
????? 6D 69 6E 66:? minf

????? nmhd Box
????? 00 00 00 0C:? size of nmhd,12
????? 6E 6D 68 64:? nmhd
????? 00 00 00 00:? version

????? dinf Box
????? 00 00 00 24:? size of dinf,36
????? 64 69 6E 66:? dinf

????? dref Box
????? 00 00 00 1C:? size of dref,28
????? 64 72 65 66:? dref
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count

????? url Box
????? 00 00 00 0C: size of url ,12
????? 75 72 6C 20:? url
????? 00 00 00 01:? location

????? stbl Box
????? 00 00 00 AC:? size of stbl,172
????? 73 74 62 6C:? stbl

????? stsd Box
????? 00 00 00 48:? size of stsd,72
????? 73 74 73 64:? stsd
????? 00 00 00 00:? version,flags
????? 00 00 00 01:? entry-count

????? mp4s Box
????? 00 00 00 38:? size of mp4s, 56
????? 6D 70 34 73:? mp4s
????? 00 00 00 00:? version
????? 00 00 00 01:? ES

????? esds Box
????? 00 00 00 28:? size of esds,40
????? 65 73 64 73:? esds
????? 00 00 00 00:? version
????? 03 1A 00 00:
????? 00 04 12 02:
????? 0D 00 00 20:
????? 00 00 00 00:
????? 00 00 00 00:
????? 05 03 00 00:
????? 40 06 01 02:

????? stts Box
????? 00 00 00 18:?? size of stts,24
????? 73 74 74 73:? stts
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 00 00 01:? sample-count
????? 00 04 B7 17:? sample-delta

????? stsc Box
????? 00 00 00 1C:? size of stsc ,28
????? 73 74 73 63:? stsc
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 00 00 01:? first-chunk
????? 00 00 00 01:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? stsz Box
????? 00 00 00 14:? size of stsz,20
????? 73 74 73 7A:? stsz
????? 00 00 00 00:? version
????? 00 00 00 18:? sample-size
????? 00 00 00 01:? sample-count

????? stco Box
????? 00 00 00 14:? size of stco,20
????? 73 74 63 6F:? stco
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 03 B0 8F:? chunk-offset


????? trak Box
????? 00 01 71 55:size of trak,
????? 74 72 61 6B:trak

????? tkhd Box
????? 00 00 00 5C:? size of tkhd,92
????? 74 6B 68 64:? tkhd, track head box
????? 00 00 00 01:? 00,version;? 00 00 01,track enable flags
????? BE EE 87 C5:? creation-time創建文件的時間
????? BE EE 87 C5:? modifiation-time修改文件的時間，兩個時間應該相同
????? 00 00 00 C9:? track-ID
????? 00 00 00 00:? 保留的32bits的0
????? 01 A8 61 B8:? duration持續的時間
????? 00 00 00 00?? 00 00 00 00:? 保留的2個32bits的0
????? 00 00：layer 0
????? 00 00：pre-defined 0
????? 00 00：volume，as non audio，if audio ，0x0100
????? 00 00：reserved 0
????? 00 01 00 00?? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 00 01 00 00??? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 40 00 00 00??? ：matrix
????? 02 D0 00 00：width，if track_is_visual 0x01400000 else 0
????? 01 E0 00 00：height，if track_is_visual 0x00F00000 else 0

????? mdia Box
????? 00 01 70 CD:? size of mdia
????? 6D 64 69 61:? mdia


????? mdhd Box
????? 00 00 00 20:? size of mdhd ,32
????? 6D 64 68 64:? mdhd
????? 00 00 00 00:? version
????? BE EE 87 C5:? creation-time
????? BE EE 87 C5:? modification-time
????? 00 01 5F 90:? timescale
????? 01 A8 61 B8:? duration
????? 0? :pad
????? 10101 01110 00100:? 3個5bits的language
????? 00 00 ：pre-defined 0

????? hdlr Box
????? 00 00 00 21：size of hdlr,33
????? 68 64 6C 72:? hdlr
????? 00 00 00 00:? version
????? 00 00 00 00:? pre-defined 0
????? 76 69 64 65:? vide,handler-type，表示此trak為視頻
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00 :? 3個reserved
????? 00? ：string? name


????? minf? Box
????? 00 01 70 84:? size of minf,94340
????? 6D 69 6E 66:? minf

????? vmhd Box
????? 00 00 00 14:? size of nmhd
????? 76 6D 68 64:? nmhd
????? 00 00 00 01:? version,flags
????? 00 00 00 00:
????? 00 00 00 00:

?


????? dinf Box
????? 00 00 00 24:? size of dinf,36
????? 64 69 6E 66:? dinf

????? dref Box
????? 00 00 00 1C:? size of dref,28
????? 64 72 65 66:? dref
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count

????? url Box
????? 00 00 00 0C: size of url ,12
????? 75 72 6C 20:? url
????? 00 00 00 01:? location

????? stbl Box
????? 00 01 70 44:? size of stbl
????? 73 74 62 6C:? stbl

????? stsd Box
????? 00 00 00 AC:? size of stsd,72
????? 73 74 73 64:? stsd
????? 00 00 00 00:? version,flags
????? 00 00 00 01:? entry-count

????? mp4v Box
????? 00 00 00 9C:? size of mp4v
????? 6D 70 34 76:? mp4v
????? 00 00 00 00:? version
????? 00 00 00 01:? ES
????? 00 00 00 00 00 00 :
????? 00 00 00 00 00 00 00 00 00 00 02 D0 01 E0 00 48
????? 00 00 00 48 00 00 00 00 00 00 00 01 00 00 00 00
????? 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
????? 00 00 00 00 00 00 00 00 00 00 00 00 00 18 FF FF

????? esds Box
????? 00 00 00 46:? size of esds
????? 65 73 64 73:? esds
????? 00 00 00 00:? version
????? 03 38 00 00:
????? 00 04 30 20:
????? 11 03 D0 90:
????? 00 1E 84 80:
????? 00 1E 84 80:
????? 05 21 00 00:
????? 01 B0 00 00:
????? 00 01 B5 0E:
????? A0 20 20 2F:
????? 00 00 01 00:
????? 00 00 01 20:
????? 00 C7 88 BA:
????? 98 51 68 43:
????? C1 46 3F 06:
????? 01 02 :

????? stts Box
????? 00 00 E7 90:?? size of stts
????? 73 74 74 73:? stts
????? 00 00 00 00:? version
????? 00 00 1C F0:? entry-count
????? 00 00 00 01:? sample-count
????? 00 00 0B BB:? sample-delta
????? 00 00 00 01
????? 00 00 11 97
????? 00 00 00 01
????? 00 00 0B BB
????? 00 00 00 01
????? 00 00 11 9A
????? ...........

????? stsc Box
????? 00 00 0E 8C:? size of stsc ,
????? 73 74 73 63:? stsc
????? 00 00 00 00:? version
????? 00 00 01 35:? entry-count

????? 00 00 00 01:? first-chunk
????? 00 00 00 15:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? 00 00 00 02
????? 00 00 00 18
????? 00 00 00 01

????? 00 00 00 03
????? 00 00 00 18
????? 00 00 00 01

????? 00 00 00 04
????? 00 00 00 18
????? 00 00 00 01
????? .............

????? stsz Box
????? 00 00 73 D8? size of stsz,20
????? 73 74 73 7A:? stsz
????? 00 00 00 00:? version
????? 00 00 00 00:? sample-size
????? 00 00 1C F1:? sample-count
????? 00 00 86
????? 24（從此開始，為當前chunk中每幀視頻數據的字節大小，此大小與offset相對應，用offset找到偏移的絕對地址（指向mdat
????? box中）后，從000001B6的第一個字節開始，加上對應的視頻字節數，就是本幀的大小。一個視頻chunk中首先是連續的視頻幀，然后也包含其他數據，暫不清楚視頻數據后面的數據類型）
????? 00 00 08 F9
????? 00 00 3B 04
????? 00 00 1D F2
????? 00 00 49 00
????? 00 00 60 A6
????? 00 00 2E 30
????? 00 00 33 F9
????? 00 00 22 19
????? 00 00 15 DB
????? 00 00 17 47
????? 00 00 1D 16
????? 00 00 3A 4A
????? 00 00 1C 1B
????? 00 00 2C EA
????? 00 00 37 28
????? 00 00 3D 70
????? 00 00 36 0B
????? 00 00 16 D0
????? 00 00 39 0F
????? 00 00 22 79
????? 第一個chunk中所有的視頻幀大小結束
????? 下面為當前chunk中視頻數據后面暫不清楚為什么數據類型的開始
????? 00 00 15 DB
????? 00 00 17 47
????? ................

?

????? stco Box
????? 00 00 04 E4:? size of stco,20
????? 73 74 63 6F:? stco
????? 00 00 00 00:? version
????? 00 00 01 35:? entry-count
????? 00 03 B0 A7:? chunk-offset（幀數據偏移的絕對地址（指向mdat
????? box中），此處為視頻數據，一個chunk約包含1S的數據，但不固定）
????? 00 07 F1 5D
????? 00 0B 58 D7
????? 00 0E 58 9D
????? 00 11 A5 3E
????? 00 15 11 0B
????? 00 18 15 4E

?

????? stss Box
????? 00 00 00 B8:size
????? 73 74 73 73:stss
????? 00 00 00 00:version,flags
????? 00 00 00 2A:entry_count
????? 00 00 00 01
????? 00 00 00 12
????? 00 00 00 38
????? 00 00 01 63
????? 00 00 02 8E
????? 00 00 03 B9
????? 00 00 04 E4
????? 00 00 05 83
????? 00 00 06 AE
????? 00 00 07 26
????? 00 00 07 47
????? 00 00 07 68
????? 00 00 08 67
????? 00 00 08 73


????? ...............

????? udta Box
????? 00 00 00 24:
????? 75 64 74 61:

????? uuid Box
????? 00 00 00 1C:? size of uuid
????? 75 75 69 64:? uuid
????? F7 8C AA 0C 36 BE 4C E9 87 D2 03 C2 56 DA BE B2? :? 由于boxtype =
????? uuid而定義的16個字節的usertype
????? 與前面不同
????? 00 01 19 9A

????? trak Box
????? 00 01 72 D5
????? 74 72 61 6B

????? tkhd Box
????? 00 00 00 5C:? size of tkhd,92
????? 74 6B 68 64:? tkhd, track head box
????? 00 00 00 00:? 00,version;? 00 00 00,track enable flags
????? BE EE 87 C5:? creation-time創建文件的時間
????? BE EE 87 C5:? modifiation-time修改文件的時間，兩個時間應該相同
????? 00 01 00 C9:? track-ID
????? 00 00 00 00:? 保留的32bits的0
????? 01 A8 61 B8:? duration持續的時間
????? 00 00 00 00?? 00 00 00 00:? 保留的2個32bits的0
????? 00 00：layer 0
????? 00 00：pre-defined 0
????? 00 00：volume，as non audio，if audio ，0x0100
????? 00 00：reserved 0
????? 00 01 00 00?? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 00 01 00 00??? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 40 00 00 00??? ：matrix
????? 00 00 00 00：width，if track_is_visual 0x01400000 else 0
????? 00 00 00 00：height，if track_is_visual 0x00F00000 else 0

????? mdia Box
????? 00 01 70 5D:? size of mdia
????? 6D 64 69 61:? mdia


????? mdhd Box
????? 00 00 00 20:? size of mdhd ,32
????? 6D 64 68 64:? mdhd
????? 00 00 00 00:? version
????? BE EE 87 C5:? creation-time
????? BE EE 87 C5:? modification-time
????? 00 01 5F 90:? timescale
????? 01 A8 61 B8:? duration
????? 0? :pad
????? 10101 01110 00100:? 3個5bits的language
????? 00 00 ：pre-defined 0


????? hdlr Box
????? 00 00 00 21：size of hdlr,33
????? 68 64 6C 72:? hdlr
????? 00 00 00 00:? version
????? 00 00 00 00:? pre-defined 0
????? 68 69 6E 74:? hint,handler-type
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00 :? 3個reserved
????? 00? ：string? name

????? minf? Box
????? 00 01 70 14:? size of minf
????? 6D 69 6E 66:? minf

????? hmhd Box
????? 00 00 00 1C
????? 68 6D 68 64
????? 00 00 00 00
????? 05 A8 05 3B
????? 00 1E 84 80
????? 00 18 70 4E
????? 00 1E 84 80


????? dinf Box
????? 00 00 00 24:? size of dinf,36
????? 64 69 6E 66:? dinf

????? dref Box
????? 00 00 00 1C:? size of dref,28
????? 64 72 65 66:? dref
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count

????? url Box
????? 00 00 00 0C: size of url ,12
????? 75 72 6C 20:? url
????? 00 00 00 01:? location

????? stbl Box
????? 00 01 6F CC:? size of stbl,
????? 73 74 62 6C:? stbl

????? stsd Box
????? 00 00 00 34:? size of stsd,
????? 73 74 73 64:? stsd
????? 00 00 00 00:? version,flags
????? 00 00 00 01:? entry-count


????? rtp
????? 00 00 00 24
????? 72 74 70 20:rtp
????? 00 00 00 00
????? 00 00 00 01
????? 00 01 00 01
????? 00 00 05 A8


????? tims
????? 00 00 00 0C
????? 74 69 6D 73
????? 00 01 5F 90

????? stts
????? 00 00 E7 90
????? 73 74 74 73
????? 00 00 00 00:? version
????? 00 00 1C F0:? entry-count
????? 00 00 00 01:? sample-count
????? 00 00 0B BB:? sample-delta
????? 00 00 00 01
????? 00 00 11 97
????? 00 00 00 01
????? 00 00 0B BB
????? 00 00 00 01
????? 00 00 11 9A
????? ..................

????? stsc
????? 00 00 0E 8C
????? 73 74 73 63
????? 00 00 00 00:? version
????? 00 00 01 35:? entry-count

????? 00 00 00 01:? first-chunk
????? 00 00 00 18:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? 00 00 00 02
????? 00 00 00 18
????? 00 00 00 01

????? 00 00 00 03
????? 00 00 00 18
????? 00 00 00 01

????? ..............

?


????? stsz Box
????? 00 00 73 D8:? size of stsz,20
????? 73 74 73 7A:? stsz
????? 00 00 00 00:? version
????? 00 00 00 00:? sample-size
????? 00 00 1C F1:? sample-count

????? ..................

????? stco
????? 00 00 04 E4
????? 73 74 63 6F
????? 00 00 00 00:? version
????? 00 00 01 35:? entry-count
????? 00 07 B1 24:chunk_offset
????? 00 0B 20 81


????? ..............

????? stss
????? 00 00 00 B8
????? 73 74 73 73
????? .............

????? tref
????? 00 00 00 14
????? 74 72 65 66

????? hint
????? 00 00 00 0C
????? 68 69 6E 74
????? 00 00 00 C9

????? udta
????? 00 00 02 00
????? 75 64 74 61

????? hinf
????? 00 00 00 E2
????? 68 69 6E 66

????? trpy
????? 00 00 00 10
????? 74 72 70 79
????? 00 00 00 00
????? 03 B8 8E 51

????? nump
????? 00 00 00 10
????? 6E 75 6D 70
????? 00 00 00 00
????? 00 00 B6 0A

????? tpyl
????? 00 00 00 10
????? 74 70 79 6C
????? 00 00 00 00
????? 03 B0 05 D9

????? totl
????? 00 00 00 0C
????? 74 6F 74 6C
????? 03 B8 8E 51

????? npck
????? 00 00 00 0C
????? 6E 70 63 6B
????? 00 00 B6 0A

????? tpay
????? 00 00 00 0C
????? 74 70 61 79
????? 03 B0 05 D9

????? dmed
????? 00 00 00 10
????? 64 6D 65 64
????? 00 00 00 00
????? 03 B0 05 B8

????? dimm
????? 00 00 00 10
????? 64 69 6D 6D
????? 00 00 00 00
????? 00 00 00 21

????? drep
????? 00 00 00 10
????? 64 72 65 70
????? 00 00 00 00
????? 00 00 00 00

????? tmin
????? 00 00 00 0C
????? 74 6D 69 6E
????? FF FF FC 18

????? tmax
????? 00 00 00 0C
????? 74 6D 61 78
????? 00 00 00 00

????? pmax
????? 00 00 00 0C
????? 70 6D 61 78
????? 00 00 05 A8

????? dmax
????? 00 00 00 0C
????? 64 6D 61 78
????? 00 00 00 32

????? payt
????? 00 00 00 26
????? 70 61 79 74
????? 00 00 00 60 19
????? a=rtpmap:96 MP4V-ES/90000
????? hnti
????? sdp m=video 0 RTP/AVP 96
????? b=AS:2048
????? a=rtpmap:96 MP4V-ES/90000
????? a=fmtp:96 profile-level-id=254;config=
????? a=cliprect:0,0,480,720
????? a=mpeg4-esid:201
????? a=x-envivio-verid:0001199A
????? a=control:trackID=65737

????? trak
????? 00 00 AB 60
????? 74 72 61 6B

????? tkhd Box
????? 00 00 00 5C:? size of tkhd,92
????? 74 6B 68 64:? tkhd
????? 00 00 00 01:? 00,version;? 00 00 01,track enable flags
????? BE EE 87 C5:? creation-time創建文件的時間
????? BE EE 87 C5:? modifiation-time修改文件的時間，兩個時間應該相同
????? 00 00 00 65:? track-ID
????? 00 00 00 00:? 保留的32bits的0
????? 01 A8 07 40:? duration持續的時間
????? 00 00 00 00?? 00 00 00 00:? 保留的2個32bits的0
????? 00 00：layer 0
????? 00 00：pre-defined 0
????? 00 00：volume，as non audio，if audio ，0x0100
????? 00 00：reserved 0
????? 00 01 00 00?? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 00 01 00 00??? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 40 00 00 00??? ：matrix
????? 00 00 00 00：width，if track_is_visual 0x01400000 else 0
????? 00 00 00 00：height，if track_is_visual 0x00F00000 else 0

????? mdia Box
????? 00 00 AA D8:size of mdia,301
????? 6D 64 69 61:mdia

????? mdhd Box
????? 00 00 00 20:? 32
????? 6D 64 68 64:mdhd
????? 00 00 00 00 :version,flags
????? BE EE 87 C5: creation-time創建文件的時間
????? BE EE 87C5: modifiation-time修改文件的時間，兩個時間應該相同
????? 00 00 7D 00: timescale時標
????? 00 96 C4 00: duration持續的時間
????? 55 C4:pad, 3個5bits的language
????? 00 00: pre-defined 0

????? hdlr Box
????? 00 00 00 21:size of hdlr ,33
????? 68 64 6C 72:? hdlr
????? 00 00 00 00:? version
????? 00 00 00 00:? pre-defined 0
????? 73 6F 75 6E:? soun,handler-type,表示此trak為音頻
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00 :? 3個reserved
????? 00? ：string? name

?

????? minf Box
????? 00 00 AA 8F:size of minf
????? 6D 69 6E 66:minf

????? smhd Box
????? 00 00 00 10:size of smhd
????? 73 6D 68 64:smhd
????? 00 00 00 00:version
????? 00 00 :balance,
????? balance is a fixed-point 8.8 number that places mono audio tracks in a
????? stereo space; 0 is center (the normal value); full left is -1.0 and full
????? right is 1.0.
????? 00 00:reserved

????? dinf Box
????? 00 00 00 24:size of dinf
????? 64 69 6E 66:dinf

????? dref Box
????? 00 00 00 1C:? size of dref,28
????? 64 72 65 66:? dref
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count


????? url Box
????? 00 00 00 0C: size of url ,12
????? 75 72 6C 20:? url
????? 00 00 00 01:? location


????? stbl Box
????? 00 00 AA 53:? size of stbl
????? 73 74 62 6C:? stbl

????? stsd Box
????? 00 00 00 5B:? size of stsd
????? 73 74 73 64:? stsd
????? 00 00 00 00:? version,flags
????? 00 00 00 01:? entry-count


????? mp4a Box
????? 00 00 00 4B:
????? 6D 70 34 61:mp4a
????? 00 00 00 00:version
????? 00 00 00 01:ES
????? 00 00 00 00
????? 00 00 00 00
????? 00 02 00 10
????? 00 00 00 00
????? 7D 00 00 00

????? esds box
????? 00 00 00 27
????? 65 73 64 73
????? 00 00 00 00:? version
????? 03 19 00 00:
????? 00 04 11 40:
????? 15 00 06 00:
????? 00 00 FA 00:
????? 00 00 FA 00:
????? 05 02 12 90:
????? 06 01 02 :

????? stts
????? 00 00 00 18
????? 73 74 74 73:stts
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 00 25 B1:? sample-count
????? 00 00 04 00:? sample-delta

????? stsc Box
????? 00 00 0E 38:? size of stsc?
????? 73 74 73 63:? stsc
????? 00 00 00 00:? version
????? 00 00 01 2E:? entry-count
????? 00 00 00 01:? first-chunk
????? 00 00 00 20:? samples-per-chunk
????? 00 00 00 01:? sample-description-index
????? 00 00 00 02
????? 00 00 00 20
????? 00 00 00 01
????? 00 00 00 03
????? 00 00 00 20
????? 00 00 00 01
????? 00 00 00 04
????? 00 00 00 20
????? 00 00 00 01

????? ..........................

????? stsz box
????? 00 00 96 D8:? size of stsz,
????? 73 74 73 7A:? stsz
????? 00 00 00 00:? version
????? 00 00 00 00:? sample-size
????? 00 00 25 B1:? sample-count

????? .................................

????? stco
????? 00 00 04 C8
????? 73 74 63 6F:stco
????? 00 00 00 00:? version
????? 00 00 01 2E:? entry-count
????? 00 07 C9 54:? chunk-offset
????? 00 0B 32 0D
????? 00 0E 32 9B
????? ............................

????? udta box
????? 00 00 00 24
????? 75 64 74 61

????? uuid
????? 00 00 00 1C
????? 75 75 69 64
????? F7 8C AA 0C 36 BE 4C E9 87 D2 03 C2 56 DA BE
????? B2? :? 由于boxtype = uuid而定義的16個字節的usertype
????? 00 01 19 9A


????? trak
????? 00 00 16 76
????? 74 72 61 6B:? trak

????? tkhd Box
????? 00 00 00 5C:? size of tkhd,92
????? 74 6B 68 64:? tkhd, track head box
????? 00 00 00 00:? 00,version;? 00 00 00,track enable flags
????? BE EE 87 C5:? creation-time創建文件的時間
????? BE EE 87 C5:? modifiation-time修改文件的時間，兩個時間應該相同
????? 00 01 00 65:? track-ID
????? 00 00 00 00:? 保留的32bits的0
????? 01 A8 07 40:? duration持續的時間
????? 00 00 00 00?? 00 00 00 00:? 保留的2個32bits的0
????? 00 00：layer 0
????? 00 00：pre-defined 0
????? 00 00：volume，as non audio，if audio ，0x0100
????? 00 00：reserved 0
????? 00 01 00 00?? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 00 01 00 00??? 00 00 00 00
????? 00 00 00 00??? 00 00 00 00??? 40 00 00 00??? ：matrix
????? 00 00 00 00：width，if track_is_visual 0x01400000 else 0
????? 00 00 00 00：height，if track_is_visual 0x00F00000 else 0

????? mdia box
????? 00 00 13 F9
????? 6D 64 69 61

????? mdhd box
????? 00 00 00 20
????? 6D 64 68 64:mdhd
????? 00 00 00 00
????? BE EE 87 C5
????? BE EE 87 C5
????? 00 00 7D 00:timescale
????? 00 96 C4 00:duration
????? 55 C4=
????? 0? :pad
????? 10101 01110 00100:? 3個5bits的language
????? 00 00 ：pre-defined 0


????? hdlr box
????? 00 00 00 21：size of hdlr,33
????? 68 64 6C 72:? hdlr
????? 00 00 00 00:? version
????? 00 00 00 00:? pre-defined 0
????? 68 69 6E 74:? hint,handler-type
????? 00 00 00 00?? 00 00 00 00?? 00 00 00 00 :? 3個reserved
????? 00? ：string? name

?


????? minf? Box
????? 00 00 13 B0:? size of minf
????? 6D 69 6E 66:? minf

????? hmhd box
????? 00 00 00 1C
????? 68 6D 68 64
????? 00 00 00 00
????? 05 A8 :maxPDU
????? 01 0C :avgPDU
????? 00 00 FA 00: maxbitrate
????? 00 00 FA 00: avgbitrate
????? 00 00 FA 00:此處應該為保留的0，有誤？

????? dinf Box
????? 00 00 00 24:? size of dinf,36
????? 64 69 6E 66:? dinf

????? dref Box
????? 00 00 00 1C:? size of dref,28
????? 64 72 65 66:? dref
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count

????? url Box
????? 00 00 00 0C: size of url ,12
????? 75 72 6C 20:? url
????? 00 00 00 01:? location


????? stbl box
????? 00 00 13 68
????? 73 74 62 6C:? stbl

????? stsd Box
????? 00 00 00 34:? size of stsd,67
????? 73 74 73 64:? stsd
????? 00 00 00 00:? version,flags
????? 00 00 00 01:? entry-count

????? rtp box
????? 00 00 00 24
????? 72 74 70 20:rtp
????? 00 00 00 00
????? 00 00
????? 00 01: hinttrackversion
????? 00 01: highestcompatibleversion
????? 00 01 00 00 : maxpacketsize
????? 05 A8: additionaldata[]

?

????? tims box
????? 00 00 00 0C
????? 74 69 6D 73
????? 00 00 7D 00: timescale

?


????? stts box
????? 00 00 00 18
????? 73 74 74 73
????? 00 00 00 00:? version
????? 00 00 00 01:? entry-count
????? 00 00 25 B1:? sample-count
????? 00 00 04 00:? sample-delta

????? stsc Box
????? 00 00 0E 38:? size of stsc
????? 73 74 73 63:? stsc
????? 00 00 00 00:? version
????? 00 00 01 2E:? entry-count
????? 00 00 00 01:? first-chunk
????? 00 00 00 20:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? 00 00 00 02:? first-chunk
????? 00 00 00 20:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? 00 00 00 03:? first-chunk
????? 00 00 00 20:? samples-per-chunk
????? 00 00 00 01:? sample-description-index

????? 00 00 00 04:? first-chunk
????? 00 00 00 20:? samples-per-chunk
????? 00 00 00 01:? sample-description-index


????? .............................

????? stsz Box
????? 00 00 00 14:? size of stsz,20
????? 73 74 73 7A:? stsz
????? 00 00 00 00:? version
????? 00 00 00 30:? sample-size
????? 00 00 25 B1:? sample-count

????? stco Box
????? 00 00 04 C8:? size of stco
????? 73 74 63 6F:? stco
????? 00 00 00 00:? version
????? 00 00 01 2E:? entry-count
????? 00 07 EB 5D:? chunk-offset
????? 00 0B 52 D7
????? ...........................

????? tref Box
????? 00 00 00 14:? size of tref,
????? 74 72 65 66:? tref

????? hint box
????? 00 00 00 0C
????? 68 69 6E 74
????? 00 00 00 65:track-IDS

????? udta box
????? 00 00 02 05
????? 75 64 74 61

????? hinf box
????? 00 00 00 EA
????? 68 69 6E 66

????? trpy Box
????? 00 00 00 10:size of trpy,16
????? 74 72 70 79:trpy
????? 00 00 00 00 00 28 0E DE: uint(64)? bytessent;?? // total bytes sent,
????? including 12-byte RTP headers


????? nump Box
????? 00 00 00 10:size of nump,16
????? 6E 75 6D 70:nump
????? 00 00 00 00 00 00 25 B1: uint(64)? packetssent

????? tpyl Box
????? 00 00 00 10:size of tpyl,16
????? 74 70 79 6C:tpyl
????? 00 00 00 00 00 26 4A 92: uint(64)? bytessent;? // total bytes sent, not
????? including RTP headers


????? totl Box
????? 00 00 00 0C:size of totl,12
????? 74 6F 74 6C:totl
????? 00 28 0E DE: bytessent; }? // total bytes sent, including 12-byte RTP
????? headers

????? npck Box
????? 00 00 00 0C:size of npck,12
????? 6E 70 63 6B:npck
????? 00 00 25 B1: packetssent; }? // total packets sent

????? tpay Box
????? 00 00 00 0C:size of tpay,12
????? 74 70 61 79:tpay
????? 00 26 4A 92: bytessent; }? // total bytes sent, not including RTP headers?? dmed Box
????? 00 00 00 10:16
????? 64 6D 65 64:dmed
????? 00 00 00 00 00 25 B3 CE: bytessent; }? // total bytes sent from media??? tracks

????? dimm Box
????? 00 00 00 10:16
????? 64 69 6D 6D:dimm
????? 00 00 00 00 00 00 96 C4: bytessent; }? // total bytes sent immediate mode

?

????? drep Box
????? 00 00 00 10:16
????? 64 72 65 70:drep
????? 00 00 00 00 00 00 00 00: bytessent; }? // total bytes in repeated packets


????? tmin Box
????? 00 00 00 0C:12
????? 74 6D 69 6E: tmin
????? FF FF FF 40: time;???? // smallest relative transmission time, milliseconds


????? tmax Box
????? 00 00 00 0C:12
????? 74 6D 61 78:tmax
????? 00 00 00 00: time; }??? // largest relative transmission time,milliseconds


????? pmax Box
????? 00 00 00 0C:12
????? 70 6D 61 78:pamx
????? 00 00 01 45: bytes; }????? // largest packet sent, including RTP header


????? dmax Box
????? 00 00 00 0C:12
????? 64 6D 61 78:dmax
????? 00 00 00 20: time; }????? // longest packet duration, milliseconds

????? payt Box
????? 00 00 00 2E:
????? 70 61 79 74:payt
????? 00 00 00 61: payloadID
????? 21 : count,
????? a=rtpmap:97 mpeg4-generic/32000/2


????? hnti Box
????? 00 00 01 13:
????? 68 6E 74 69:hnti

????? sdp Box
????? 00 00 01 0B:
????? 73 64 70 20:sdp
????? sdptext[]:
????? m=audio 0 RTP/AVP 97
????? b=AS:75
????? a=rtpmap:97 mpeg4-generic/32000/2
????? a=fmtp:97 profile-level-id =15
????? config=1290
????? streamtype=5
????? mode=AAC-hbr
????? SizeLength=13
????? IndexLength=3
????? IndexDeltaLength=3
????? a=mpeg4-esid:101
????? a=x-envivio=verid:0001199A
????? a=control:trackID=65637

????? mdat box
????? 03 F1 27 F4
????? 6D 64 61 74:mdat


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