Analysis bilibili file directory cache folder

A file type

　　1. 1080P video content: m4s project

　　　　(Media-type) type encoding: 2

　　　　m4s project is bilibili storage of some of the larger or higher-resolution video files longer

　　　　You can use ffmpeg to connect, I can also be used to develop a GUI version ( https://github.com/Holit/ffmpegLinker )

　　2. Other content: blv project

　　　　(Media-type) type encoding: 1

　　　　blv fact, FLV file bilibili to change, you can use ffmpeg converter can also be directly called the expansion flv

　　　　Further, such a sequence of video files 0.blv, 1.blv, 2.blv like represent the order of the sequence, you can combine these flv files in order of 0,1,2,3,4

　　　　See also: https://www.littleqiu.net/archives/886

Second, the file directory Detailed

Android file cache location: the Data \ tv.danmaku.bili \ download \ ...
　　1. series of documents

　　　　\ list download \ s_ {id} \ { ep_id} \ sharpness information \ file [0 ~ N] .blv # playback file
　　　　　　　　　　　　　　　　　　　　　　　　　index.json # data file
　　　　　　　　　　　　　　　　　　　　entry.json # file entry (see below)
　　　　　　　　　　　　　　　　　　　　danmuku.xml # barrage file

　　　　Examples: \ download \ s_357 \ 249469 \ lua.flv480.bb2api.32 \ 0.blv ( cat and mouse (legacy) first episode, playing address: https://www.bilibili.com/bangumi/play / ep249469 )

{id} s_ series id: id indicates the localization position episodes, i.e. https://www.bilibili.com/bangumi/play/ss { id}
{ep_id} division number P: represents the number of the video file from a series id, i.e. https://www.bilibili.com/bangumi/play/ep { EP_ID}
Clarity of information:
- Generally lua. {Type}. {Api} beginning
  - type: the type comprising video and clarity, such as flv / flv480
  - api: temporarily unclear
document list
- Generally blv file
- Sorting according 0.blv 1.blv other, represents a sequence of video

　　2. Cache single-file
　　　　　　\ download \ av No. \ 1 \ sharpness information \ vedio.m4s # m4s file
　　　　　　　　　　　　　　　　　　　　　　audio.m4s　　　　　　
　　　　　　　　　　　　　　　　　　　　　　index.json data file #
　　　　　　　　　　　　　　　　entry.json # entry file

Third, the file structure
1.index.json (corresponding to M4S)
original video: https: //www.bilibili.com/video/av80959848

{ " Video " : # video content of the message
    [
        {
            " ID " : 112 ,            
             " the base_url " : " HTTPS: \ / \ / upos-hz-mirrorks3u.acgvideo.com \ / upgcxcode \ / 07 \ / 48 \ / 138 564 807 \ /138564807-1-30112.m4s E =? ig8euxZM2rNcNbdlhoNvNC8BqJIzNbfqXBvEuENvNC8aNEVEtEvE9IMvXBvE2ENvNCImNEVEIj0Y2J_aug859r1qXg8xNEVE5XREto8GuFGv2U7SuxI72X6fTr859IB_ & uipk =. 5 & NBS =. 1 & DEADLINE = 1,579,364,249 & Gen = playurl & OS = ks3u & OI = 3084983280 & TRID = dbd1c5a062ca4e59b6019c5a15522f4du & Platform = Android & upsig = 5ec2887544562b37b28841b7e0bab9ba & uparams = E, uipk, NBS, DEADLINE, Gen, OS, OI, TRID, Platform & MID = 68,089,222 " ,     
　　　　　　　　# original video acquisition address, Note: direct access will lead to 403 Forbidden error
            
            "backup_url":
            [
                "https:\/\/upos-sz-mirrorks3.bilivideo.com\/upgcxcode\/07\/48\/138564807\/138564807-1-30112.m4s?e=ig8euxZM2rNcNbdlhoNvNC8BqJIzNbfqXBvEuENvNC8aNEVEtEvE9IMvXBvE2ENvNCImNEVEIj0Y2J_aug859r1qXg8xNEVE5XREto8GuFGv2U7SuxI72X6fTr859IB_&uipk=5&nbs=1&deadline=1579364249&gen=playurl&os=ks3bv&oi=3084983280&trid=dbd1c5a062ca4e59b6019c5a15522f4du&platform=android&upsig=d2c5d34dcf612c4a00d6863a4036bf10&uparams=e,uipk,nbs,deadline,gen,os,oi,trid,platform&mid=68089222"
　　　　　　　　#备存的视频地址
            ],
            " Bandwidth " : 5973795 , # Bandwidth
             " CodecID " : . 7 ,
             " size " : 145 760 613 , # size, in bytes
             " MD5 " : " 58cbd8bc70f10f5ec708dfc06e37a83e " # the MD5 checksum
        }
    ],
" Audio " : The audio content of the message #
    [
        {
            "id":30280,
            "base_url":"https:\/\/upos-sz-mirrorhw.bilivideo.com\/upgcxcode\/07\/48\/138564807\/138564807_nb2-1-30280.m4s?e=ig8euxZM2rNcNbdlhoNvNC8BqJIzNbfqXBvEuENvNC8aNEVEtEvE9IMvXBvE2ENvNCImNEVEIj0Y2J_aug859r1qXg8xNEVE5XREto8GuFGv2U7SuxI72X6fTr859IB_&uipk=5&nbs=1&deadline=1579364249&gen=playurl&os=hwbv&oi=3084983280&trid=dbd1c5a062ca4e59b6019c5a15522f4du&platform=android&upsig=d787321f450cdbfa94d8e57da87c9412&uparams=e,uipk,nbs,deadline,gen,os,oi,trid,platform&mid=68089222",
            "backup_url":
            [
                "https:\/\/upos-sz-mirrorks3.bilivideo.com\/upgcxcode\/07\/48\/138564807\/138564807_nb2-1-30280.m4s?e=ig8euxZM2rNcNbdlhoNvNC8BqJIzNbfqXBvEuENvNC8aNEVEtEvE9IMvXBvE2ENvNCImNEVEIj0Y2J_aug859r1qXg8xNEVE5XREto8GuFGv2U7SuxI72X6fTr859IB_&uipk=5&nbs=1&deadline=1579364249&gen=playurl&os=ks3bv&oi=3084983280&trid=dbd1c5a062ca4e59b6019c5a15522f4du&platform=android&upsig=bf39193d876386e91d0ac1e7828204ea&uparams=e,uipk,nbs,deadline,gen,os,oi,trid,platform&mid=68089222"
            ],
            "bandwidth":319160,
            "codecid":0,
            "size":7790910,
            "md5":"902911e36938be7a4fedc7b705fade34"
        }
    ]
}

2.entry.json
original video: https: //www.bilibili.com/video/av80959848

{
     " MEDIA_TYPE " : 2 , # Media Type " has_dash_audio " : to true ,
     " is_completed " : to true , # download end
     " total_bytes " : 153 551 523 , # total size
     " downloaded_bytes " : 153 551 523 , # Size
     " title " : " [Korean small Mu × × Mummy t] in two unscientificのsuper shake a shoulder dance COINCIDANCE [] [] electron-positronのwonderful adventure " , # heading
     " type_tag " :"112 " ,
     " Cover " : " HTTP: \ / \ / i1.hdslb.com \ / bfs \ / Archive \ /381050f060f9a7c2c57e273ecf8e3758148cbc27.jpg " , " prefered_video_quality " : 112 , # Cover
     " guessed_total_bytes " : 0 ,
     " total_time_milli " : 195325 , the length of the video #, ms (milliseconds) units
     " danmaku_count " : 909 , the number of # barrage
     " time_update_stamp " : 1579357099610 ,
    # Update timestamp" Time_create_stamp " : 1,579,357,043,896 , # creation timestamp
     " Avid " : 80,959,848 , #av No.
     " SPID " : 0 ,
     " seasion_id " : 0 ,
     " page_data " : # page data (points P)
        {
        " CID " : 138 564 807 ,
         " Page " : . 1 ,
         " from " : " vupload " ,
         " Part " : " [t Korean small × Mu × mum in two scientificの] a super shoulder shaking dance [negative] [COINCIDANCE electronicのBizarre Adventure] " ,
         " VID " : " " ,
         " has_alias " : false ,
         " tid " : 124 ,
         "width":1920 , # width
         " height " : 1080 , # height
         " Rotate " : 0 , # rotation
         " DOWNLOAD_TITLE " : " Video cached completed " ,
         " download_subtitle " : " [Korean small Mu × mum t × in two] a scientificのsuper shoulder shaking dance] [[COINCIDANCE electron-positronのwonderful Adventure] 
                            [Korean small t × Mu × mum in two scientificの] a super shoulder shaking dance] [[COINCIDANCE electron-positronのwonderful Adventure} "
         }
}

3.danmuku.xml
original video: https: //www.bilibili.com/video/av80959848

<?xml version="1.0" encoding="UTF-8"?>
<i>
    <chatserver>chat.bilibili.com</chatserver>
    <chatid>138564807</chatid>
    <mission>0</mission>
    <maxlimit>1000</maxlimit>
    <state>0</state>
    <real_name>0</real_name>
    <source>k-v</source>
    <d p="15.90500,1,25,16777215,1577530864,0,43259dda,26418185093775364">前方高能</d>
</i>

Format Analysis:

Standard header, which contains basic information xml
<I> </ i> represents the first list

<?xml version="1.0" encoding="UTF-8"?>
<i></i>

    <chatserver>chat.bilibili.com</chatserver>
    <chatid>138564807</chatid>
    <mission>0</mission>
    <maxlimit>1000</maxlimit>
    <state>0</state>
    <real_name>0</real_name>
    <source>k-v</source>
    <d p= "15.90500,1,25,16777215,1577530864,0,43259dda, 26418185093775364" > front high-energy </ D >

chatsever: barrage library server address
chatid: Content connected barrage
maxlimit: barrage maximum number, the default is 1000
<d></d>：

　　In < D P = "15.90500,1,25,16777215,1577530864,0,43259dda, 26418185093775364" > front high-energy </ D > Example

　　15.90500 time unit appearing barrage seconds, five after the decimal point accuracy, i.e. 0.01ms
　　1 barrage mode
- 1..3 rolling barrage
- 4 bottom barrage
- 5 top barrage
- 6. Reverse Barrage
- 7 precise positioning
- 8 Advanced barrage
　　25 font size,　　
- 12 is very small,
- 16 special small,
- 18 hours,
- 25,
- 36 large,
- 45 great,
- 64 particularly large
　　16777215 font color to ten-digit HTML color prevail
　　1577530864 Unix timestamp format. Reference time 1970-1-1 08:00:00
　　0　　 barrage pond 　　
- 0 common pool
- 1 subtitles pool
- [2 special pool is currently special pool for senior barrage special]
43259dda "sender block this barrage" sender ID, used for functions
　　26418185093775364 barrage barrage in the database rowID, for "historical barrage" function.
SUMMARY front energetic barrage

Fourth, the analysis to be completed full

Analysis bilibili file directory cache folder

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