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##EasyReadMore##

16 9月, 2011

[工作筆記] 578 youtube影片解析度研究

mp770能支援的格式只有MP4
youtube有支援mp4的像素格式為下列所示:

fmt=38 ( Original, MP4 )
fmt=37 ( HD1080p, MP4 )
fmt=22 ( HD720p, MP4 )
fmt=18 ( iPod, MP4 )

fmt=38 ( Original, MP4 )
fmt=37 ( HD1080p, MP4 )
fmt=45 ( HD720p, WebM )
fmt=22 ( HD720p, MP4 )
fmt=44 ( SD480p, WebM )
fmt=35 ( SD480p, FLV )
fmt=43 ( SD360p, WebM )
fmt=34 ( SD360p, FLV )
fmt=18 ( iPod, MP4 )
fmt=5  ( OldLQ, FLV )

下列為youtube影片下載網址:

url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v13.lscache1.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Cratebypass%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26itag%3D37%26ip%3D0.0.0.0%26signature%3D73423B0A17F8187477619B3DA08A42A35F0FAD97.1B24970AFDB51F6B95CB1FC3D09AB7C6C80C7D8B%26sver%3D3%26ratebypass%3Dyes%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26id%3De67e15de5184c86e\u0026quality=hd1080\u0026fallback_host=tc.v13.cache1.c.youtube.com\u0026type=video%2Fmp4%3B+codecs%3D%22avc1.64001F%2C+mp4a.40.2%22\u0026itag=37,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v14.lscache7.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Cratebypass%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26itag%3D45%26ip%3D0.0.0.0%26signature%3D19833B5BFBA7A0826419A8C67E9ADADA1ABB73B7.90A5A88A13B0D4D6F939D42F4E83C366B4CC1C13%26sver%3D3%26ratebypass%3Dyes%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26id%3De67e15de5184c86e\u0026quality=hd720\u0026fallback_host=tc.v14.cache7.c.youtube.com\u0026type=video%2Fwebm%3B+codecs%3D%22vp8.0%2C+vorbis%22\u0026itag=45,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v3.lscache8.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Cratebypass%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26itag%3D22%26ip%3D0.0.0.0%26signature%3D4AA3E1E9D90F4D59191D26C6F9699C09265821AD.543CFB09FB240A97FEF9BA194C47050AD6E77B29%26sver%3D3%26ratebypass%3Dyes%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26id%3De67e15de5184c86e\u0026quality=hd720\u0026fallback_host=tc.v3.cache8.c.youtube.com\u0026type=video%2Fmp4%3B+codecs%3D%22avc1.64001F%2C+mp4a.40.2%22\u0026itag=22,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v22.lscache2.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Cratebypass%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26itag%3D44%26ip%3D0.0.0.0%26signature%3D0BEBAB82CFE487E016607D3A808DF2A2483C77BC.68377AC7209C229E273D7E0EB6283F9062BD9281%26sver%3D3%26ratebypass%3Dyes%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26id%3D342f566ea7b8f050\u0026quality=large\u0026fallback_host=tc.v22.cache2.c.youtube.com\u0026type=video%2Fwebm%3B+codecs%3D%22vp8.0%2C+vorbis%22\u0026itag=44,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v12.lscache5.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Calgorithm%252Cburst%252Cfactor%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26algorithm%3Dthrottle-factor%26itag%3D35%26ip%3D0.0.0.0%26burst%3D40%26sver%3D3%26signature%3D66EC0A24C24E64B969552AB30D3EA352ACD9E972.31721622291A5D90AB4D70E9F9CBACBE24902B28%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26factor%3D1.25%26id%3D342f566ea7b8f050\u0026quality=large\u0026fallback_host=tc.v12.cache5.c.youtube.com\u0026type=video%2Fx-flv\u0026itag=35,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v13.lscache7.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Cratebypass%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26itag%3D43%26ip%3D0.0.0.0%26signature%3DC6A94E7AF507074DFA36DD47A32A8E8CB898461B.7A0EF7EAACA3A2B32436704C8CD0E16C66991C21%26sver%3D3%26ratebypass%3Dyes%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26id%3D342f566ea7b8f050\u0026quality=medium\u0026fallback_host=tc.v13.cache7.c.youtube.com\u0026type=video%2Fwebm%3B+codecs%3D%22vp8.0%2C+vorbis%22\u0026itag=43,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v10.lscache6.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Calgorithm%252Cburst%252Cfactor%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26algorithm%3Dthrottle-factor%26itag%3D34%26ip%3D0.0.0.0%26burst%3D40%26sver%3D3%26signature%3D516914FDB9B4D70A184BA40908BFC3FC63D82827.802CF5999C85AE7F164EB872D044C52C639EDFFE%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26factor%3D1.25%26id%3D342f566ea7b8f050\u0026quality=medium\u0026fallback_host=tc.v10.cache6.c.youtube.com\u0026type=video%2Fx-flv\u0026itag=34,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v20.lscache1.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Cratebypass%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26itag%3D18%26ip%3D0.0.0.0%26signature%3DBA79AD9468A3AC54FDFDE12FD653560CFB8B39B5.6639A301D43F1CDF154D8C818A3E39C81E590C60%26sver%3D3%26ratebypass%3Dyes%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26id%3D342f566ea7b8f050\u0026quality=medium\u0026fallback_host=tc.v20.cache1.c.youtube.com\u0026type=video%2Fmp4%3B+codecs%3D%22avc1.42001E%2C+mp4a.40.2%22\u0026itag=18,
url=http%3A%2F%2Fo-o.preferred.fareastone-khh1.v15.lscache5.c.youtube.com%2Fvideoplayback%3Fsparams%3Did%252Cexpire%252Cip%252Cipbits%252Citag%252Calgorithm%252Cburst%252Cfactor%252Coc%253AU0hQS1BUVl9FSkNOMF9ITlpJ%26algorithm%3Dthrottle-factor%26itag%3D5%26ip%3D0.0.0.0%26burst%3D40%26sver%3D3%26signature%3D7BFB220A4D9EB5621F33635AF7E39564367AF54D.4171FFD71B63DE0514630CE244D2C8D91BC7045C%26expire%3D1316098800%26key%3Dyt1%26ipbits%3D0%26factor%3D1.25%26id%3D342f566ea7b8f050\u0026quality=small\u0026

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