{"download":{"MP3":"http:\/\/downloads.cs50.net\/2012\/fall\/psets\/7\/walkthrough7.mp3","MP4 (240p)":"http:\/\/downloads.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-240p.mp4","MP4 (360p)":"http:\/\/downloads.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-360p.mp4","MP4 (720p)":"http:\/\/downloads.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-720p.mp4","MP4 (1080p)":"http:\/\/downloads.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-1080p.mp4"},"srt":{"afr":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/afr\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=ufaP4q2DMzjZx95jgMvbfQGnA8g%3D","alb":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/alb\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=dag9dIiNS%2FyoxVxwDIO%2BKkkxdtg%3D","ara":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ara\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=Ip1bZG%2B89ddG%2FTG60%2Bvr%2Bjo0Ga8%3D","aze":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/aze\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=erPDLO6biAT8sRGgOf2kpUVp1Pg%3D","baq":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/baq\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=9J4XOKKyoUrErHvXikLTQ86wXPI%3D","bel":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/bel\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=qaHRPCrg8M%2FG3ReQKbXVPrfQtLg%3D","ben":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ben\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=8aVJXyFqMaTkc339Nz8vW78%2BbJw%3D","bul":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/bul\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=wSOseGZqwNUNi0gFfc54jzj3zBQ%3D","cat":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/cat\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=B5FGXIXFDVTAdaUE8E3QCUdVMxU%3D","chi_hans":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/chi_hans\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=DcCLCt6zdKBK9oYaRZOPn56lXvY%3D","chi_hant":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/chi_hant\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=s1VButX32LIkbmvzkRsHHjTarKU%3D","cze":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/cze\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=UFTGICa0X%2Bcm%2FsInKba8PirYsdM%3D","dan":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/dan\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=F%2F6Wig8CwXHH2HJTFeKs0syfV2o%3D","dut":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/dut\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=NzZQp2fo7jMt%2BGyEZU1ODnFeG%2B8%3D","eng":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/eng\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=lP%2FXTtdMvt7qnuv4Lle5NGKU2eo%3D","epo":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/epo\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=5fabWt0lptusGCUKF7CgHLxPpes%3D","est":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/est\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=D8SkOFueucguTKCMufJQmnu8ft0%3D","fil":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/fil\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=I8iGcflbQYFYSYqN9PDHtcOZ8S4%3D","fin":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/fin\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=jlQ9EhGAQQIuj1DICgZNFzlMmjs%3D","fre_fr":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/fre_fr\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=GuoR0s8q4SufMXl1PdTzxJJKB7Q%3D","geo":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/geo\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=wvPToCDZxZvowapv7EDzOan5Ri0%3D","ger":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ger\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=8Zm52Gn8ikDWSg4dmGbBYL%2FFkHs%3D","gle":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/gle\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=jeR%2BIB6H7TlevDlrbJArVv9Ahnc%3D","glg":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/glg\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=hQ%2Bc7sFipT%2FVvVAyykCe46QjmhU%3D","gre":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/gre\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=XOvG%2Bv2leAhKJxz283kCOy5D4cI%3D","guj":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/guj\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=xbWjZipH8lEiqzgfMVW66mA%2FqY8%3D","hat":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/hat\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=9G5UjLuYZHN20wnlC5dnXIasFz0%3D","heb":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/heb\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=mUd%2BjXBdSRimktcEG7swp2ZqtZI%3D","hin":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/hin\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=CiPIPDX32qxjuBq7hE5XPMUYFuw%3D","hun":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/hun\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=%2Fc1UI0O6xiSQ7HTWakU8DaZ1eAg%3D","ice":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ice\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=NMmgMRimaAMphBAU6WiX1xFcpHs%3D","ind":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ind\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=NGml546ulK4Enq1Ml7q%2BuzPC0bA%3D","ita":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ita\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=8pAKAKUWylnQmDiY8PEj74xWj20%3D","jpn":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/jpn\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=Aiu0seKhwKo4l%2BIgEBkvSms7c5s%3D","kan":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/kan\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=E8WHtPAk6CMXfgZo9k0mIR5LPgc%3D","kor":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/kor\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=1rD4twOcpw10saUXKOBdNvjm6iU%3D","lat":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/lat\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=7rQ9urxIKNlWq3fdbClFRiZ2gcY%3D","lav":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/lav\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=ypE61nDY55q1%2FBWPYpt6rZzf3YQ%3D","lit":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/lit\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=mnO3ZDZ70%2FAQo7znIP9GMN%2BzVtc%3D","mac":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/mac\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=tYLyzz%2Bt0VDxyB1Z7%2FY4HKRYMXA%3D","may":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/may\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=KLf9CYnHbcjCUxGiBh6Ga5kQ3Qk%3D","mlt":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/mlt\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=SRWij2VTseHFPdpsgGZLm1dvun0%3D","nor":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/nor\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=s6g1PhxNwbIoWf5NufxrBVBJfXE%3D","per":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/per\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=kUvGg%2B5Be4z8jYRCyUxBPpyVkVw%3D","pol":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/pol\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=vhoYorcOrlXA4s4lBac%2FbzeWa24%3D","por_pt":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/por_pt\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=5kquhT%2F1zLls0Ac%2BznVgzJszvds%3D","rum":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/rum\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=v0l4sQTBcHweiWMXidYTVkFCzdw%3D","rus":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/rus\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=a8koiX0dXppxy0NR23qqOBp%2BQ0Q%3D","scc":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/scc\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=ZI%2BQh7%2BEAwXJuskV0tiA1eIQyKk%3D","scr":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/scr\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=tLdfRcvqR27UdjyL5yXGzFL5xfk%3D","slo":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/slo\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=PfN%2FDn529bWMbMkncQHOEnlSYXg%3D","slv":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/slv\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=g73NRMFt8cTJUKSlwrijJOyXTOo%3D","spa":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/spa\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=4NbrNvHjwL1VONXYgBG1mlIcf7Q%3D","swa":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/swa\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=lpz7ZWF00qXCvX4fcNpApgmekMo%3D","swe":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/swe\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=8omClXw84ChnqooEyVHQJF3cwzw%3D","tam":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/tam\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=d5pFJOgPhFIvb2iUIJbjqKuDj9U%3D","tel":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/tel\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=S5Uh4G7G0mRjvONhbUr7G%2BAyo%2B8%3D","ukr":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/ukr\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=XIIMDxjC%2F9fIw7j8UPbM8GOYS2A%3D","urd":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/urd\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=SxwkCCNs0tB%2B5EHWSXShJWd6RYg%3D","vie":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/vie\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=clKdeYfAG1KnlpCGRTfYzCm5xpU%3D","wel":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/wel\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=pWSAfRAHxesKcrTWJWkroaA2YtU%3D","yid":"http:\/\/cdn.cs50.net.s3.amazonaws.com\/2012\/fall\/psets\/7\/lang\/yid\/walkthrough7.srt?response-cache-control=no-cache&AWSAccessKeyId=AKIAJXVDJ7CBFTKPYYPQ&Expires=1384014753&Signature=Pjb3NdvZA5p2y7cXlEFf6yV3LR8%3D"},"thumbnail":"http:\/\/cdn.cs50.net\/2012\/fall\/psets\/7\/walkthrough7.png","streamUrl":"rtmp:\/\/stream.cs50.net\/cfx\/st\/","title":"Walkthrough: Problem Set 7","author":"Zamyla Chan","video":{"240p":{"height":240,"width":426.66665649414,"framerate":29.97,"bitrate":192472,"duration":2815,"path":"2012\/fall\/psets\/7\/walkthrough7-240p.mp4"},"360p":{"height":360,"width":640,"framerate":29.97,"bitrate":637091,"duration":2815,"path":"2012\/fall\/psets\/7\/walkthrough7-360p.mp4"},"720p":{"height":720,"width":1280,"framerate":29.97,"bitrate":1625532,"duration":2815,"path":"2012\/fall\/psets\/7\/walkthrough7-720p.mp4"},"1080p":{"height":1080,"width":1920,"framerate":29.97,"bitrate":2626043,"duration":2815,"path":"2012\/fall\/psets\/7\/walkthrough7-1080p.mp4"}},"torrents":{"MP3":"http:\/\/torrents.cs50.net\/2012\/fall\/psets\/7\/walkthrough7.mp3","MP4 (240p)":"http:\/\/torrents.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-240p.mp4","MP4 (360p)":"http:\/\/torrents.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-360p.mp4","MP4 (720p)":"http:\/\/torrents.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-720p.mp4","MP4 (1080p)":"http:\/\/torrents.cs50.net\/2012\/fall\/psets\/7\/walkthrough7-1080p.mp4"},"videoUrl":"http:\/\/cdn.cs50.net\/"}