| enrud |
06-06-2014 09:27 AM |
Re: I downloaded Netflix videos in HD, I can play off line,need a little help W/.key
Quote:
Originally Posted by shortkud
(Post 64739)
I found this 4.0 IPA and have tested it and it does work. Now I can't confirm it hasn't been tampered with in anyway so just FYI.
http://uploaded.net/file/32k1g1ne
The problem with this method while it does work, is that for me full quality ends up being 720x480. While with the latest version of netflix which results in the ISMA and ISMV files are very likely full 1080p from the file sizes at 100% quality.
The key method for the ISMV files is below. I can only find very little information about that keyformat but being that HLS streaming and ISMV/ISMA are pretty well known I imagine it has to be possible to decrypt the video in a similar fashion as the AES method. I'm not sure where the key might be stored though if it is on the iOS device at all.
#EXT-X-KEY:METHOD=ISO-23001-7,URI="+g=",KEYFORMAT="com.apple.streamingkeydeliv ery",KEYFORMATVERSIONS="1"
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Quote:
Originally Posted by ItsAngel
(Post 64894)
That's the super HD files from the newest Netflix IPA.
It uses KEYFORMAT: Com.apple.streamingkeydelivery
Not sure if the key is stored on the device or not.
The netflix downloader won't even play these files. It plays netflix 4.0 IPA< perfectly though
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KEYFORMAT: com.apple.streamingkeydelivery
The newest media files from netflix support Apple's fairplay DRM system (in addition to playready). The latest Netflix app on IOS 7 supports fairplay decryption. Part of that DRM negotiation occurs within the Netflix app and the final part occurs within the mediaplayer app. The "key" that is retrieved via the .m3u8 is actually an encrypted binary blob which the mediaplayer app uses to fetch the real key from the fairplay subsystem.
In other words, unlike the "crypt0.key", the fairplay mechanism never transfers the fairplay key in plain text.
Until UVD figures out how to get that key, downloading and caching won't work.
OTOH, it is relatively easy to get the (latest) Netflix app to fall back to the old mechanism for DRM (playready). This of course has the disadvantage that SuperHD streams will no longer be available.
Interestingly enough the new format (ismv/isma) does support playready, probably for the "everything else" that uses playready. However the netflix IOS app will only do fairplay DRM on the new format.
I would expect in the near future that netflix IOS app will probably only support fairplay, though. Currently fairplay is only enabled in IOS 7+. |