3 ms·

The files are not encrypted. I mention the aspect of doing it with files that are already compressed and that I never expected it to work for that very reason.

The files are not encrypted. I mention the aspect of doing it with files that are already compressed and that I never expected it to work for that very reason. I just wanted to to for once actually do it and I don't see why you need to get so mad about that.

ccrush 12y ago
Unless you stripped the DRM from the files, yes, they are encrypted. At least according to the Wikipedia page on FairPlay [http://en.wikipedia.org/wiki/FairPlay http://en.wikipedia.org/wiki/FairPlay], all the iTunes files are encrypted. Also, wouldn't proving it doesn't work by setting up a deliberately flawed scenario amount to a bit of blogsturbation? Should I write an article about "finding out whether my computer will turn on even if it's unplugged"? Answer: no. But read my article about me TRYING it just to be sure. I think you should write a follow-up article where you splice together raw video files and include a similar segment in all the different files. Then, put that through the dedup test. I would actually be interested to see the ability of ZFS implementations to find worthwhile anchor points within files and do smart byte-level deduplication.
theoh 12y ago
I can see where he's coming from. Any differences in the data caused by encryption or compression of the final video files don't even come into play here unless the raw video data they are produced from is bit-for-bit identical from one episode to the next, say in a precise lossless format like CCIR 601. Maybe this is true at the production company but I wouldn't be surprised if it isn't. It would actually be somewhat interesting to know what the typical workflow at the production company is for gluing the title sequence together with the rest of the show. Your blog post doesn't do enough to clarify these issues.

3 ms·

The files are not encrypted. I mention the aspect of doing it with files that are already compressed and that I never expected it to work for that very reason.

by matrixagent 12y ago

ccrush 12y ago
Unless you stripped the DRM from the files, yes, they are encrypted. At least according to the Wikipedia page on FairPlay [http://en.wikipedia.org/wiki/FairPlay http://en.wikipedia.org/wiki/FairPlay], all the iTunes files are encrypted. Also, wouldn't proving it doesn't work by setting up a deliberately flawed scenario amount to a bit of blogsturbation? Should I write an article about "finding out whether my computer will turn on even if it's unplugged"? Answer: no. But read my article about me TRYING it just to be sure. I think you should write a follow-up article where you splice together raw video files and include a similar segment in all the different files. Then, put that through the dedup test. I would actually be interested to see the ability of ZFS implementations to find worthwhile anchor points within files and do smart byte-level deduplication.
theoh 12y ago
I can see where he's coming from. Any differences in the data caused by encryption or compression of the final video files don't even come into play here unless the raw video data they are produced from is bit-for-bit identical from one episode to the next, say in a precise lossless format like CCIR 601. Maybe this is true at the production company but I wouldn't be surprised if it isn't. It would actually be somewhat interesting to know what the typical workflow at the production company is for gluing the title sequence together with the rest of the show. Your blog post doesn't do enough to clarify these issues.