Let's my perceptions!
I am using this application a week and already removed the DRM from 6 movies that I bought and all worked as expected. However, I have noticed some features that I'll show you below! Overall I consider this application very good and recommend it to anyone who wants to remove the DRM from your iTunes files easily and practice!
Let's start with the screenshots that I withdraw the DRM from a movie purchased from the iTunes Store:
Now let's peculiar issues that led me to not give full marks to this application (at least in this version 2.1.8):
Unlike the Requiem 4.1 (which unfortunately doesn't work anymore in new Macs) the final file generated by TunesKit 2.1.8 doesn't have the same amount of bits the Original file! As this is the principle of encryption removal, it was expected that the final file (DRM-free) had EXACTLY the same size as the original file. In Requiem 4.1 THIS HAPPENS but unfortunately not the case with this version 2.1.8 of the TunesKit!
See the image below where I compare the Original file from the iTunes Store (left side) with the final file (DRM-free) from TunesKit (right side). Notice also that the containers were changed from .m4v to .mp4 (it should be optional but this version still is not).
Doing a quick account we note that the final file (DRM-free) has 112,104,310 bytes to more than the Original file from the iTunes Store!
I contacted the support of TunesKit who kindly replied as follows:
Thanks very much for your feedback.
I just asked our developers for more details regarding to your problem. And they said it was normal,
because we use different methods to encode the metadata info of the converted iTunes videos. It makes the file size larger than the original one's.
In addition, most people buy TunesKit to enable the iTunes movies playable on different devices or media players, but M4V format is not compatible with most devices.
That's why we change the file extension to MP4. But you can see the resolution and bit rate is the same as the original movies.
As I am curious I wanted to make a new test. For that, I exclude the DRM-free version that had just created on TunesKit and again put the TunesKit to remove the DRM from the same movie! Obviously I used the same Original file from iTunes Store! Was to be expected, given the response of support TunesKit the final file (DRM free) possessed EXACTLY the same amount of bits of another file previously generated! But to my surprise it didn't happen!
See the image below that the second file generated DRM free (of the same movie) has a different amount of bytes of the previously generated!!!!
Think with me!
If the reason for the final file generated by TunesKit be different from the original file is because the TunesKit move in the metadata of the file, the same movie should have the same metadata changes and thereby generate an output file EXACTLY the same size as how many times it was run! This happens with the Requiem 4.1 which preserve EXACTLY the amount of bits of the Original file it always generates a final file containing the same amount of bits.
This fact assures me beyond a shadow of a doubt that the Requiem 4.1 makes only a DRM removal without any video conversion! However, I can't reach that same conclusion logic using the TunesKit 2.1.8
For my happiness, a little while ago I received another email from TunesKit support who told me:
I'm so sorry for the trouble caused to you.
Please no worry, I will forward your requirement to our developers soon. It may not be fixed in next version, because the next version is in schedule already. However, we will add this feature in future version.
Finally, we need more information about what exactly are these metadata changes produced and because a second conversion generates a file with different size! Metadata changes should be the same and therefore the final size should be the same as the TunesKit claims not to do video conversion, i.e., be free of losses (Lossless).
These are my perceptions about the application. He is a very good application but need to improve on the points already mentioned. Honestly I hope soon the TunesKit becomes the real successor to the late Requiem 4.1