Neither of these workarounds are ideal...is there any other way do a fix for this on the iFlicks side? Reencoding the files takes a much longer time than the iTunes compatible preference muxing... also I'd like to use iTunes compatible for .mkvs (which convert fine). If there's no workaround would it be possible to recognize that to end up in iTunes, some files (for me, xvid .avi files) need to be encoded to be 'iTunes compatible" and others (h.264 mkvs) do not need to be reencoded?

This isn't a solution at all, this takes well over an hour per file, which is going to take my library 41 days to complete if its left on non stop, and runs into no problems that result in crashing, which this application does a lot for some reason. I wouldn't really call this a lion compatible application yet if it can't be used how it is intended. And putting it in 32-bit mode will not work with apple TV for the files in question. Like the above poster ^. The only files that work for me are MKV.

Hey guys. I'm pretty sure you may have the wrong idea about this feature. If the file is a .mkv and it worked its most likely because that original "container" was made up of both a h.264 video file and a AC3 audio file. This means that iFlicks strips these from the .mkv container and dumps them into the m4v container (little harder then it sounds but still true). If the file is a AVI its extremely unlikely although possible it will contain a h.264 video stream inside it. This leaves you with two options, transcode the video to h.264 or if you really want mpeg 2 (this takes a long time and depend on your machines CPU) or movie the current video and audio stream into a .mov container (iTunes compatible) and trick iTunes into playing it. Its not iFlicks fault that this is how it needs to be done. Of course if you take the second option and i don't recommend it, you will be at the mercy of 3rd party plugins working with iTunes. Even though your files will show up as .mov they are really just thinly disguised AVI files. In short this just how iTunes has always worked and you can't blame iFlicks for giving you the the freedom to choose which works best for you. Hope this helps. just my thoughts but I'm sure the creator of the app could explain better then I.

Since I've upgrade to iFlick 1.4.2  I have an error with mkv(h.264) files using " iTunes compatible "

If I use the iFlick 1.4.0 version I do not have the problem.

Lion : 10.7.1
iTunes 10.4.1 (tried on 32 and 64 bits) 
I've tried different mkv files and have the same error. "iTunes en mode 64 bits ne peut ajouter ce fichier video" traduction : iTunes in 64 bits mode cannot add that video file.

I've tried 

I really wish I hadn't downloaded iTunes 10.5 because ever since, the files I've converted to .m4v through iFlicks won't open in iTunes, making the whole setup for apple tv useless. I looked into making the changes suggested above but my application info box doesn't have that option. Is iFlicks planning an upgrade soon?

For me with iTunes 10.5 (64-bit) in Lion, iTunes Compatible preset works as long as the file isn't over 4gb in size.  TV Shows and Movies will both be moved to an m4v container and placed in my iTunes library.  If the file is larger than 4gb, I find iTunes won't accept it in either 32-bit or 64-bit mode and just saving it to a folder makes the file unreadable.  Maybe iFlicks has an issue with outputting larger files.

Not happy with this!! I bought this app for the sole purpose of putting my movie library in to iTunes. i then find that it has to be 32 bit. so i try to change my iTunes to 32 bit by using the method above ( get info and then click the "open in 32 bit mode") but i don't have that option! there's no box that says that so i know have a app which is useless to me! I want my money back please! This is ridiculous! 

Just bumped into the same problem. Tried to convert a 9.4 GB 1080p file but after a while the the box tuns RED and can't proceed.

To bad, coz this seemed nice. Even 1.4.3 doesnt change this. Jendrik any ideas? You posted on NOv 4 that 1.4.3 should work. Well it doesn't.

I've been having similar issues (albeit sporadically) over the past few weeks converting various files, however I've noticed that instead of converting the AVI files to iTunes Compatible, and instead converting them to Apple TV compatible, I don't get the RED BOX and failure....  and all the files are visible on Apple TV, iPad e.t.c.

I'm running iFlicks 1.4.3, and Lion 10.7.2

I know this is an old thread, but I just ran into this problem and wanted to post my solution. It was 100% my fault. Drive where the iFilcks "destination" directory was filed up and gave this exact error.

I have similar problem when trying to process following MKV file:

video: h.264 MPEG 4 AVC (part 10) avc1

audio 1: AC3 audio, Russian Language

audio 2: AC3 Audio, Japanese Language

subtitles: SubStation Alphe Subtitles (ssa)

I'm using Lion 10.7.3, iTunes 10.6.1 and iFlicks 1.4.4 on my old placstic macbook and new mackbook air

When iTunes in 64 bit mode, iFlicks can't process video with profile 'iTunes Compatible', saying that 64-bit iTunes can't process this file.

When iTunes in 32 bit mode, iFlicks process video normally, but I can only play it on my old Macbook (which has been upgraded from Leopard to Snow Leopard and to Lion), and can't play the file on Macbook air (which has Lion preinstalled) and also can't play it with iTunes 10.6.1 32 bit on my Windows 7 PC (sound is playing and i can switch between audio tracks, but there is blank screen instead of video).

I've got the same problem.

iFlicks has "converted" (i am using the iTunes compatible preset) all Files perfectly for a while, but it stopped working as usual right now. It says can't add the files because iTunes is running in 64-Bit mode. It converted the first 2 episodes of a tv series, but it won't convert any other episode from that season. I can play the converted m4v with Quicktime as usual but it's impossible to add it to iTunes!

I have no idea why it stopped working...

Ok, here is how I deal with the problem.

1. Use Handbrake to create the m4v file.

2. Click and drag it to your iTunes library,

3. select the item(s) in your iTunes movie library,

4. click iTunes > Services > Automatically update the metadata for selected tracks

You end up with the file, in place, with the metadata. Works fine on AppleTV2 and AppleTV3. I just tested it on a video.......

Hope this helps

That's not a solution at all.  If you're going to use Handbrake (free), then you might as well use Subler (free) to do the metadata lookups as well.  iFlicks is paid software ($19.99) and should at the least be able to perform the advertised features without all these ridiculous workarounds.  I was a big user of iFlicks up until all this happened.  I've looked around for other solutions and found that iVideo Importer Pro ($9.99) is capable of all the things that iFlicks is (encoding, remuxing, etc), and it works without putting anything into 32-bit mode, plus it's half the price.