Any way to combine two files?

Assuming the downloads are entirely legal:

Open each file in TextEdit, making sure it's in 'Plain Text' mode (if it isn't in Plain Text mode, you'll get a toolbar along the top with centre justify, lists etc...).

Then copy the contents of the file (Command + A and Command + C) you moved into a new text file (may take a while, loads of stuff to process). Then open the '2nd' part of the downloaded file, and add this to the end of the new file you created. Save the file as anything, as long as it has the right extension, (such as .AVI), and it *should* work perfectly.

 

2 things you can try. Download Perian, and install it. Then try to play both files in Quicktime. If they both play, here is what you do.

You have Movie1 (the first part) and Movie2 (the second part), open them bith in Quicktime, but don't play them.

Move the progress bar on Movie1 all the way to end, but don't press play since that will jump it back to the beginning.

On Movie2, if you move your cursor just below the progress bar you will see two little bookend looking things. Move the right one all the way to the far right end of the progress bar, notice how it changed to a darker color?

Now, click and hold on the actual viewing area, and drag it to the viewing area of Movie1. This should combine the two files. Now just do a save as, and you should be done.

*It is entirely possible that this is only possible with Quicktime Pro.

 

Torrents do not download as contiguous files. You may have bits of the beginning, end, and various part of the middle. You interrupted that process. There is probably no way to undo it.