There's a very easy answer that doesn't need all the technical stuff of modifying the bytes in the files or cutting off a few seconds here or there, or adding a few extra frames, or any other hard things.
When you collect your pictures and movies and all the other stuff you need for your torrent, put 'em all in a folder, and (to make things easy), call it the same thing as what you are going to call the torrent. Then make a torrent with the whole batch, including the preview pictures, and upload it. If you include the pictures, the torrent will be a different size than the original, especially if the pics go before the main movie, then each block of the resulting torrent will be different, and there will be no jump-on problems!
The only way the jump-on can happen is if the new torrent is IDENTICAL to the one the other person has. Adding a single pic, or a text file, something like 'Thank <user>at GT.RU for this download!" can make it different enough that a jump-on can't happen.
While you are doing this, you also help a problem some torrent clients have, with identically-named files. If you are working with more than one DVD, for example, and they have the same file names (like VIDEO.TS), if you are transferring more than one, they will "fight" over the file, unless they are in different folders, and you will end up wasting ratio on both downloads, corrupting others, getting banned, and NEVER getting done.
@blackdid:
Trukr, Uwe, MrMazda : thanks for your input Â
@beercan:
…I'm not sure but i suspect this might work to prevent "jump-in".
making minor alterations to the file you have should cause the file to acquire a different characteristic and whoever trying to perform the jump may find that their existing file lost.
theoretical and might generate some bad blood. I'd prefer if there's no need for such a measure but ... personal preference prevails.
eg.
-editing the file to change the size. (adding/cutting a 5 second intro or credit)
-change the encoding.
-[contributor input]
Beercan, this is exactly what I was experimenting !
1) 1st try : alter the last byte of an .avi file (with an hexadecimal editor able to re-write part of files…or even sectors on your hard drive, that's a dangerous program !)
As far as a long-term solution, perhaps ratio should be capped at 5 or something like that, to get around those who have extreme speeds and want to seed forever.
I've also seen cases where there were only two completed copies, and there are now no seeders – heck, I have three of them attached to my profile right now, and the other two I'm waiting on have only 1 seeder each. I really wish someone would jump on some of those sometime this month.
Here's a great example:Â 22 thanks, 5 completed!
http://tracker.gaytorrent.ru/details.php?id=30261
Here's another: 5 thanks, 2 completed!
http://tracker.gaytorrent.ru/details.php?id=64311
I've seen others where the original seeder vanished before even finishing the first copy, and I can't tell you how much ratio I've wasted on those, mainly because the stats don't show it! It's too bad there isn't a "I Give UP!" button that I could click on, to get the ratio back for things that will never complete!</user>