ISO Edit without recompile

[pacaveli211]

does anyone know a program that can achieve this? I know there's a plethora of ISO editors out there but I can't seem to find one that will allow editing without recompiling the file. To further elaborate on this: previously on WINXP I used an old version of MagicISO. With it I could replace IFO files within an ISO and save the ISO without it rewriting the whole file. Unfortunately this doesn't work on win7. Everything else seems to want to rewrite the whole file, which takes ~3-4 minutes or something. A lot slower than the 3seconds I was previously able to do it in with MagicISO. Any of the newer versions seem incapable of this. Anyone know of anything??

[The Scientist]

UltraISO allows you to do this. Just go into the configuration and select the correct option, don't have it installed at the moment so can't exactly remember what you have to tick, maybe something like: "recompile directly" or something like that.

Best of luck.

[pacaveli211]

yeah, I actually have ultraISO installed now. the option you're thinkin of is 'recompile image when saving directly'. so if turned on it obviously does what I don't want but if disable I always get the following error:

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Error
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Address conflicted where saving directly! Please use Save As.
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OK
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I didn't pay much attention to this error and just assumed it meant the app sucked and couldn't do what I wanted, but further checking into it, it seems it may be an app issue that they've fixed.
so I'll have to get the newest build and see
thanks for your reply Scientist

[r0lZ]

Note that what you want might not be possible if the size of the new IFO is greater than the original one, as it cannot fit in its original place, without having to shift all subsequent files (which means that is is necessary to recreate the ISO.)

Also, you should be extremely cautious when replacing IFO files in the ISO. PgcEdit, for example, recompute the so called "VTS sectors" included in each IFO and BUP files according to the size of the IFO and VOB files, and to the "32K gap" option. It assumes therefore that the files are contiguous, unless the 32K gap option is ON, in which case it assumes that the burning program is able to place the files correctly with the specified gap between the IFO and VOB files. But the original DVD authoring program may have layered the files on disc in a totally different manner, and therefore the VTS sectors must be different. If you simply replace an edited IFO in the ISO, the VTS sector pointers may be wrong, and your DVD will probably not work on a DVD-Video compliant standalone player.

You can probably safely use IfoEdit, as it doesn't recompute the VTS pointers (unless you explicitly request it), and it is unable to enlarge or shrink the original IFO file. But even in this case, you must be sure that the program you use to replace the file in the ISO places it at its original location. That's extremely important for DVD-Videos.

ISOs of DVD-ROMs are not so picky on this matter, and you can use your method if you wish.

[pacaveli211]

I've always used IFO edit and all I change is the first play command =) sometimes anydvd doesn't set it properly and I have to fix it. never had a problem with dvd playback from doing this

[Ghitulescu]

Why do you need the ISO image when you peform such operations? As r0lZ pointed out, any size modifications should be followed by a remapping of all pointers, otherwise you'll get into adressing problems (unplayable disc).

Unpack the ISO, do the editing, get VTS sectors if needed then burn the files as such, any DVD burner can do this.

The ISO image use is justified only in special cases, and careless editing might distroy this "special" architecture.

[netmask]

does snip
To further elaborate on this: previously on WINXP I used an old version of MagicISO. With it I could replace IFO files within an ISO and save the ISO without it rewriting the whole file. Unfortunately this doesn't work on win7. snip
Anyone know of anything??

I'm running MagicISO on Windows7 without any issues. Maybe you should try running it under Administrator?

[pacaveli211]

I'm running MagicISO on Windows7 without any issues. Maybe you should try running it under Administrator?

you're probably running one of the newer versions. they didn't seem to work nearly as well as the old one.

Ghitulescu....you can't very well test a first play without an iso or a dvd now can you. the same command does not always work for each dvd.....and as I've stated I've never had a problem with a dvd due to modifying this file