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Convert Nero .nrg files to .iso via dd

with 7 comments

There’s a tool called nrg2iso to convert .nrg files to .iso files. You can use that. Just emerge/apt-get/make the tool and you’re done.

nrg2iso cd-image.nrg cd-image.iso

OR

You can use the `dd` command. The difference between an NRG and ISO file is basically a 300kb header that Nero adds to a simple ISO file. So we can just trim this header off and you’ll have your ISO file.

dd bs=1k if=cd-image.nrg of=cd-image.iso skip=300

That’s it.

Possibly related posts: (automatically generated)

Written by jedrm

June 27, 2007 at 12:41 pm

Posted in Unix One-Liners

Tagged with , , ,

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7 Responses

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  1. That will only work for DAO and not TAO images. Besides the dd dumped iso will have garbage attached at the end.

    Nerd

    July 24, 2007 at 10:55 pm

    Reply

  2. It wouldn’t be prudent for me to post something like this without checking. A quick md5sum of an ISO generated via dd if=/dev/hdd of=cd.iso and a dd-trimmed nrg file of the same disc came up with the same hash sum. Identical. Now what were you saying about garbage attached at the end?

    jedrm

    July 30, 2007 at 3:19 pm

    Reply

  3. comments not workin ? oO

    nygga

    September 7, 2007 at 5:48 am

    Reply

  4. wtf? cant paste my comment oO to long ?…

    Nero format got header at the begenning and the end of file…
    The end looks like this for ex. [cant paste cause my comment is not showing -.-)
    and it looks like CUE sheet, plus is is about 1kb size...
    I think Nerd was talkin about this garbage data.

    To get for ex. 'ISO' in mode 2 you must cut *.nrg from both sides.
    Correct me if I am wrong cause I am not 100% sure ; ]

    nygga

    September 7, 2007 at 5:53 am

    Reply

  5. Yep checked it, Nero got useless 150 sectors at the begenning.
    Looks like 2 sec gap before first track. (ISOs dont include that first gap)
    so for…
    Mode1 -> 150 x 2048(Mode1) == 307200 B == 300 kB nero ‘header’
    Mode2 -> 150 x 2352(Mode2) == 352800 B == ~345 kB nero ‘header’

    Nero header at the end has various size, it deppends on CD structure.
    ex. number of tracks, if it mixed with audio tracks, ect… (not 100% sure)
    (and Maybe this is only for Mode2)

    dkkaczy

    September 7, 2007 at 6:19 am

    Reply

  6. Thanks for the tip! Works perfectly fine for me (was able to open the created ISO file with magic iso and alcohol 120% in windows)

    Ben

    January 21, 2008 at 10:45 pm

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  7. I used nrg2iso. v1.1 (latest) and it won’t covert. It causes a system crash instead

    chirayu

    January 31, 2008 at 3:13 am

    Reply

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