Legacy ImageMagick Discussions Archive

glennrp,

I found a solution - if the delay was not included when creating the MNG, then this will extract the PNGs:

mplayer -ss 00:00:00 -frames 4 -vo png t.mng

- the PNG files produced are large but shrink when processed into a MNG again (with the delay switch this time).

Regards,

Phil.

glennrp,

No . . I still just get one image . .

I did try pngsplit ("pngcheck -x") but it produces no output . .

Thanks,

Phil.

glennrp,

I was wondering if that was the case . . so is there any way of extracting the individual PNGs somehow?

Thanks,

Phil.

People,

To qualify my own question - this problem only occurs on MNG files that were created WITHOUT the "delay" switch switch eg:

convert *png t.mng

instead of:

convert -delay 100 *png t.mng

Thanks,

Phil.

glennrp,

Thanks for that! Is there some way to now tell "display" to:

- pause
- allow stepping through the frames with a key press
- automatically resize the image to screen height

?

Thanks again,

Phil.

People,

I have been happily using a script for some time now that converts scanned, single PNGs into an MNG file and viewing this with either "display" or "mplayer" but now I need to be able to convert some MNGs back into their individual PNG files but this:

convert test.mng t_%d.png

only ...

People,

This seems to be an old problem? - I am using Fedora ImageMagick-6.7.0.10-4.fc16.x86_64 .

I created two and three page docs with eg:

convert t1.png t2.png t3.png t.mng

Using "display" to look at the file, shows the last page but pressing BS to look at previous pages crashes the program ...