Legacy ImageMagick Discussions Archive

Hello,

'identify -format %m' deletes file if it's empty and have .mp4 extension

➜ ~ identify -format %m, /Users/kgorin/identify_test.mp4
identify: delegate failed `"ffmpeg" -v -1 -i "%i" -vframes %S -vcodec pam -an -f rawvideo -y "%u.pam" 2> "%Z"' @ error/delegate.c/InvokeDelegate/1314.
identify: unable to open image `/var/tmp/magick-7964QEfqjIQPe8um.pam': No such file or directory @ error/blob.c/OpenBlob/2701.

And after that file gets deleted from a disk. Is that a bug?

OS X 10.10, installed with homebrew
➜ ~ identify
Version: ImageMagick 6.9.0-3 Q16 x86_64 2015-01-09 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC
Features: DPC Modules
Delegates (built-in): bzlib freetype jng jpeg ltdl lzma png xml zlib

You need to install the ffmpeg delegate library for IM to detect the magic value for an mpeg video or to process (read/write) one.

Your list of delegates does not include that.

Delegates (built-in): bzlib freetype jng jpeg ltdl lzma png xml zlib

You also do not have delegates for tiff or ghostscript (ps and pdf formats)

I am on a Mac and do the following using MacPorts. See viewtopic.php?f=1&t=21502&p=88202&hilit ... rts#p88202

My delegates are the following, though you don't need them all.

I get why it can't identify the file, but deleting the file is definitely not expected behaviour, isn't it?

No, I would not expect that it would delete your file.

identify -format %m, /Users/kgorin/identify_test.mp4

This is not correct syntax. There should be no comma. Try
Does that work without deleting the file?

We can reproduce the problem you posted and have a patch in ImageMagick 6.9.0-8 Beta available by sometime tomorrow. Thanks.

fmw42 wrote:No, I would not expect that it would delete your file.

identify -format %m, /Users/kgorin/identify_test.mp4

This is not correct syntax. There should be no comma. Try

That's a typo, works the same.

magick wrote:We can reproduce the problem you posted and have a patch in ImageMagick 6.9.0-8 Beta available by sometime tomorrow. Thanks.

Thanks!