Broken ffmpeg delegate in AppImage

[NuckChorris]

ImageMagick version

AppImage (7.1.1-19)

Operating system

Linux

Operating system, version and so on

Ubuntu 22.04.3 LTS

Description

FFmpeg is not included in the AppImage. When I install FFmpeg in the host system, there are issues with gobject which don't appear when calling ffmpeg normally (though I don't know precisely what call is being made to ffmpeg, and setting MAGICK_DEBUG=all does not appear to log that)

Perhaps of note, I have /lib/x86_64-linux-gnu/libgobject-2.0.so.0 installed, and it does contain the symbol mentioned:

$ nm -gD /lib/x86_64-linux-gnu/libgobject-2.0.so.0 | grep uri
00000000000187e0 T g_uri_get_type
                 U g_uri_ref
                 U g_uri_unref

Steps to Reproduce

1. Start with a fresh Ubuntu system (I have tried both 22.04 LTS and Ubuntu 23.10)
2. Copy the sample APNG file to animated.png
3. curl -O https://imagemagick.org/archive/binaries/magick
4. chmod +x ./magick
5. ./magick identify apng:animated.png
   • sh: 1: ffmpeg: not found
6. apt install ffmpeg
7. ./magick identify apng:animated.png
   • ffmpeg: symbol lookup error: /lib/x86_64-linux-gnu/libgobject-2.0.so.0: undefined symbol: g_uri_ref

Images

[urban-warrior]

That looks like an issue with the ffmpeg install. Type ffmpeg on the comamnd-line. Do you get the same exception? If so, the issue is exclusive to ffmpeg, not ImageMagick.

[wups]

I encountered the same problem on Kubuntu 23.10 using the ImageMagick AppImage.
My installed ffmpeg version is 6.0-6ubuntu1.
@urban-warrior ffmpeg is able to process the video file if used on its own.

[urban-warrior]

That suggests an issue with the APPImage environment since all it does is call the ffmpeg utility from the command line. Try

export LD_PRELOAD=/lib/x86_64-linux-gnu/libgobject-2.0.so.0
./magick identify apng:animated.png

If that fails, unfortunately we cannot help further.

[NuckChorris]

Setting LD_PRELOAD just adds two more errors without fixing the g_uri_ref issue:

$ export LD_PRELOAD=/lib/x86_64-linux-gnu/libgobject-2.0.so.0
$ ./magick identify apng:6.png
basename: symbol lookup error: /lib/x86_64-linux-gnu/libgobject-2.0.so.0: undefined symbol: g_uri_ref
/tmp/.mount_magickU9H0yN/AppRun: line 25: /tmp/.mount_magickU9H0yN/usr/bin/: Is a directory
/tmp/.mount_magickU9H0yN/AppRun: line 25: exec: /tmp/.mount_magickU9H0yN/usr/bin/: cannot execute: Is a directory

Is it possible to see the exact command that ImageMagick is calling ffmpeg with, so I can try to reproduce and make a test case to send upstream to ffmpeg (or more likely, Ubuntu's packagers)?

Edit: actually it changed the error message for g_uri_ref which is now listed as coming from basename 🤔

[urban-warrior]

Try this command:

magick convert -verbose apng:6.png null:

[NuckChorris]

Thanks, that gives me the command! Definitely looks like an AppImage issue, the same command works perfectly outside of it:

$ ./magick convert -verbose apng:6.png null:
'ffmpeg' -nostdin -loglevel error -i '/tmp/magick-36xwVmHSL4qRZxVpOJuUnzCJjVkTOmu3' -an -f rawvideo -y  -pix_fmt rgba -vcodec webp -lossless 1 '/tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0'
ffmpeg: symbol lookup error: /lib/x86_64-linux-gnu/libgobject-2.0.so.0: undefined symbol: g_uri_ref
convert: no images defined `null:' @ error/convert.c/ConvertImageCommand/3359.
$ file /tmp/magick-36xwVmHSL4qRZxVpOJuUnzCJjVkTOmu3
/tmp/magick-36xwVmHSL4qRZxVpOJuUnzCJjVkTOmu3: symbolic link to /root/6.png
$ file /tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0
/tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0: cannot open `/tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0' (No such file or directory)
$ 'ffmpeg' -nostdin -loglevel error -i '/tmp/magick-36xwVmHSL4qRZxVpOJuUnzCJjVkTOmu3' -an -f rawvideo -y  -pix_fmt rgba -vcodec webp -lossless 1 '/tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0'
$ file /tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0
/tmp/magick-rZNHb2geLUvvprDv_PvgKs3SV_ZKQfT0: RIFF (little-endian) data, Web/P image