[debbugs-tracker] bug#34797: closed (ffmpeg: error while loading shared libraries: (...): file too short)

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Your message dated Sun, 10 Mar 2019 21:36:33 +0800
with message-id <address@hidden>
and subject line Re: ffmpeg: error while loading shared libraries: (...): file 
too short
has caused the debbugs.gnu.org bug report #34797,
regarding ffmpeg: error while loading shared libraries: (...): file too short
to be marked as done.

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34797: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=34797
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--- Begin Message --- Subject: ffmpeg: error while loading shared libraries: (...): file too short Date: Sun, 10 Mar 2019 04:10:15 +0800 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

Hello guix,

Does anyone has the same problem with ffmpeg from latest master? I've
got the following error:

========================================================================
address@hidden:~$ ffmpeg --help
ffmpeg: error while loading shared libraries: 
/gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1/lib/libavdevice.so.58: 
file too short
========================================================================

The following command shows that most of the shared libraries built are
empty:

========================================================================
address@hidden:~$ LC_ALL=C find "$(guix build ffmpeg)/lib" -type f -execdir ls 
-hl '{}' ';'
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libavformat.so.58.20.100
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libavutil.so.56.22.100
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libavfilter.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libavutil.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libavresample.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libpostproc.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libswresample.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libavcodec.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libavformat.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libswscale.pc
-r--r--r-- 6785 root root 0 Jan  1  1970 ./libavdevice.pc
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libavdevice.so.58.5.100
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libavfilter.so.7.40.101
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libavresample.so.4.0.0
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libswresample.so.3.3.100
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libpostproc.so.55.3.100
-r-xr-xr-x 26 root root 0 Jan  1  1970 ./libswscale.so.5.3.100
-r-xr-xr-x 2 root root 14M Jan  1  1970 ./libavcodec.so.58.35.100
========================================================================

I'm CC'ing guix-devel since ffmpeg is essential to many audio/video
packages (e.g. mpv, vlc).

Cheers,
Alex

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--- Begin Message --- Subject: Re: ffmpeg: error while loading shared libraries: (...): file too short Date: Sun, 10 Mar 2019 21:36:33 +0800 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

Hello Tobias,

Tobias Geerinckx-Rice <address@hidden>
writes:

> Alex,
>
> Something is amiss on your box.
>
> Alex Vong wrote:
>> Does anyone has the same problem with ffmpeg from latest master? 
>> I've
>> got the following error:
>>
>> ========================================================================
>> address@hidden:~$ ffmpeg --help
>> ffmpeg: error while loading shared libraries: 
>> /gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1/lib/libavdevice.so.58:
>> file too short
>> ========================================================================
>
> λ file -L 
> /gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1/lib/libavdevice.so.58
> /gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1/lib/libavdevice.so.58:
>  
> ELF 64-bit LSB pie executable x86-64, version 1 (SYSV), 
> dynamically linked, stripped
>
> λ ls -lh 
> /gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1/lib/libavdevice.so.58.5.100
>  
> -r-xr-xr-x 2 root root 152K Jan  1  1970 
>  
> /gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1/lib/libavdevice.so.58.5.100
>
> Have you fsck'd your file system lately?
>
> T G-R

Thanks for the suggestion! I think I did. Running

  sudo guix gc --verify=contents,repair

shows that glibc, perl and ffmpeg are corrupted.

However, the repair doesn't fix the
"/gnu/store/4hcr7ygdhaxws6q5dj806cbvq0dkfgkw-ffmpeg-4.1.1" item.
I guess this's because it is built using grafting.
Anyway, I roll back, delete the latest generation, build ffmpeg and it
works again!

Thanks,
Alex

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