Post Processing > ffmpeg > Segmentation fault (on Raspberry Pi OS Lite (32-bit))

[TMCsw 118]

I've created a test script called /usr/bin/pp2 it contains:

#!/bin/bash -x
eval 'ffmpeg -y -hide_banner -v info -i /usb/m/Who.ts -c copy /usb/m/emby.mkv' >/usb/m/emby.1 2>/usb/m/emby.2

when run on a terminal it works fine, when called by emby via:

results in:

emby.1 & emby.mkv 0 bytes and emby.2 contains:

/usr/bin/pp2: line 2: <PID> Segmentation fault      ffmpeg -y -hide_banner -v info -i /usb/m/Who.ts -c copy /usb/m/emby.mkv

I did find that if I give the path to the emby version (/opt/emby-server/bin/ffmpeg

) it works in emby but fails in a terminal (/opt/emby-server/bin/ffmpeg: relocation error: /opt/emby-server/bin/ffmpeg: symbol avfilter_alloc version LIBAVFILTER_7 not defined in file libavfilter.so.7 with link time reference).

How can i make emby use whatever version of ffmpeg I would like it to?

TMC

 

[Luke 37008]

Hi, I think you're trying to use the server's embedded ffmpeg build. You're not going to be able to do that, well not very easily at least. 

[TMCsw 118]

Actually I'm trying NOT to use the server version, guess I should have been more clear.

ffmpeg is installed on the pi (sudo apt install ffmpeg). It runs as expected in a terminal but when called by the server in a post process bash script (ffmpeg or /usr/bin/fmpeg) it throws the Segmentation fault error.

[softworkz 3326]

33 minutes ago, TMCsimple said:

Actually I'm trying NOT to use the server version, guess I should have been more clear.

ffmpeg is installed on the pi (sudo apt install ffmpeg). It runs as expected in a terminal but when called by the server in a post process bash script (ffmpeg or /usr/bin/fmpeg) it throws the Segmentation fault error.

You need to add

unset LD_LIBRARY_PATH

to your bash script.

 

[Q-Droid 634]

And also reference ffmpeg using the full path to the executable you want to run. 

 

[softworkz 3326]

4 minutes ago, Q-Droid said:

And also reference ffmpeg using the full path to the executable you want to run. 

If he hadn't already done that, he couldn't have gotten a segfault..  

[TMCsw 118]

Thanks all the unset was what I needed. Now i can stop the Tylenol...

[Q-Droid 634]

4 hours ago, softworkz said:

If he hadn't already done that, he couldn't have gotten a segfault..  

The script is using whichever ffmpeg is found first in the search path. There is no guarantee it will be the desired one. It's better, safer, to be specific when more than one exist on the system.

[softworkz 3326]

Emby does not add its bin folder to the search path