I am trying to write a simple bash script that executes the command tcprobe -i $1 where $1 is an mp4 file. Then, I want to write the output of this command, which should be a long string of information about the video file, to a file called frameInfo.
My code currently is:
#/bin/bash
echo (tcprobe -i $1) > frameInfo
However, this writes the output of tcprobe to the file.
You don't need your echo nor parenthesis here. Checking $1 was defined could be relevant as well:
#!/bin/sh
if test "$#" -eq 0; then
echo missing argument
exit 1
fi >&2
if test "$DEBUG"; then
set -x
tcprobe -i "$1"
echo returned $?
set +x
else
tcprobe -i "$1" >frameInfo 2>&1
fi
exit 0
use DEBUG=toto ./your/script yourFileArgument, to enable debugs.
echo fails, that fails to exit the script. It's better to use proper if/then constructs here than to chain &&d commands.
>frameInfo, insert a #) to confirm the command is properly running. Isn't there an error message at least?