Question

I made a simple bash script to convert movies from .avi to .mp4 but now I want to do two more things.

1. Have the output file have only *.mp4 rather than *.avi.mp4
2. Delete the old file after the conversion is completed.

Here is my script.

#!/bin/bash


avconv -i "$1" -c:v libx264 -c:a copy -sn -crf 24 "$1".mp4

Answer 1

1. You should do ${1%.avi}.mp4, where we tell bash to print the contents of $1 with the .avi suffix removed, and then append the .mp4 suffix.
2. I would suggest running aconv ... && rm "$1", in order to only delete if conversion succeeds, because the && operator only executes the command that follows it if the previous command succeeds.

Final version:

#!/bin/bash

avconv -i "$1" -c:v libx264 -c:a copy -sn -crf 24 "${1%.avi}.mp4" && rm "$1"

Hope this helps =)