YAD and Zenity - Input Start/Stop Times to Trim Video

Question

I have a bash script and a php script that function in concert to trim audio/video files using start/stop times.

PHP script:

<?php
// Create datetime objcects
$dt1 = new DateTime($argv[1]);
$dt2 = new DateTime($argv[2]);

// Conver difference to seconds
$dt3 = $dt2->format('U') - $dt1->format('U');

// echo $dt3."\n";
$h = (int)($dt3 / 3600);
$dt3 %= 3600;
$m = (int)($dt3 / 60);
$dt3 %= 60;
$s = $dt3;

// Dump as H:M:S
echo $h . ":" . $m . ":" . $s;

?>

chopvideoaudio.sh script:

#!/bin/bash
INFILE=$1
START=$2
STOP=$3
OUTFILE=$4

OFFSET=`php TimeDiff.php "$START" "$STOP"`

echo "Disecting $INFILE starting from $START to $STOP (duration $OFFSET)"
ffmpeg -ss "$START" -t "$OFFSET" -i "$INFILE" "$OUTFILE"

Usage:

./chopvideoaudio.sh [input.mp4] [startchop] [stopchop] [output.mp4]

Where [startchop] and [stopchop] are both absolute timestamps from the beginning of the track.

Example command to run this script:

./chopvideoaudio.sh input.mp4 00:01:20 00:01:45 output.mp4

I want a YAD (yet another dialog) script that will open up a dialog box(es) containing an input field to enter a custom file type (e.g. mp3, mp4, avi). Then input fields for the two timestamps, in which I can enter two custom timestamps. After pressing OK the script will run and extract the section from between the two timestamps.

I would also be interested in a solution using Zenity, but I prefer YAD.

Answer 1

Here is a solution using yad, bash only (no php), with one dialog:

#!/bin/bash
 
eval $(yad --width=400 --form --field=input:FL --field=start --field=end --field=output:SFL "" "00:00:00" "00:00:00" "" | awk -F'|' '{printf "INPUT=\"%s\"\nSTART=%s\nEND=%s\nOUTPUT=\"%s\"\n", $1, $2, $3, $4}')
[[ -z $INPUT || -z $START || -z $END || -z $OUTPUT ]] && exit 1

DIFF=$(($(date +%s --date="$END")-$(date +%s --date="$START")))
OFFSET=""$(($DIFF / 3600)):$(($DIFF / 60 % 60)):$(($DIFF % 60))
 
ffmpeg -ss "$START" -t "$OFFSET" -i "$INPUT" "$OUTPUT"

Here is a screenshot of what it will look like. Please note that the text of the buttons will be automatically adapted to your choosen language. I'm French speaker obviously!

The drawback of this one dialog only is that with yad, you cannot pre-select file extension for file input. If this is mandatory, here is two steps/dialogs solution:

#!/bin/bash
 
INPUT=$(yad --width=600 --height=400 --file-selection --file-filter='*.mp3 *.mp4 *.avi')

eval $(yad --width=400 --form --field=start --field=end --field=output:SFL "00:00:00" "00:00:00" "${INPUT/%.*}-out.${INPUT##*.}" | awk -F'|' '{printf "START=%s\nEND=%s\nOUTPUT=\"%s\"\n", $1, $2, $3}')
[[ -z $START || -z $END || -z $OUTPUT ]] && exit 1

DIFF=$(($(date +%s --date="$END")-$(date +%s --date="$START")))
OFFSET=""$(($DIFF / 3600)):$(($DIFF / 60 % 60)):$(($DIFF % 60))
 
ffmpeg -ss "$START" -t "$OFFSET" -i "$INPUT" "$OUTPUT"

That shows a file picker and then a timestamp window like this:

Answer 2

You can Use Zenity as follows:-

1. For File-selection:

   file=$(zenity --file-selection --file-filter='*.mp4 *.mp3 *.avi')
   

   or

   file=$(zenity --file-selection --title="Select Input File" --file-filter='*.mp4' --file-filter='*.mp3' --file-filter=*.avi)
   

2. For Text-Entry:

   startchop=$(zenity --entry --text=startchop)
   stopchop=$(zenity --entry --text=stopchop)
   

   or Zenity-Forms:-

   zenity --forms --text="Time-stamps" --add-entry=startchop --add-entry=stopchop
   

---

Now: echo $file $startchop $stopchop gives you output like: input.mp4 00:01:20 00:01:45

i.e you can use variables $file, $startchop and $stopchop. Customize the command as you wish!

---

EDIT:-

Suggested chopvideoaudio.sh script:

#!/bin/bash
INFILE=$(zenity --title="Select Input File" --file-selection --file-filter='*.mp4' --file-filter='*.mp3' --file-filter=*.avi)
$TIMESTAMPS=$(zenity --forms --text="Time-stamps" --add-entry=startchop --add-entry=stopchop)
START=$(echo $TIMESTAMPS | cut -d '|' -f 1)
STOP=$(echo $TIMESTAMPS | cut -d '|' -f 2)
OUTFILENAME=$(zenity --entry --text=filename)
OUTFILETYPE=$(zenity --list --titile="Select File Type" --text="file types\ selection" --column="Select" --column="File Type" --radiolist false avi true mp4 false mp3)
OUTFILE="$OUTFILENAME".$OUTFILETYPE

OFFSET=`php TimeDiff.php "$START" "$STOP"`

echo "Disecting $INFILE starting from $START to $STOP (duration $OFFSET)"
ffmpeg -ss "$START" -t "$OFFSET" -i "$INFILE" "$OUTFILE"

Usage: only run ./chopvideoaudio.sh

Explanation:-

• INFILE=$(zenity --title="Select Input File" --file-selection --file-filter='*.mp4' --file-filter='*.mp3' --file-filter=*.avi) will display GUI File selection window by Zenity:

  

• $TIMESTAMPS=$(zenity --forms --text="Time-stamps" --add-entry=startchop --add-entry=stopchop) will display GUI Tex entry box in which you have to enter timestamps:

  

  And from above $START and $STOP get both values respectively.

• OUTFILE="$OUTFILENAME".$OUTFILETYPE is the combination of (A text entry for output file-name) OUTFILENAME=$(zenity --entry --text=filename)

  And The GUI file-type selection dialogue by OUTFILETYPE=$(zenity --list --title="Select File Type" --text="file type selection" --column="Select" --column="File Type" --radiolist false avi true mp4 false mp3):

  

Hence By means of this example:-

• $INFILE returns selected file for input (e.g input.mp4)
• $START & $STOP returns 00:01:20 and 00:01:45 respectively.
• $OUTFILE returns output file-name with file-type (e.g output.mp4)