ffmpeg tools

cropdetect.sh

#!/bin/bash

# [Parsed_cropdetect_0 @ 0x220cdc0] x1:0 x2:1279 y1:0 y2:719 w:1280 h:720 x:0 y:0 pts:215 t:0.215000 crop=1280:720:0:0
# [Parsed_cropdetect_0 @ 0x220cdc0] x1:0 x2:1279 y1:0 y2:719 w:1280 h:720 x:0 y:0 pts:257 t:0.257000 crop=1280:720:0:0
# [Parsed_cropdetect_0 @ 0x220cdc0] x1:0 x2:1279 y1:0 y2:719 w:1280 h:720 x:0 y:0 pts:299 t:0.299000 crop=1280:720:0:0

ffmpeg -ss 90 -i $1 -vframes 10 -vf cropdetect -f null -

croppreview.sh

#!/bin/bash

# ffplay -vf crop=1280:720:0:0 input.mp4
# $1=file $2=crop

ffplay -vf crop=$2 $1

cropvideo.sh

#!/bin/bash

# ffmpeg -i input.mp4 -vf crop=1280:720:0:0 -c:a copy output.mp4
# $1=file $2=crop $3=output

threads=$(nproc --all | awk '{ print $1-1 }')
if [ $threads -eq 0 ]; then
  threads=1;
fi

case "$2" in
"auto")
    position=$(ffprobe -show_streams $1 2> /dev/null | grep nb_frames | head -1 | cut -d \= -f 2 | awk '{print $1-1+1}')

    if [ $position -ne 0 ]; then
      position=$($position / 2);
    fi

    crop=$(ffmpeg -threads $threads -i $1 -vf select=$position -t 1 -vf cropdetect -f null - 2>&1 | awk '/crop/ { print $NF }' | cut -d \= -f 2 | tail -1)
;;
*)
    crop=$2
;;
esac

file=$(basename "$1")
ext=${file##*.}
fileName=$(basename "$file" ".$ext")_crop

output=${3:-$fileName".mp4"}
rm -f "$output"

ffmpeg -threads $threads -i $1 -vf crop=$crop -c:a copy $output

frameexport.sh

#!/bin/bash

# ffmpeg -i input.mp4 -vf select=\'eq\(n,1337\) -vframes 1 output.jpg
# $1=file $2=position $3=output

threads=$(nproc --all | awk '{ print $1-1 }')
if [ $threads -eq 0 ]; then
  threads=1;
fi

case "$2" in
"first")
    position=0
;;
"last")
    position=$(ffprobe -show_streams $1 2> /dev/null | grep nb_frames | head -1 | cut -d \= -f 2 | awk '{print $1-1}')
;;
*)
    position=$2
;;
esac

file=$(basename "$1")
ext=${file##*.}
fileName=$(basename "$file" ".$ext")_$position

output=${3:-$fileName".jpg"}
rm -f "$output"

ffmpeg -threads $threads -i $1 -vf select=\'eq\(n,$position\) -vframes 1 $output

video-convert.sh

#!/bin/bash

threads=$(nproc --all | awk '{ print $1-1 }')
if [ $threads -eq 0 ]; then
  threads=1;
fi

file=$(basename "$1")
ext=${file##*.}
fileName=$(basename "$file" ".$ext")

ffmpeg -threads $threads -i "$1" -c:v h264 -an ${2:-$fileName}.mp4
ffmpeg -threads $threads -i "$1" -c:v libtheora -q:v 4 -an ${2:-$fileName}.ogv
ffmpeg -threads $threads -i "$1" -c:v libvpx-vp9 -b:v 5M -an ${2:-$fileName}.webm