resizing mp4 videos and generate poster .jpg with ffmpg

gistfile1.txt

## rezize videos (change resolution here 854x480)
for i in $(ls p*); do ffmpeg -i $i -vf scale=854:480 $(echo $i | cut -d. -f1)_480p.mp4; done 


## generate posters (only from resized files)
for i in $(ls *_480*); do echo ffmpeg -i $i -ss 00:00:14.435 -vframes 1 $(echo $i | cut -d. -f1).jpg; done 
 
 
 
 
 
 
 
 ### ffmpeg timelapse script
 #!/bin/bash
set -x
if [ $# -ne 3 ]; then
    echo "Usage:"
    echo -e "\t${0} <pics> <audio> <out>"
    echo
    echo "Example:"
    echo -e "\t${0} DSC_%d.jpg track.flac timelapse.mp4"
    echo -e "%d must start with 1 (DSC_0001.jpg)"
    exit 0
fi

#START=$1
PICS=$1
AUDIO=$2
OUT=$3

ffmpeg -i "$PICS" -i "$AUDIO" -map 0:0 -map 1:0 -r 30 -s hd1080 -vcodec libx264 -shortest "$OUT"