Tech info related to digital image, audio, & video manipulation, metadata, etc.
$ ffmpeg -i <video_file> -vf cropdetect,metadata=mode=print -f null -
$ ffmpeg -i <video_file> -vf crop=w=1440:h=1080:x=240:y=0
$ ffplay -vf eq=gamma=1.3:saturation=1.1 <video_file>
$ ffmpeg -i <video_file> eq=gamma=1.3:saturation=1.1 -c:a copy <output_file>
$ ffmpeg -i <INPUT_FILE> -aspect 16:9 -c copy [OUTPUT_FILE]
$ ffmpeg -i file1.m4a -acodec copy file1.aac
$ ffmpeg -i file2.m4a -acodec copy file2.aac
$ cat file1.aac file2.aac >> filenew.aac
$ ffmpeg -i filenew.aac -acodec copy -bsf:a aac_adtstoasc filenew.m4a