$ ffprobe ./pfetch.mp4 -hide_banner -show_entries format 2>/dev/null
[FORMAT]
filename=./pfetch.mp4
nb_streams=1
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=24.240000
size=223463
bit_rate=73750
probe_score=100
TAG:major_brand=isom
TAG:minor_version=512
TAG:compatible_brands=isomiso2avc1mp41
TAG:encoder=Lavf58.20.100
[/FORMAT]

指定情報のみ取得(ここでは duration 動画時間)

$ ffprobe ./pfetch.mp4 -hide_banner -show_entries format=duration 2>/dev/null
[FORMAT]
duration=24.240000
[/FORMAT]

$ ls -1 ./file*.mp4 | xargs -I{} ffprobe {} -hide_banner -show_entries format 2>/dev/null | grep duration | cut -f2 -d= | xargs -I{} echo {}/60|bc
230
120