why copying big file fails?

From	a <loushanguan2015@sina.com>
Newsgroups	linux.debian.user
Subject	why copying big file fails?
Date	2022-01-30 21:20 +0100
Message-ID	<DLoQ1-33L-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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i create video mp4 with android's screen-recorder, it's about 4G

i connect it to debian with jmtpfs and copy it to ext4 hard disk with 
more than 10G  of free space

it fails: cp: error reading 
'DCIM/ScreenRecorder/Screenrecorder-2022-01-30-12-29-58-111.mp4': 
Invalid argument

i run "ls -l", about 2G has been copied

i've play this mp4 using android, didn't meet reading error

BTW which package in bullseye can play mp4? mplayer has failed, and some 
player require gnome , but i haven't installed gnome

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why copying big file fails? a <loushanguan2015@sina.com> - 2022-01-30 21:20 +0100
  Re: why copying big file fails? "Andrew M.A. Cater" <amacater@einval.com> - 2022-01-30 21:20 +0100
    Re: why copying big file fails? a <loushanguan2015@sina.com> - 2022-01-30 21:40 +0100
      Re: why copying big file fails? "Andrew M.A. Cater" <amacater@einval.com> - 2022-01-30 22:00 +0100
      Re: why copying big file fails? "Thomas Schmitt" <scdbackup@gmx.net> - 2022-01-30 23:00 +0100
  Re: why copying big file fails? ghe2001 <ghe2001@protonmail.com> - 2022-01-30 21:30 +0100
    Re: why copying big file fails? a <loushanguan2015@sina.com> - 2022-01-31 00:00 +0100
  Re: why copying big file fails? Reco <recoverym4n@enotuniq.net> - 2022-01-30 22:10 +0100
    Re: why copying big file fails? Hans <hans.ullrich@loop.de> - 2022-01-30 22:30 +0100
      Re: why copying big file fails? Reco <recoverym4n@enotuniq.net> - 2022-01-31 07:20 +0100
    Re: why copying big file fails? Michael Stone <mstone@debian.org> - 2022-01-31 16:20 +0100
      Re: why copying big file fails? lou <loushanguan2015@sina.com> - 2022-01-31 22:20 +0100

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