The VideoLAN Forums

Posted: **11 Dec 2019 11:40**

When i try :

cat video.mkv | vlc -

In GIU I get below error:

VLC can't recognize the input's format
The format of 'fd://0' cannot be detected. Have a look at the log for details

and In command line i get below errors:

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mkv demux error: cannot find any cluster, damaged file ?
ps demux error: cannot peek
mpgv demux error: cannot peek
mjpeg demux error: cannot peek
ps demux error: cannot peek
core input error: no suitable demux module for 'fd/any://0'

But when i try:

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vlc video.mkv

Vlc plays video correctly.

does any one know what should I do to pass a video through pipe?

another way that i tried to pipe a video to vlc is:

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mkfifo test
cat video.mkv > test
vlc test

doesn't work again and give me below error:

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cannot pre fill buffer

Posted: **11 Dec 2019 18:24**

Your file might not be suitable for nonseekable playback. Try instead:

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vlc - < video.mkv

Posted: **16 Dec 2019 13:43**

Rémi Denis-Courmont. thank you for your reply.
You are right:"file might not be suitable for nonseekable playback"
By attention to your hint I converted it to mpegts format and now it works fine with

:

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cat video.ts | vlc -

but still there is the problem when i try to pipe using mkfifo:

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mkfifo test
cat video.mkv > test
vlc test

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