VLC can't recognize the input's format

[Martin2991]

Hello. I recovered some shift-deleted .flv files and when i try to open them with VLC player it says this message VLC can't recognize the input's format:
The format of 'D:\xxxxxxxxxxxxxxxxxxxxxxx' cannot be detected. Have a look the log for details. What should I do ?

[Rémi Denis-Courmont]

Rename them to whatever.flv.

[Martin2991]

Rename them to whatever.flv.

I tried but still doesn't work. It works only for the .avi / .wmv files i recovered.

[Rémi Denis-Courmont]

Sounds like the file is corrupt

[abbas]

hi, i got this error msg: "VLC does not support the audio or video format "undf". Unfortunately there is no way for you to fix this." however it did play the file earlier

[Jean-Baptiste Kempf]

Delete preferences and cache.