[FFmpeg-user] Unable to read from stdin for certain .MOV files

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Nov 8 14:59:53 CET 2012

Jesse Gordon <tojesseg <at> gmail.com> writes:

> I seem unable to read with ffmpeg from stdin for .MOV 
> files from my Canon EOS T2I.

It is not generally possible to read mov files via stdin, 
because it is perfectly normal that mov files contain 
necessary information needed for decoding (like codecs 
etc.) at the very end of the file.
(This is not a limitation of FFmpeg, but a feature of the 
mov file format.)

> It used to work in the past I know, but with recent
> versions it hasn't.

That is extremely unlikely / you tested a different mov 

If you have a mov file that allowed in the past to be 
read via stdin but does not work anymore, please share 
a sample (there may be a bug), but remember that what 
you want (reading all files via pipe) cannot work in 

Carl Eugen

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