[FFmpeg-user] 'Duration: N/A' for some videos ?

[Carl Eugen Hoyos]

Robert Krüger <krueger <at> lesspain.de> writes:

> I assume that for some formats tools like mediainfo 

[...]

> take that approach but I have not verified that by 
> looking at their code.

(Is this really true? Sounds unlikely to me.)

>  <at> Carl: Of course you may interprete parsing 
> headers as a subset of decoding, I just wanted to 
> make sure he did not get the impression he had to 
> decode (as in decoding image data) the whole 
> video to get a correct duration.

You are (most probably) right but I think answers 
should be (or at least are) based on (current) 
FFmpeg here, it is of course not wrong to mention 
what would be possible if FFmpeg would behave (in 
this case: very) differently.

Carl Eugen