[x264-devel] Method to get avi in via stdin

[Foxy Shadis]

I was thinking about this a while ago, but shelved it because I wasn't sure 
how to implement, but I thought I'd ask here. How about implementing 
something in muxers.c/open_file_yuv to detect an AVI (if the first four 
bytes are 'RIFF' and some joker isn't passing in a wav or midi, it's 
extremely unlikely to not be one), and in that case pass control to 
open_file_avis instead.

What I'm unsure about is how to leave the stream in condition for 
open_file_avis to read, without closing the stream. I thought about ungetc, 
but I don't know how well it'd work cross-platform, or whether fseek works 
on stdin. Any pointers?

The point of this is to allow ffmpeg or mencoder decoded video to be piped 
into x264 without having to specify dimentions and that other good stuff.

-foxyshadis


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