[Mjpeg-users] Converting AVI to JPEG - Unreadable JPEG Images

[Richard C. <pj...@fu...>]

I'm trying to convert video recorded on my digital camera to a series of  
JPEG images.  I'm using the SVN version downloaded just an hour or two  
ago, with this command:

	lavtrans -f i -o %06d.jpg +n movie.avi

The JPEG images don't seem to be readable:

	pj@sucks:~/video/swing_jump$ convert 000000.jpg same.jpg
	convert: Huffman table 0x00 was not defined `000000.jpg'.

No other application wants to deal with the images either.

I can't get the sound to dump correctly either:

	lavtrans -f w -o audio.wav +n movie.avi	

	pj@sucks:~/video/swing_jump$ play audio.wav
	sox: Failed reading audio.wav: WAV file has unknown format type of 100

The problem there is just a two byte integer at offset 0x14 which is 0x100  
when it should be 1.  Perhaps the endianess is incorrect.  The JPEG data  
is far too complicated for me to figure out, so I'll attach one of the  
images to this message, assuming attachments are allowed.

I'm also not sure what to make of this "+n" option that seems to be  
required to make it work.  It's not television video, it's just plain  
video, and all I want to do is dump out the individual frames into image  
files, so I don't understand why I need to pretend as if it is NTSC video  
in order for it to work.  This "+n" isn't going to do anything strange  
like add or drop frames to try to match some other frame rate, is it?