Re: [Mjpeg-users] re-editing

[Steven M. S. <sm...@2B...>]

On Tue, 13 Jan 2004, E.Chalaron wrote:

> Was wondering if re-editing a mpeg2 file produced by mjpeg tools could be 
> possible with Adobe premiere ? if so is there any particular parameters to 
> set (-g -G) ?

	mpeg2 isn't really meant for editing but I'm sure you know that ;)

	I suspect you'll at least want to create closed GOPs using the 
	'-c' option.

	The  GOP size shouldn't matter but I don't know anything about
	Adobe Premiere's allergies.   I know that by default Apple's encoder
	uses closed fixed sized GOPs with a size of 15.   

	To be completely safe I'd suggest trying "-c -g 15 -G 15", if you're
	feeling adventuresome and have some time you might leave out the -g
	and -G and see if Premiere will work with variable GOPs.  

	The advantage of fixed size GOPs is that you are dealing with a known
	and constant unit of time (15/25 of a second for PAL).   You can set
	the size down to 12 and that would give you ~1/2 second resolution
	without too much of a penalty in filesize.

	Cheers,
	Steven Schultz