Re: [Mjpeg-users] mplex not recognizing mpeg1 from mencoder

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

On 4 Jan 2004, Florin Andrei wrote:

> MPEG2 without B frames makes some DVD players choke. The default

	What player is so braindamaged and standards non-compliant as to
	choke on an *optional* part of the MPEG-2 specs?   (B frames are 
	optional).

	Are you sure that was the cause or was it pusing the bitrate too high
	and generating streams out of spec on the peaks?   As I recall the
	stuttering was caused by -b 9000.  That can work with commercial
	pressed DVDs but some players have problems with RECORDABLE media
	at high bitrates due to the lesser reflectivity of the media.

> What would be the new -R setting to imitate the old behaviour? Would it
> be "-R 2"?

	Yep, that's the old behaviour.   

	I have a hunch that any problems with -R 0 are due to other factors
	and not the lack of B frames.   

	Hmmm - having said all that it might be that DPME (Dual Prime Motion
	Estimation) might be a possible  problem area - can't recall if that was
	required or not.   It is possible to have no B frames and not use
	DPME (but no B frames are a requirement to use DPME - at least at
	MP@ML).   If anything I'd have expected an old portable (Audiovox)
	to have a problem with no B frame based SVCD and it sailed right thru.

	Steven Schultz