Re: workaround (PPC) for mpeg2enc's buggyness

On Fri, 23 Mar 2007, Burkhard Plaum wrote:

> If you already talk about "competitors": Are there any figures about how
> mpeg2enc compares to ffmpeg (wrt to speed, quality and bitstream 
> compatibility)?
> Just curious.

	I do not have recent/current figures.  A couple years ago  when I was
	active on the ffmpeg mailing list a "competition" was done  - each
	side claiming its encoder was better of course ;).  IF you turn off
	B frames (now the default in mpeg2enc) the speed difference between
	the two was not large (other factors would almost certainly dominate
	the encoding pipeline).

	At that time ffmpeg had rate control issues that were causing coasters
	to be burned in fairly large quantities (rate too high).  Almost 
	certainly fixed now but I haven't had the inclination to revist the
	situation.

	Qualitywise I always had the feeling ffmpeg valued speed more.  The
	video had a somewhat grainy/gritty look to it but that was probably
	just my eyes and the lighting conditions.

	Both encoders suffer the splotches or blockyness in the dark/black
	areas.  I know that topic has come up numerous times on the mjepgtools
	mailing lists.  The only workaround that I have found that helped
	was to heavily preprocess the data in Final Cut first.  HOWEVER,
	the situation has, from initial tests, CHANGED greatly.  The new
	encoder does a MUCH BETTER job of encoding the dark areas - NO
	blockiness in the first couple enocdings that have been done.

	Cheers,
	Steven Schultz


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