I have been using mpeg2enc from the current CVS tree together with
transcode to encode DVD compliant MPEG-2 data from PAL DV input.
No rescaling of the input material is done, and I only use the 'DNR'
plugin for transcode which does fairly minimal noise reduction on the
input material.
The results of this have generally been pretty impressive, with a
quality that looks as good as commercial encoders for a lot of inputs.
The one big problem that I do have with the toolset is that I get
ghosting in very dark scenes, to the point of making some stuff *very*
uncomfortable to watch -- like seeing it through a heavy, dark fog or
something.
The mpeg2enc command line[1][2] is:
] mpeg2enc -v 0 -f 8 -b <bitrate> -F 3 -n p -a 2 -o <output> \
-a 2 -q 2 -I 1 -r 24 -4 2 -2 1 -N 1.5 -Q 1.5
The bitrate is usually around 5500 to 7000, and the ghosting doesn't
seem to be greatly affected by that, sadly.
The effect is that any motion in the scene will leave a notably brighter
patch behind when it moves, for every frame before the next I frame.
Until then, though, these images very slowly fade out while making it
hard to distinguish the actually interesting parts of the image.
So, is there anything that can be done to improve this? This is the one
major problem I have with my video encoding pipeline at the moment, so I
am pretty motivated to try and fix it.
If the fix is "replace the motion predictor" or something like that, I
am also interested in knowing; I am willing to at least look at the
task.
Daniel
Footnotes:
[1] started by transcode, but this is what it runs.
[2] ...and the aspect ratio is specified twice. I just noted that.
--
Intelligence is merely higher ablity, stupidity is the lack of skill in using
whatever abilities you have.
-- Erik Naggum
-------------------------------------------------------
This SF.net email is sponsored by: eBay
Get office equipment for less on eBay!
http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5
_______________________________________________
Mjpeg-users mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/mjpeg-users
