Really interesting thread on the strengths and weaknesses of different
ways to encode material.
Have any of you looked at the two pass MPEG2 code used in avidemux2. Its
based on the mjpeg project, borrowing a 2 pass engine from XviD I
belive. Anyhow I use this a lot when targetting final file size.
One useful feature is it outputs a statistics file with the final MPEG 2
file when running in 2 pass mode so you get some idea of how efficient
the encode has been.
For example I take an off air D1 PAL video capture, edit out adverts to
45 minutes approx
1. Clean up the black borders, ie remove non-visible junk.
2. Use the DGraft Kern Deinterlacer filter -
Yes I know I should leave it interlaced, but a lot of my material was a
film -> TV transfer and de-interlaces really well.
3. Use the Mplayer HQ Denoise filter.
4. Encode to MPEG 2, target filesize of 1300 (3 episodes per DVD with
Audio), Max Bitrate 8000
Now if the video is left interlaced I get an average Q of 8 with, and
generally average video quality.
With the deinterlaced video I get an average Q of 3-4 and pretty damn
good video quality.
Have a play and see what you think. It also has useful filters for
telecine etc.
Steve
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