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Sorry, i mixed up home and business Mailadresses. > > I have used a BT878 card for capturing from TV and VHS via > > composite with a Linux(now 9.0) and mjpegtools 1.6.2-0. > > Now, we have DVB-T and i would like to keep this setup for > > some time, it works fine. > > > > Since with DVB-T there are still blocking artifacts, i would ask > > for the best parameters for mpeg2enc. > Do you still record with the BT878 card ? Yes, from the DVD-T Box via fbas(composite). This Signal contains already Blocks due to the mpeg-bitrate. > > This is for TV/VCR. With DVB-T, there is no noise(?), but blocking > > artifacts. My preference is Quality, not size of the mpg-file. > It would help if you could tell us the other options ($q, $ZIEL ...). Oh, sorry, my commandline for TV-VHS is something like that: yuvdenoise -L110 -C110 -S150 -t2 -b.... mpeg2enc -a2 -np -f8 -F3 -q[2|4] -R0 -D10 -N10 -Khi-res -41 -21 -r32 -c -P -s -b9500... For me this was empiric the Optimum for best Quality(perhaps there are improvements). Some parameters are still defaults(for this version). > And the average bitrate you have. > You might take a look at the -E option that can help a little. > Some option shouldn't be needed, like -n, -F , -s, -a. > Do the blocking artefacts vanish if you use a other > quantisation matrice? Ok, I will play around with this three points. > You use -N (reduce hf) and -H (via the -Khi-res) (keep HF). You might > try to drop the -Khi-res, or replace it with a other quantization > matrice. Ok. > > Is yuvdenoise still neccessary? Does anywhone have still ideas > > for optimal parameters not boosting up blocking artifacts? > That depends on the bitrate you have. If the filesize is still low > enough for you without the denoiser, you do not need it. > Who much difference in the average bitrate do you have when you encode > the movie once with the denoiser and once without ? I have to try out this, a DVB-T mpeg-stream doesnt be noisy, is that true? Not noisy, but blocky? Thank you, i will report about what i found out. viele Grüße, Frank Albrecht ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
