Quantcast Mencoder: Mencoder and File Prediction to Reduce File Size - digitalFAQ.com Forums [Archives]
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03-03-2004, 09:33 AM
ladiaz ladiaz is offline
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Hello All -

Is there a recommended method to do file prediction using mencoder? What's the easiest way to adjust the quality setting? Trying to increase the amount of time i can store on a DVD. Current settings are producing MPG files of 114MB for every 4 minutes (w/ 192 Audio Stream) for an average of 125 minutes per DVD - 720x480 video.

Using PVR-250 video Output with the following AVS script. Thanks for your help!

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\mpasource.dll")

video = mpeg2source("f:\VIDEO.D2V")
audio = MPASource("f:\VIDEO MPA T01 DELAY 0MS.MPA", normalize=false)
#DelayAudio(audio,-0.123)
AudioDub(video, audio)
Trim(10716,16824)

converttoYUY2()
Smoothdeinterlace(doublerate=true, TFF=true, blend=false).selectodd()
ConverttoYV12()
BicubicResize(352,576)
TemporalSoften(1,5,5,5,2)
Deen()
Unfilter(60,0)
LanczosResize(720,480)
Letterbox(16,16,16,16)
DCTFilter(1,1,1,1,1,0.75,0.5,0)
ConverttoYUY2()
Limiter()

MenCoder Batch File
@echo off
set mencpath=d:\video\mplayer
set output=d:\video\out
set intra="8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,3 7,12,14,18,27,29,34 \
,37,38,22,26,27,31,36,37,38,40,26,27,29,36,39,38,4 0,48,27,29,34,37,38, \
40,48,58,29,34,37,38,40,48,58,69,34,37,38,40,48,58 ,69,79"
set inter="16,18,20,22,24,26,28,30,18,20,22,24,26,28,3 0,32,20,22,24,26,28, \
30,32,34,22,24,26,30,32,32,34,36,24,26,28,32,34,34 ,36,38,26,28,30,32, \
34,36,38,40,28,30,32,34,36,38,42,42,30,32,34,36,38 ,40,42,44"

%mencpath%\mencoder -of mpeg -ovc lavc -lavcopts vcodec=mpeg2video:ildct:ilme:intra_matrix=%intra%: inter_matrix=%inter%:mbd=2:vrc_minrate=300:vrc_max rate=8000:vbitrate=3000: \
vrc_buf_size=1835:keyint=18:vmax_b_frames=2:vqblur =0:aspect=4/3: \
vstrict=-1 -ofps 29.97 -nosound %1 -o %output%\%~n1.mpg

%mencpath%\bbdmux %output%\%~n1.mpg 0xe0 \
%output%\%~n1.m2v

del %output%\%~n1.mpg
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  #2  
03-03-2004, 12:20 PM
digitall.doc digitall.doc is offline
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Quote:
Originally Posted by ladiaz
Is there a recommended method to do file prediction using mencoder?
Wellcome ladiaz,
I still didn't explore file prediction with mencoder. But for every encoder I use, I employ the same method from incredible: the ping-pong method (make use of search to find the thread, I don't exactly remember where is). Is based in Slicer avisynth filter. I'll try it with mencoder. But through file prediction you won't reduce file size, you'll just get the predicted final file size.
Quote:
Originally Posted by ladiaz
What's the easiest way to adjust the quality setting?
Sorry, I again send you to another thread, and this is a little hard to read (for the number of posts), but you'll get a lot of nice parameters: http://www.kvcd.net/forum/viewtopic.php?t=9074
If you want to decrease quality and file size you can use mbd=0, vlelim and vcelim (look for better parameters, the JVT are nice), set vrc_maxrate=5000 and vbitrate=2000,... If you want to increase quality instead, make use of quality settings as trell, cbp,...
But is better you read the thread
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