LinHES Forums :: View topic - transcoding using mencoder

Where would you like to export the files to? [.] /myth/video
Enable Myth cutlist? [Yes] n
Enable noise reduction (slower, but better results)? [Yes] n
Enable deinterlacing? [Yes]
Crop broadcast overscan (2% border)? [Yes]
Audio bitrate? [128]
Variable bitrate video? [Yes]
Multi-pass (slower, but better quality)? [Yes]
Video bitrate? [960]
Default resolution based on 4:3 aspect ratio.
Width? [624]
Height? [464]

Now encoding: Terminator 3: Rise of the Machines: Untitled
Encode started: Tue Nov 22 11:35:45 2005
First pass...
Waiting for mythtranscode to set up the fifos.
Starting ffmpeg.
processed: 194155 of 2357976 frames (8.23%), 16.54 fps
mythtranscode finished.
processed: 194156 of 2357976 frames (8.23%), 16.54 fps
ffmpeg finished.
Final pass...
Waiting for mythtranscode to set up the fifos.
Waiting for mythtranscode to set up the fifos.
Starting ffmpeg.
processed: 194143 of 2357976 frames (8.23%), 14.85 fps
mythtranscode finished.
processed: 194156 of 2357976 frames (8.23%), 14.85 fps
ffmpeg finished.

Encode finished: Tue Nov 22 18:29:21 2005
Encode lasted: 6h 53m 36s

Author:	declanh [ Sat Nov 19, 2005 2:21 pm ]
Post subject:	transcoding using mencoder
Divx transcoding using mencoder seems pretty fast (faster than I was expecting at any rate on a 1.4ghz athlon). unfortunately the quality is suboptimal with mencoder /myth/tv/1069_20051118233500_20051119020000.nuv -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=680:vhq:vqmin=2:vlelim=-4:vcelim=9:lumi_mask=0.05:dark_mask=0.01 -vop scale -zoom -xy 640 -oac mp3lame -lameopts abr:br=96 -o /myth/video/The_Game__11182335.avi anyone suggest a better command line for this ?

Author:	pkscout [ Sat Nov 19, 2005 3:59 pm ]
Post subject:
I'm not a command line guy when it comes to menencoder, but I don't see anything there for 2-pass. You'll probably get much better quality with 2-pass encoding. Of course it'll take about twice as long, but then it'll probably take about as long as you thought it should.

Author:	spalVl [ Sat Nov 19, 2005 7:25 pm ]
Post subject:
may want to give nuvexport a try. I have been really impressed. If you want to stick with Divx Code: nuvexport If you want to use multipass XviD Quote: nuvexport --transcode

Author:	declanh [ Sun Nov 20, 2005 6:55 am ]
Post subject:
Yeah - looked at this before - but gave up cos it was transcoding at less than 1 frame/second 2 pass mencoder was managing up to 35 fps which made it seem more attractive to me. even nuvexport in single pass is much slower - (according to my benchmarks over 100hours elapsed to do a single film (never waited that long for it to complete!) - this compares with 2-3 for mencoder)

Author:	declanh [ Tue Nov 22, 2005 1:38 pm ]
Post subject:	nuvexport - stats weirdness
More oddness here - keen to explore the diff between nuvexport and mencoder i decided to transcode using nuvexport and just wait and see how long it would take to produce the divx. When you start it says anything from 1-15fps depending on the options chosen I chose the following Code: Where would you like to export the files to? [.] /myth/video Enable Myth cutlist? [Yes] n Enable noise reduction (slower, but better results)? [Yes] n Enable deinterlacing? [Yes] Crop broadcast overscan (2% border)? [Yes] Audio bitrate? [128] Variable bitrate video? [Yes] Multi-pass (slower, but better quality)? [Yes] Video bitrate? [960] Default resolution based on 4:3 aspect ratio. Width? [624] Height? [464] Now encoding: Terminator 3: Rise of the Machines: Untitled Encode started: Tue Nov 22 11:35:45 2005 First pass... Waiting for mythtranscode to set up the fifos. Starting ffmpeg. processed: 194155 of 2357976 frames (8.23%), 16.54 fps mythtranscode finished. processed: 194156 of 2357976 frames (8.23%), 16.54 fps ffmpeg finished. Final pass... Waiting for mythtranscode to set up the fifos. Waiting for mythtranscode to set up the fifos. Starting ffmpeg. processed: 194143 of 2357976 frames (8.23%), 14.85 fps mythtranscode finished. processed: 194156 of 2357976 frames (8.23%), 14.85 fps ffmpeg finished. Encode finished: Tue Nov 22 18:29:21 2005 Encode lasted: 6h 53m 36s What I cant understand it 1) why it completed in only 7 hours (my estimations based on the framerate and the percentage complete suggested closer to 100hrs) 2) why when it finished it says 8.23% and not 100% is this a issue with nuvexport or am i missing something ?

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Author:	MisoSoup777 [ Tue Nov 22, 2005 2:30 pm ]
Post subject:
I use the following to get good results from MPEG2 files... Code: #set the variables for transcoding opt="vbitrate=2160000:mbd=2:keyint=132:vqblur=1.0:cmp=2:subcmp=2:dia=2:mv0:last_pred=3" #Pass 1 mencoder -oac mp3lame -lameopts abr:br=224 -ovc lavc -lavcopts vcodec=msmpeg4v2:vpass=1:$opt -mf type=sgi:fps=29.97 -vf lavcdeint -vf-add scale -zoom -xy 720 -o /dev/null /PATH/TO/INPUT.FILE #Pass 2 mencoder -oac mp3lame -lameopts abr:br=224 -ovc lavc -lavcopts vcodec=msmpeg4v2:vpass=2:$opt -mf type=sgi:fps=29.97 -vf lavcdeint -vf-add scale -zoom -xy 720 -o /PATH/TO/OUTPUT.avi /PATH/TO/INPUT.FILE I use msmpeg4v2 to ensure it will play on windows (I'm normally transcoding unencrypted DVD's of inhouse materials). To be fair, this is an adaptation of some other info I found on the net...

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