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mencoder [2013/06/28 21:35] – created beandogmencoder [2013/06/28 21:37] (current) – beandog
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 Some ideas though: Some ideas though:
  
-- force the incoming fps and/or outcoming fps +  * force the incoming fps and/or outcoming fps 
-- try -mc 0 and/or -noskip with mencoder (the opposite being -vf  +  * try -mc 0 and/or -noskip with mencoder (the opposite being -vf harddup=1)
-harddup=1)+
  
 Positive results: Positive results:
  
 (movie starts at 29.97, but switches immediately to 23.97) (movie starts at 29.97, but switches immediately to 23.97)
-mencoder movie.vob -aid 128 -ovc lavc -oac copy -o movie.avi -mc 0  + 
--noskip -fps 24000/1001+<code>mencoder movie.vob -aid 128 -ovc lavc -oac copy -o movie.avi -mc 0 -noskip -fps 24000/1001</code>
  
 comes close, same scenario: comes close, same scenario:
-transcode -i movie.vob -o transcode.avi -a 0 -b 128,0,0 -w 2200,250,100  + 
--A -N 0x2000 -M 2 -Y 4,4,4,4 -B 1,11,8 -R 0 -x vob,vob -y xvid4 -f 0,1+<code>transcode -i movie.vob -o transcode.avi -a 0 -b 128,0,0 -w 2200,250,100 -A -N 0x2000 -M 2 -Y 4,4,4,4 -B 1,11,8 -R 0 -x vob,vob -y xvid4 -f 0,1</code>
  
 Something to try: Something to try:
-audio delay (-audio-delay on mencoder, test float value with mplayer  + 
--delay 0.2 movie.avi)+audio delay (-audio-delay on mencoder, test float value with mplayer  -delay 0.2 movie.avi)
  
 mencoder basics: mencoder basics:
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 worth it). worth it).
  
-example: mencoder video.wmv -o video.avi -ovc lavc -oac mp3lame -fps 29.97+example:  
 +<code>mencoder video.wmv -o video.avi -ovc lavc -oac mp3lame -fps 29.97</code>
  
-example notes: -oac lavc uses mp2 by default as audio.  I've found my  +example notes: -oac lavc uses mp2 by default as audio.  I've found my files are smaller using -oac mp3lame each time.  -ovc lavc uses divx4.
-files are smaller using -oac mp3lame each time.  -ovc lavc uses divx4.   +
-Use -fps 29.97 since that's the NTSC standard framerate.  Encoding at  +
-another framerate sometimes makes the video fuzzy (wmv -> avi).+
  
-"-of" sets the format type, default is "avi".  Other type you would use  +Use -fps 29.97 since that's the NTSC standard framerate.  Encoding at another framerate sometimes makes the video fuzzy (wmv -> avi).
-is "mpeg".+
  
-"-oac" is the audio codec to use.  No default is set.  Options are  +"-of" sets the format type, default is "avi".  Other type you would use is "mpeg".
-"copy" (use the old codec), "pcm" (uncompressed), "mp3lame" and "lavc"  +
-(another audio codec).+
  
-"-ovc" is the video codec to use.  No default is set.  Options I  +"-oac" is the audio codec to use.  No default is set.  Options are "copy" (use the old codec), "pcm" (uncompressed), "mp3lame" and "lavc" (another audio codec). 
-would use are "copy" (use old codec, don't re-encode), "divx4" (div4/5),  + 
-"lavc" (supposedly best quality) and "xvid" (open source mpeg4 codec).+"-ovc" is the video codec to use.  No default is set.  Options I would use are "copy" (use old codec, don't re-encode), "divx4" (div4/5), "lavc" (supposedly best quality) and "xvid" (open source mpeg4 codec).
  
 using "-lavcopts": using "-lavcopts":
  
-I see a lot of examples that needlessy add "-lavcopts vcodec=mpeg4",  +I see a lot of examples that needlessy add "-lavcopts vcodec=mpeg4", when the default video codec already is mpeg4 (and the best one too use).  There's no reason to change the default.
-when the default video codec already is mpeg4 (and the best one too  +
-use).  There's no reason to change the default.+
  
 You can use lavcopts to do a three pass encoding to improve the quailty. You can use lavcopts to do a three pass encoding to improve the quailty.
  
 +<code>
 rm frameno.avi rm frameno.avi
-mencoder input.avi -ovc frameno -o frameno.avi -oac mp3lame -lameopts  +mencoder input.avi -ovc frameno -o frameno.avi -oac mp3lame -lameopts vbr=3 
-vbr=3 +mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac copy -o output.avi 
-mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac copy -o  +mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vpass=2 -oac copy -o output.avi  
-output.avi +</code>
-mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vpass=2 -oac copy -o  +
-output.avi +
  
 # encode from wmv -> avi # encode from wmv -> avi
 +<code>
 mencoder video.wmv -o video.avi -ovc lavc -oac mp3lame -fps 29.97 mencoder video.wmv -o video.avi -ovc lavc -oac mp3lame -fps 29.97
 +</code>
  
 # rip DVD # rip DVD
-2-pass encode of a DVD to an MPEG4 ("DivX") AVI while encoding the audio  +2-pass encode of a DVD to an MPEG4 ("DivX") AVI while encoding the audio track to MP3.
-track to MP3.+
  
-mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac mp3lame  +<code> 
--lameopts vbr=3 -o movie.avi +mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac mp3lame -lameopts vbr=3 -o movie.avi 
-mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:vpass=2 -oac mp3lame  +mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:vpass=2 -oac mp3lame -lameopts vbr=3 -o movie.avi 
--lameopts vbr=3 -o movie.avi+</code>
  
 # XviD 2-pass # XviD 2-pass
  
 +<code>
 mencoder dvd:// -ovc xvid -oac copy -xvidencopts pass=1:vhq=1 mencoder dvd:// -ovc xvid -oac copy -xvidencopts pass=1:vhq=1
 +</code>
  
 # encode only so much # encode only so much
 +
 use "-endpos <secs>" to test if the encoding is going to work. :) use "-endpos <secs>" to test if the encoding is going to work. :)
  
 # detect aspect ratio for DVDs # detect aspect ratio for DVDs
 +
 +<code>
 mplayer dvd://1 -vf cropdetect mplayer dvd://1 -vf cropdetect
 +</code>
  
 * Mencoder + XviD * Mencoder + XviD
  
-Does mencoder ignore my xvidencopts flags??  Anytime I pass a  +Does mencoder ignore my xvidencopts flags??  Anytime I pass a bitrate=foo value, it ignores it completely and seems to want to set it to it's own value.  Kind of odd.
-bitrate=foo value, it ignores it completely and seems to want to set it  +
-to it's own value.  Kind of odd.+
  
 * images * images
  
-mencoder mf://image.jpg -ofps 25 -mf fps=.002:type=jpg -ovc lavc -vf  +<code> 
-harddup -oac copy -of avi -o output.avi -audiofile audio.mp3+mencoder mf://image.jpg -ofps 25 -mf fps=.002:type=jpg -ovc lavc -vf harddup -oac copy -of avi -o output.avi -audiofile audio.mp3 
 +</code>
  
 # Expanding # Expanding
  
-Some videos (PAL DVDs, often) will come in 4:3 aspect with squished  +Some videos (PAL DVDs, often) will come in 4:3 aspect with squished displays.  You need to expand it so it has black bars at top/bottom.
-displays.  You need to expand it so it has black bars at top/bottom.+
  
 Pretty simple, but you have to reencode the video with mencoder. Pretty simple, but you have to reencode the video with mencoder.
  
 +<code>
 mencoder foo.mpg -vf expand=320:::::4/3 mencoder foo.mpg -vf expand=320:::::4/3
 +</code>
  
-Using a width smaller than the input will just make it fill to that  +Using a width smaller than the input will just make it fill to that aspect ratio.
-aspect ratio.+
  

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