[MPlayer-users] MPlayer works like a charm, just need a few tips!

[Kris Kielhofner]

gabor wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> On Thu, 2003-01-23 at 19:54, Kris Kielhofner wrote:
> 
>>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>>Hello all,
>>
>>	MPlayer is the coolest thing that I have ever seen!  Because of it, I 
>>am finally able to make use of my dual processor AMD Athlon MP machine. 
>>  I have no complaints, but I am wondering how to do a couple of things:
>>
>>1) I have several Divx files that I have created with the mpeg4 codec of 
>>libavcodec.  The problem is, the video is in 4:3 format with the stupid 
>>black bars.  I want to crop the video without having to re-encode the 
>>AVI file (thus resulting in a loss of quality), so that the aspect ratio 
>>of the output file is 16:9 like it should be.  I have run mplayer -vop 
>>cropdetect to determine the proper cropping parameters.  I understand 
>>that MPlayer doesn't use -vop options with -dumpstream.  I also 
>>understand that Mencoder doesn't use -vop options with -ovc copy and 
>>-oac copy.  So what can I do to crop these AVI files that I already made 
>>without losing quality?
> 
> 
> you cant.
> 
> if you want to crop, you'll have to reencode. :(
> 
> 
>>2)  Is there any way to make Mencoder SMP aware?  Right now I have no 
>>problem with running two instances of it to use my hardware to it's full 
>>potential, but I have to maintain two seperate working directories for 
>>encoding.  Not a big deal, but would be nice.
> 
> no, ... mencoder ( as mplayer ) is single threaded...
> 
>>3)  What is the best way to handle combining dual sided and or double 
>>disc DVD's (DVD's where the movie actually spans more that one side, ie 
>>Goodfellas)?  I have tried ripping each side, then cat'ing each of those 
>>files into mplayer with streamdump and - (to use stdin).  It seems to 
>>work (output file is about the size it should be), except that I am 
>>unable to seek in the file, and the audio doesn't work.  I have tried 
>>corresponding options for Mencoder, as well as rebuilding the index 
>>(does that make a difference with MPEG2 video like DVD's)?  I have also 
>>tried Mencoder with -ovc copy -oac copy into yet another file, but it 
>>still doesn't work.
> 
> 
> hmm... tell us what exactly are you trying to achive?
> one big vob file? one big mpeg2 file?
> 
> for creating rips, why don't simply 
> 
> cat *.vob | mencoder 
> 
> and reencode the audio + video....
> 
> 
> 
> 
>>
>>I should also mention that I have several friends that are thinking of 
>>converting to Linux just so that they can use MPlayer! (Who can blame them)?
> 
> :)
> 
> gabor
> 
>>
>>Thanks a lot guys!
>>
>>Kris Kielhofner
>>
>>_______________________________________________
>>RTFM!!!  http://www.MPlayerHQ.hu/DOCS
>>Search:  http://www.MPlayerHQ.hu/cgi-bin/htsearch
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> 
> 
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cat *.VOB | mencoder OPTIONS -o goodfellas -


Does not exactly work, well, it does, except that the output file has no 
  sound!  I am doing this with 2 VOB files, one for each side of the DVD.

Thanks,
Kris