[mythtv-users] another mythencode.pl error

[mojo]

i have come really close with a few of my mencoder runs... i am pretty 
picky... several times i've had usable files but quality was low...
its all the ones with out-of-sync audio that puzzled me...

my best run was i think actually a 3-pass encode i did loosely following 
the mencoder docs guide for 3 pass.. had to add -idx and lavcdeint of 
course... cant remember if i did that on both 2nd and 3rd pass.. i think 
i did... resulting file was well-synced but i ditched it because the 
bit/pixel ratio came out too low and the video was grainy when full 
screened on my 1280x1024 desktop... i think part of my problem is that i 
record straight to mpeg4 not with rtjpeg which is what i think most 
people are doing...

Sean

p.s. noticed the fix in CVS ;-)

Rob Snow wrote:

> I agree is seems counter productive to do the deinterlace twice, 
> but..again..I couldn't get a clear answer on if this was required or not, so 
> I erred on the side of caution and did them the same.  By the way, the 
> .avi's produced by this don't always work with Windows.  I have no idea why 
> and it seems to happen regardless of the patch version/mencoder version 
> used. 
>  
> I really hope we get a -real- way to transcode soon instead of my hack.  My 
> wife and I like to pop a few shows on our laptops for when we travel and my 
> parents like to be able to schedule to record something when they are 
> traveling and be able to watch it when they return.  Of course all of this 
> is done on Windows boxen, hence the hack of mythencode.pl. 
>  
> -Rob 
>  
>  
> On Sat, 28 Jun 2003 07:02:01 -0500, mOjO wrote 
> 
>>what about the de-interlace option?  is it really necessary to  
>>perform that twice? could it be harmful to do that twice? 
>> 
>>the mplayer documentation is nice but if it answered all my  
>>questions it would be 5x longer!!  haha... 
>> 
>>mOjO 
>> 
>>p.s. i guess this transcoding stuff is coming out soon so this may  
>>all be a moot point... 
>> 
>>Rob Snow wrote: 
>> 
>>
>>>Oops, looks like thats a bug (vpass1/2).  I'll get a patch to fix it as 
> 
> soon  
> 
>>>as we get the next patch via CVS.  Robert was away this week and was 
> 
> going  
> 
>>>to apply the patch this weekend. 
>>> 
>>>vhq/v4mv: Actually, I'm not 100% certain either way.  From reading the  
>>>mplayer/mencoder lists it appears you should include them in the first 
> 
> pass  
> 
>>>in some questing/replies and not in others.  I don't have a definative  
>>>answer, but my intuition tells me (possibly wrongly :) that you want the  
>>>statistics from a pass that matches what you are going to be encoding 
> 
> with. 
> 
>>> 
>>>-Rob 
>>> 
>>> 
>>>On Fri, 27 Jun 2003 03:11:11 -0500, mOjO wrote 
>>> 
>>>
>>>>i probably shoulnt be saying "another" error... since the first one  
>>>>i posted was probably just specific to my version of NICE but this  
>>>>one looks like a plain old goof of the "i'm really too tired to be  
>>>>coding but i'm at it anyway variety"... 
>>>>
>>>>Please take a look at the code pasted at the bottom of this email. 
>>>>notice the options for the second pass down below... 
>>>>both passes are running with vpass=1 
>>>>
>>>>i'm not an expert on mencoder or anything but i read the docs and  
>>>>the second pass should say vpass=2 right? 
>>>>
>>>>i have a question also... if the vhq and v4mv options are being used  
>>>>on the second pass should they be getting used on the first pass  
>>>>too? or is that unneccessary? 
>>>>
>>>>thanks, 
>>>>mOjO 
>>>>
>>>>p.s. i know this belongs on the dev mailing list but i'm not on that  
>>>>one so deal with it :-P 
>>>>
>>>>-- SNIP from mythtv-0.91/contrib/mythencode.pl -- 
>>>>
>>>>} else { 
>>>>
>>>>                  print "Doing a two pass encode.\n"; 
>>>>                  $pass1="$nicestr $mencoder -idx $path$show.nuv - 
>>>>fps $fps -oac mp3lame -lameopts vbr=3:br=$aud_br -ovc lavc -lavcopts  
>>>>vcodec=mpeg4:vbitrate=$vid_br:vpass=1 -vop lavcdeint,$scale -aspect  
>>>>4:3 -o $outname.avi";                   $pass2="$nicestr $mencoder  
>>>>-idx $path$show.nuv -fps $fps -oac mp3lame -lameopts  
>>>>vbr=3:br=$aud_br -ovc lavc -lavcopts  
>>>>vcodec=mpeg4:vbitrate=$vid_br:vhq:v4mv:vpass=1 -vop lavcdeint,$scale  
>>>>-aspect 4:3 -o $outname.avi";                   print "\tPASS ONE=$pass1 
>>>
>>> 
>>>\n"; 
>>> 
>>>
>>>>                  print "\tPASS TWO=$pass2\n"; 
>>>>
>>>>                  if(!$test) { 
>>>>                        exec $pass1; 
>>>>                        exec $pass2; 
>>>>                  } 
>>>>} 
>>>>
>>>>exit(0); 
>>>>
>>>>-- EOF -- 
>>>>
>>>>_______________________________________________ 
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>>>>mythtv-users at snowman.net 
>>>>http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users 
>>>
>>> 
>>> 
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>>
>> 
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