[mythtv] mythencode.pl script

Rob Snow lists at dympna.com
Fri Jul 11 11:59:50 EDT 2003

Ugh, so it just needs to be changed back to a system() from and exec()?  If so, I'll 
create a patch.  I don't have MythTV up and running right now so I can't test it.  If you 
could create a patch it would be even better, so we can verify it works. 
I recently moved and haven't spent the time to get myth back up and running, 
actually, I'm thinking of trying snapstream out again (I've been licensed for over 2 
years on it) since it meets my requirements of having portable output files. 
mythencode.pl is an attempt to hack something up to create useful (for me this 
means portable) output file, but with the issues with mencoder crashing sometimes 
and the poor final output from double encoding I've not put much time into it lately. 
On Fri, 11 Jul 2003 02:18:46 -0500, mojo wrote 
> i noticed that the updated mythecode.pl with 0.10 is still broken... 
> the second pass never executes on 2 pass encodes. i did some  
> searching on the web about the exec() perl command and it appears  
> that is the wrong command to use. exec() will abandon the host  
> script in favor of whatever command or script it executes and does  
> not return to the original script which called it so that the "exec  
> $pass2" command never gets executed (nor does any code inserted  
> after it). To fix this simply replace all instances of 'exec' (i see  
> only three) with 'system' and its fixed (both passes run). Or the  
> workaround would be to just always do one-pass encodes. 
> Also the second pass should also include vhq and v4mv options if  
> they are used in the first pass (which they are). 
> I still havent figured out why i'm getting tons of these errors: 
> Pos: 910.4s  24844f (71%)  29fps Trem:   5min 153mb  A-V:-0.068 [910:96] 
> 1 duplicate frame(s)! 
> Pos: 910.8s  24854f (71%)  29fps Trem:   5min 153mb  A-V:-0.068 [910:95] 
> 1 duplicate frame(s)! 
> perhaps my recording settings are too high (mpeg4, 2200 on an XP1700) 
>  and frames are getting dropped? fyi, those errors have nothing to  
> do with the script as i get them even when i do a simple 'mencoder  
> -oac copy -ovc copy -idx -o output.avi'... i'd be most grateful if  
> anyone could shed some light on that topic for me... I'm not the  
> only one, there is another guy on the users list experiencing the  
> same thing.  All of these files play fine in myth, but the converted  
> versions have poor audio/video sync. 
> Thanks, 
> Sean 
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