[Mplayer-advusers] mencoder crash/fail with some DVDs/VOBs

[Julian Mayer]

>>> This looks like interlaced video.  I think 3 pass encoding does not
>>> work with these.  If that's the problem you are facing, just rm
>>> frameno.avi and do -oac mp3lame during all passes and it should be 
>>> ok.
>>  the video is not interlaced! (transcode can detect that)
> the better word is 'field-coded', not nececssary interlaced, although 
> thsi
> coding method has no much sence for progressive (non-interlaced) video.
> anyway i doubt that any app (be it transcode or other) can reliable 
> detect
> interlacing, sometimes even teh human eye+mind combination fails...
hm, if an app can render MPEG2 video, it must also know it is 
interlaced or not!? am i wrong here?
>
>> any idea how i can draw the developers attention to that problem? the
>
> if you mean mplayer developers, they do read this list.
> this is why we really hate beginner questions and incomplete 
> bugreports here.
well i made a complete bugreport in my initial post (well with a macosx 
backtrace instead of a gdb one, but i can of course supply an gdb one 
too)

about beginner question....i searched both the whole documentation, FAQ 
and mailing list archives and could not find anything useful about this 
issue
>
>> sample .VOB and problem description are still in the incoming dir on
>> the ftp server...?
>
> probably.
> but it's a known limitation, and not possible to fix in mencoder
exactly what is the limitation here? i have 14 DVDs here that work fine 
with 3-pass-mencoder and one that does not (crashes mencoder just like 
reported)...the issue doesn't seem to be the interlaced video (because 
transcode says it isn't interlaced)... is there any way i can know 
(prior to encoding) if a DVD will work or mencoder will just crash?

> , without
> major hacks or architecture changes. i mean this isn't a bug.
if this isn't a bug, mencoder should print out a message that it can't 
encode this DVD (or .VOB) instead of silently mysteriously failing, or 
crashing!
>
>
> A'rpi / Astral & ESP-team

thanks, julian