[mythtv-users] Re: black border in ffmpeg nuvexport

[Steve Elzinga]

I had this problem as well.  I ran nuvexport in debug
mode only to find out that nuvexport was putting in
padding for some reason.  The source had black bars on
the right and left sides, nuvexport padded the top and
the bottom.  When the source had no padding at all
nuvexport still padded the top and the bottom.  I have
not dug down into nuvexport's code to figure this out
but for now I am using the modified command line that
nuvexport uses to transcode my shows.

Steve

--- David Whyte <david.whyte at gmail.com> wrote:

> Gavin,
> 
> Did you ever get the chance to look at this?  I have
> noticed all of my
> exports to DivX have this black border and Windows
> Media player
> doesn't allow you to zoom it out of the way.
> 
> I am currenty doing an export to DVD and hope I
> don't have the same problem :|
> 
> Cheers,
> Dave
> 
> On 11/20/04, Gavin Hurlbut
> <gjhurlbu+mythtv-users at beirdo.ca> wrote:
> > Chris Petersen <lists at forevermore.net> wrote:
> > >> I'm working on exporting to MPEG using ffmpeg
> in nuvexport, I can get it
> > >> working really fast ( 70-120fps on my Sempron
> 2400+) but the only
> > >> problem I have remaining is that despite the
> source and the destination
> > >> being the same resolution (352x240) the
> resulting MPG has a black border
> > >> all around it - the frame ends up being
> something like 340x232 or
> > >> something odd like that...
> > 
> > > Does your source also have this border?  Most
> broadcasters add some sort
> > > of padding to account for the tv's picture tube
> extending beyond the
> > > border of the tv's frame.  That's why I added
> the "crop" option on the
> > > nuvexport modules that I could (the ones that
> use transcode).
> > 
> > It's also possible that ffmpeg is padding it to
> maintain the aspect ratio of
> > the original recording.  Although, if it's
> seemingly padding on all sides, that
> > would almost assuredly be the capture card
> recording the entire TV signal
> > including the built-in overscan, etc.
> > 
> > I may have time to look at this on the weekend,
> we'll have to see.
> > 
> > Ciao
> > Gavin
> > 
> > > -Chris
> > 



		
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