[FFmpeg-user] XVID-Encoding with ffmpeg

[Francois Visagie]

> -----Original Message-----
> From: ffmpeg-user-bounces at ffmpeg.org [mailto:ffmpeg-user-
> bounces at ffmpeg.org] On Behalf Of Timothy Gu
> Sent: 06 March 2013 22:55
> To: FFmpeg user questions
> Subject: Re: [FFmpeg-user] XVID-Encoding with ffmpeg
> 
> On Fri, Mar 1, 2013 at 9:08 AM, llarevo at gmx.net <llarevo at gmx.net> wrote:
> > Hello,
> >
> > thank you for your quick reply.
> >
> >> > I would like to migrate from mencoder to ffmpeg, but I can't find
> >> > sufficient information how to "translate" the parameters for encoding
> >> > with xvid from the mencoder commandline to a sufficient ffmpeg
> >> > commandline.
> >>
> >> I don't think there is an "encopts" option in ffmpeg. You will need to
> >> translate all the xvid options to ffmpeg options.
> >
> > OK, I thought so.
> >
> >> > The xvidenc-configuration in mencoder is
> >> >
> >> > -xvidencopts
> >> >
> pass=1:profile=dxnhtpal:(no)greyscale:me_quality=6:max_bframes=1:noqp
> el:nogmc:(no)cartoon:quant_type=mpeg:trellis:(no)interlacing:chroma_me:c
> hroma_opt:vhq=4
> >>
> >> For example, -pass 1 -bf 1 and so on.
> >
> > OK, I found these already, but not all of them.
> >
> >> >
> >> > The most important part for me is profile=dxhtnpal because this
setting
> >> > ensures a maximum bitrate over 3 sec not over 8 MBit/s, and a
avaerage
> >> > bitrate not higher than around 4,8 MBit/s (cf.
> >> > http://www.mplayerhq.hu/DOCS/HTML/de/menc-feat-xvid.html)
> >>
> >>
> >> Use the table on
> >>
> http://www.mplayerhq.hu/DOCS/HTML/de/menc-feat-xvid.html#menc-
> feat-xvid-encoding-profiles
> >> to help you translate it.
> >
> > I know that site. My problem is, that I don't find some options from the
> > mplayer site in the ffmpeg man pages or ffmpeg-documentation.
> >
> > So my concrete question is: what is ffmpeg-syntax-equivalent for
> >
> > profile=htdxnpal
> 
> -s:v 720x576 -r 25 -maxrate 4854k -bf 1
> Unfortunately, I cannot find an option for peak bitrate (maybe there is,
> but I don't know).
> 
> > me_quality=6
> 
> -me_method full
> "full" is 6. See line 374 of libavcodec/libxvid.c.
>
http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavcodec/libxvid.c;h=dae8a
> c82442b48167ccef36182881e7a59f30aa6;hb=HEAD
> 
> > quant_type=mpeg
> 
> -mpeg_quant
> 
> > trellis
> 
> -trellis
> 
> > interlacing
> 
> I don't think ffmpeg support interlacing.
> 
> > chroma_me
> 
> -cmp chroma
> 
> > chroma_opt
> 
> ffmpeg might not support the option.
> 
> > vhq=4
> 
> -mbd 2
> 
> >
> > Additional questions are:
> >
> > Where should I look for the syntax of these parameters?
> 
> You should always go to http://ffmpeg.org/ffmpeg-codecs.html for
> codec-related param.

My word, that's a useful link, thanks! I'd never found it so went digging
again.

I discovered what seems to be a problem with the ffmpeg.org homepage. It
gives links for 'documentation' and 'Documentation' - I'd always just gone
to the first. It turns out they link to different places. The page linked to
by 'Documentation' contains a WEALTH of new information, including the link
you sent :-).

> 
> >
> > Exists a rule to deduce the commandline like e.g. "if you have a=b in
> > mencoder, then the ffmpeg-commandline is X=Y" or "look in the xvid
> > sourcefile bla.h, get the name of the xvid parameter there and write x=y
> > in the ffmpeg-commandline."?
> 
> You can look at libavcodec/libxvid.c in ffmpeg and libmpcodecs/ve_xvid4.c,
> and compare the opts, but trust me, you'd rather read the docs.
> 
> >
> > the question in general behind this is: How to transport parameters to
> > an external encoding lib (like e.g. x264, although this part seems to be
> > way better documented.)
> 
> AFAIK, you can only read documentation (or read C source files, which is
> harder for me).
> 
> >
> >> You can set up a ffmpeg preset to avoid the mess to type in every
> >> params every time. http://ffmpeg.org/ffmpeg.html#Preset-files-1
> >
> > Thanks for this useful hint!
> >
> > Regards
> > --
> > Felix
> >
> >
> > _______________________________________________
> > ffmpeg-user mailing list
> > ffmpeg-user at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> 
> Timothy
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