[MEncoder-users] Why Mencoder's mpeg output can not be

[Guillaume POIRIER]

Hi,

On 11/19/06, Giacomo Comes <comes at naic.edu> wrote:
> On Sat, Nov 18, 2006 at 01:12:20PM -0800, DD DD wrote:
> > Is there any way that we can encode a video to a (avi / mpeg / wmv) format
> > on linux that will play on a freshly installed windows XP box? (without
> > needing to install ffdshow, etc). It works when ffdshow is installed, but
> > was hoping for a more 'supported' codec.
> >
> > I tried the options given in documentation (and this email thread), and they
> > don't seem to work :(.
>
> Is it possible to make an mpeg using only mencoder that will play
> on a freshly installed windows XP box, but the correct command line is not documented anywere.
>
> The mpeg video has to be an mpeg1 video. The mplayer documentation has examples
> on how to make VCD mpeg with mencoder, but unfortunately such mpeg wont play
> with the windows player without installing some extra software/codec.
>
> The reason is that the mplayer's mpeg muxer does not mux to a standard VCD format,
> but to a XVCD. In the past the solution was to remux audio and video
> with mplex. After the remuxing you are able to play the mpeg with fresh windows.
>
> Since the introduction of the libavformat muxer it is now possible to create
> the requested mpeg using only mencoder.
>
> Example command line:
>
> mencoder -of lavf -lavfopts format=mpg:i_certify_that_my_video_stream_does_not_use_b_frames -ovc lavc -lavcopts vcodec=mpeg1video:vrc_buf_size=327:keyint=15:vrc_maxrate=1152:vbitrate=1152:vmax_b_frames=0 -o VCD.mpg -ofps 25 -vf scale=352:288,harddup -oac lavc -lavcopts acodec=mp2:abitrate=224 sourcevideo.ext
>
> The parameters vrc_buf_size, keyint, vrc_maxrate and vbitrate
> in the example have typical VCD values, but the software player
> can deal with much bigger values. The resolution also can be
> as big as the DVD resolution.
>
> Guillaiume, you may want to add such command line in the documentation
> because this is a recurring question.

Good, I'll add it in a flush.

Guillaume

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