[MEncoder-users] Help with mencoder

[Jonathan Busby]

I should have mentioned that I was speaking in the context of the OPs desire
to combine several video files with headers that might also
have disparate frame rates and resolutions into an AVI container, not video
in general. In the case of mencoder, and at least flash video,
every video file must have the same colorspace, frame-rate and resolution in
order to perform a stream-copy/re-mux. Also, the last time I checked
this was the *Mencoder* mailing list.

Jonathan

On Sun, Mar 6, 2011 at 4:57 PM, Andrew Berg <bahamutzero8825 at gmail.com>wrote:

> On 2011.03.06 04:11 PM, Jonathan Busby wrote:
> > You can't use the text based "cat" command to combine structured binary
> > video files -- it just doesn't work that way.
> Not entirely true. Some simple containers (e.g. MPEG-PS IIRC) can be
> concatenated in such a way and still produce usable video files.
> > You have to re-encode (transcode) your source videos into a new video.
> Absolutely false. I don't know if MEncoder can do it, but videos with
> the same codec, profile and resolution (I think variable frame rate in
> this context is practical with Matroska and possibly a couple other
> containers) can be combined and muxed into a new container. A special
> program may or may not be necessary.
>
> mencoder Zachar*.flv -o Zach_all.avi -forceidx -ovc copy -oac pcm
> may work fine. However, I am not familiar with flash containers (and I
> don't know enough about AVI to know if -forceidx is a good idea or not), so
> I can't help much more.
>
>
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