Hi,

I have some MPEG4 video files I'd like to make much smaller by using the older MPEG1 video (also so that older computers and even dos can play them), but I also want to make the files smaller (so they can be uploaded without taking many megabytes of space). But the problem I'm having is I cannot get mencoder to produce any sort of valid mpeg1 or mpeg2 video file!

Here's the command line I came up with to convert mpeg4 to a low "internet-quality" mpeg1 fiormat;


The files produced by this play ok in mencoder, trouble is they don't play back in anything *but* mplayer! I tried the file made by this on a win2k machine and it rejected the file, giving no video and thinking it's an mp3 file!

Update:
This seemed to encode it properly to mpeg1 video, but the sound still only works in mplayer and not on anything else :-(

Can anyone see what I've missed out at all?

Thanks

SP[

Get mencode version 1.07pre??

Look into these options as well
-mpegopts format=dvd -vf scale=256:192,harddup

This will be mpeg2, quite standard
mpeg1 video codec might work with these option, and -lavcopts vcodec=mpeg2video

I'm using version 1.0pre7-3.4.3 .... thanks for the info, I tried this to start off with (adding the -mpegopts) ;

(was hoping to keep it mpeg1 for now, but if it won't work .... x.x )

But it still produces an *invalid* mpeg1 file - mplayer played it, avidemux opened it but claimed there was no sound (but it still worked). A windows PC rejected the file immediately.

Could it be that it's impossible to make mpeg1 on linux?

SP

Have never tried mpeg1,

see for avi to mpeg2 dvd compliant example I posted
http://www.linuxquestions.org/questi...hreadid=360138

If this works for you, then it should be easy to change vcodec=mpeg2video
to 1, (some other tweaks may be needed). If I were you, I would start from there.

I am not sure, but I do not think mp3 is compliant with the mpeg1 container

Thanks for that, I'll give that a try and see what happens,

SP