[MEncoder-users] converting and subtitle questions

[Jorge Peixoto de Morais Neto]

On Wed, Mar 26, 2008 at 11:23 AM, Erik Slagter <erik at slagter.name> wrote:
> zechao wang wrote:
>  > Hello Erik Slagter:
>  >
>  > I want to convert rmvb files to mp4 for my cellphone.
>  >
>  > mencoder my.rmvb -ovc lavc -oac mp3lame -o my.avi
>  >
>  > ffmpeg -y -i my.avi -vcodec xvid -s 400x240 -r 29.97 -b 600 -acodec
>  > aac -ac 2 -ar 48000 -ab 128 -vol 200 -f mp4 my.mp4
>  >
>  > With above commands, it can works well. But the quality is not good,
>  > especially when playing the dark frames, there are too much mosaic.
>  >
>  > If you are familiar with ffmepg, how should i do if i want to get the
>  > high-quailty mp4 file ? Please give me some advice, thanks you very
>  > much.
>
>  Something like:
>
>  ffmpeg -i my.rmvb -vcodec libx264 -acodec aac -s 400x240 -r 29.97 -b 600
>
>  -ac 2 -ar 48000 -ab 128 -vol 200 -f mp4 my.mp4
>
>  Why do you need the extra pass with mencoder anyway?
>
>  This command is a for a "proper" (imho) mp4-implementation, using h264
>  (aka mpeg4-avc). If your phone cannot handle that, replace -vcodec
>  libx264 by -vcodec mpeg4, this will output mpeg-vc ("traditional
>  mpeg4"). [...]
I think it is much more common that a device supports "Divx" (meaning
MPEG-4 part 2 with certain restraints) than H.264.

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