[MEncoder-users] what video output to select for mencoder when encoding dvd's to h.264

[Cristian Manea]

Yes, 720x540 is 4:3, not 16:9 like I said previously by mistake. I knew that
vobs store aspect ratio, just like mkv, but I didn't knew that mencoder
doesn't use -vo wich I learned now that it is mplayer only. But I assumed it
uses -vo because there's this message that mencoder outputs: "The selected
video_out device is incompatible with this codec", wich probably means that
I should force other codec than default, for decoding...

On Mon, Sep 26, 2011 at 1:28 AM, The Wanderer <wanderer at fastmail.fm> wrote:

> On 09/25/2011 04:54 PM, Cristian Manea wrote:
>
>  There is something that I don't understand about MEncoder. By default,
>> MEncoder and MPlayer both use xv as video output. But, for example, when I
>> open a dvd title or vob file in MPlayer, it scales it to a 16:9
>> resolution:
>>
>
> According to my understanding (which could be inaccurate), that's because
> something - possibly the file itself - asked for a 16:9 aspect ratio, even
> though the actual video data was encoded with a different aspect ratio.
>
>
>  Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
>>> VO: [xv] 720x480 => 720x540 Planar YV12
>>>
>>
> I don't see a 16:9 aspect ratio in there. 720x480 is 3:2, and 720x540 is
> 4:3.
>
>
>  So, my first question is: do I have to use a different video output that
>> xv
>> when encoding DVD's/mpeg2 streams to H.264 using MEncoder with x264 ?
>> Maybe a
>> video output that doesn't scale 720x480 to 720x540 and leave all frames
>> unscaled ?
>>
>
> This question doesn't make any sense.
>
> MPlayer decodes and displays the video. To do the display, it uses a VO
> method.
>
> MEncoder decodes and encodes the video, without displaying anything but the
> console-window text. Because it doesn't display the video, it doesn't need
> to
> use a VO method, and doesn't. (Or I'd be exceedingly surprised to learn
> that it
> did.)
>
> --
>      The Wanderer
>
> Warning: Simply because I argue an issue does not mean I agree with any
> side of it.
>
> Secrecy is the beginning of tyranny.
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