[MEncoder-users] vqscale or vbitrate for autoselecting a quality?

[Guillaume POIRIER]

Hi,

On 2/22/07, Joe Emenaker <joe at emenaker.com> wrote:

[..]

> Anyway, where I'm stuck is in having the script auto-choose a reasonable
> bitrate given the resolution, framerate, color-depth, and user's desired
> quality. Just setting the vqscale (for the lavc codec, anyway) strikes
> me as a way of getting a consistent quality regardless of other factors
> like resolution and color-depth... but, from what I can tell, it
> sacrifices the ability to devote more bits to high-motion scenes and,
> hence, negates any benefits of multi-pass encoding.
>
> On the other hand, trying to set the bitrate seems fraught with peril,
> as most of the posts I see here scoff at the notion of selecting bitrate
> based upon bits-per-sec but, frankly, that's all I have to go on.
>
> I'm open to suggestions....

My advice still holds: doing a compression test (as described earlier)
should get you the best of both world (best quality at reasonable
bitrate/filesize).

Guillaume