Re: [MEncoder-users] How to choose quality for FMP4

On Wed, Apr 9, 2008 at 3:04 PM, RC <cooleyr@gmail.com> wrote:
> On Wed, 9 Apr 2008 00:02:07 -0300
> "Jorge Peixoto de Morais Neto" <please.no.spam.here@gmail.com> wrote:
>
> > vbitrate is only good with two-pass, unfeasible with TV capture.
>
> 1-pass vbitrate can do just fine. Set vratetol, or vqcomp to something
> sane.
Thank you very much for the tip, RC! According to my testing, for
average bitrates 1-pass vbitrate can be less than 4% less efficient
than 2-pass. I am now using the options
tv=norm=PAL-M:chanlist=us-cable

tv=channels=4-SBT,5-Vanguarda,7-Record,13-Band,15-TVEscola,17-RedeVida,19-CancaoNova,21-MTV,24-RioSul,26-Futura,28-RecordNews,30-ShopTime,32-GazetaEsportiva,34-EdNacional,36-EdNacional2,38-TVBrasil,40-RedeTV,42-Gazeta

tv=alsa=yes:audiorate=32000

oac=copy=yes
ovc=lavc=yes
vf=crop=624:464:0,pp=lb,denoise3d
lavcopts=vmax_b_frames=1:vratetol=100000:mbd=2:v4mv=yes:vbitrate=2048

for deinterlaced capturing and

oac=copy=yes
ovc=lavc=yes
vf=crop=624:464:0
lavcopts=ildct=yes:ilme=yes:vmax_b_frames=1:vratetol=100000:mbd=2:v4mv=yes:vbitrate=2048

for interlaced capturing.
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