On 07/11/2012 02:38 PM, Martin Storsjö wrote: > For enabling VBR, the general consensus seems to be to use the > qscale flag. There doesn't seem to be any consistent way to > indicate the actual desired quality though. Both libfaac and > libmp3lame calculate avctx->global_quality / FF_QP2LAMBDA and set > that as the libraries' VBR quality parameters, with wildly different > results. On libmp3lame, the VBR quality parameter is between 0 (best) > and 10 (worst), while the scale goes in the opposite direction for > libfaac, where higher quality values gives you better quality. > > Therefore, for now, I just pass the actual value of > avctx->global_quality through. You can set it to values between 1 > and 5: > 1 - about 32 kbps/channel > 2 - about 40 kbps/channel > 3 - about 48-56 kbps/channel > 4 - about 64 kbps/channel > 5 - about 80-96 kbps/channel > ---
Looks fine, just should we mark it non-free or not? lu -- Luca Barbato Gentoo/linux http://dev.gentoo.org/~lu_zero _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
