[MEncoder-users] Dolby downmix

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Dec 28 22:37:23 CET 2010


Rolf Ernst <rolf.ernst <at> silverlightning.org> writes:

> The reason that I like to downmix is that I generally keep TV episodes 
> in Dolby surround sound format (The balance of space/quality/experience 
> tilts in favor of space) whereas I like to keep movies at high audio 
> quality.

If I could just understand what you write here...
(Do you suggest that there may be a situation where you can get "high(er) audio
quality" by dropping channels? Sorry, I am not a native speaker...)

If ffmpeg -i yourrecording -qscale 5 -ab 256k -ac 2 out.avi doesn't work
(*except* for the not-disappearing telecine), I believe we are interested in the
sample. (ftp server in my previous mail and in your answer.)

Carl Eugen

PS: Note that as far as I follow the avfilter discussions on ffmpeg-devel,
nobody has yet lamented over the missing filmdint filter (and neither on
mencoder-users when I suggested using FFmpeg). So it is useful to mention the
need for this filter (and others) clearly!
(Don't misunderstand me: I know that inverse telecine is important, but I
believe many of the active developers live in PAL-country where it has nearly no
relevance.)



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