[MPlayer-users] lossless codecs make bigger files than raw DV ?!
Andrzej M. Ostruszka
krasnal at 2-0.pl
Tue Feb 3 21:37:10 CET 2004
On Tue, Feb 03 (2004), Louis-David Mitterrand wrote:
> I am trying to encode DV (from dvgrab) capture files to a lossless
> video/audio format for storage. What is the best format?
>
> I have tried to encode to huffyuv but the resulting file is MUCH larger
> than the source file:
>
> mencoder -oac lavc -ovc lavc -lavcopts vcodec=huffyuv:format=422P:acodec=mp3 file.dv2 -o file.huffyuv
>
> file.dv2 is 1.4G and file.huffyuv is around 3.8G. How come?
FWIW, I often encode DV to mpeg4 (it would take too many CD to store all
my movies recorded since I bought a camera). I'm very cautious to not
loose quality (at least not to the extent that would be easily noticable
on 1024x768 screen) and I'm able to get about 14:1 compression (on
average).
Typical parameters:
audio -> encoded with mp3lame with abr and br=64 (64 it's enough for me
- the sound recorded by the camcoder is not of top quality)
video -> lavc with vcodec=mpeg4:vhq:vbitrate=2000:vpass=1/2 -vop pp=lb
Sometimes I add hqdn3d and twiddle its parameters - especially
if the recording was done in a dark place cause somehow this
camcoder (Sony) is not able to handle it well -> the picture is
noisy. In such cases it often happens that the encoded picture
is of better quality than the original (and is still about 14
times smaller :)).
Just my two grosze (polish cent :)).
Best regards
Andrzej
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