[MEncoder-users] RM to FLV file bloat - huge upsize

[David Smith]

 So how do I read the bitrate of the RM file going in so that I do not
unintentionally upsize the bitrate and create an unnecessarily large .flv
result?  I will say, however, that some of the other RMs I've converted had
high bit rates to begin with, but still resulted in extra-large flvs.
Thanks.


>
>
>
> ---------- Forwarded message ----------
> From: RC <cooleyr at gmail.com>
> To: MEncoder usage discussions <mencoder-users at mplayerhq.hu>
> Date: Fri, 27 Jun 2008 12:55:12 -0700
> Subject: Re: [MEncoder-users] RM to FLV file bloat - huge upsize when
> converting
> On Fri, 27 Jun 2008 13:03:04 -0400
> "David Smith" <dcsmith2 at gmail.com> wrote:
>
> > How come the Flash file becomes so huge after converting the
> > RealMedia? The video and audio quality are just fine but the file
> > bloat is crazy, like 3-8x's the size of the original.
>
> If you tell mencoder to encode with a bitrate that is 3-8x's than that
> of the original, you will get files that are that much bigger as well.
>
>
>
>
> ---------- Forwarded message ----------
> From: Reimar Döffinger <Reimar.Doeffinger at stud.uni-karlsruhe.de>
> To: MEncoder usage discussions <mencoder-users at mplayerhq.hu>
> Date: Sat, 28 Jun 2008 11:45:54 +0200
> Subject: Re: [MEncoder-users] RM to FLV file bloat - huge upsize when
> converting
> Hello,
> On Fri, Jun 27, 2008 at 01:03:04PM -0400, David Smith wrote:
> > Even an 18Kb test file gets blown up to 94Kb.  I have attached the output
> > for that particular conversion, as it is very representative of the
> larger
> > files I'm working with.
> >
> > This is my argument string:
> > -of lavf -oac mp3lame -lameopts abr:br=56 -srate 22050 -ovc lavc
> -lavcopts
> > vcodec=flv:vbitrate=300:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -vf
> > scale=320:240
>
> [...]
> > Video stream:  226.209 kbit/s  (28276 B/s)  size: 75403 bytes  2.667 secs
>  30 frames
> >
> > Audio stream:   52.088 kbit/s  (6510 B/s)  size: 20750 bytes  3.187 secs
>
> Well, and the file is still ca. 25% _smaller_ than the size _you_ told
> mencoder to create.
>
> Greetings,
> Reimar Döffinger
>
>
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