On Fri, 2 Jan 2004, Brian J. Murrell wrote:
> Indeed. I have seen some of your traffic on the ffmpeg-devel list.
Then you'll also have seen that the speed difference isn't as
great has been bandied about at times (well, at least for the
cvs version - RC4's delayed until mplex can get fixed for MPEG1
muxing)
> I know that by default mencoder does produce avi contained files (which
> I am trying with great effort to get the hell away from. However, it
It is a Pain isn't?
> has a switch "-of" which you can set to "mpeg", to get an mpeg container.
But you don't want a container. You want an ES stream not a PS
stream!
> > - they're already "muxed" and definitely not MPEG1 ES files and that
> > is why mplex can't recognize them.
>
> I don't think so. Mplayer tells me this about the file (if there is a
> better utility to determine the parameters of an MPEG file, I would be
> Mplayer seems to think it's an MPEG-PS stream, without audio even. I
And what did I say about PS vs ES a little bit earlier? :-) :-)
> No it's not. It's an MPEG file. It could be multiplexed already with a
True - but it's packetized into a ProgramStream
> Well, as we have discussed here before, I have no inherent issues with
> mpeg2enc other than it takes waaaaaay too long to encode. Granted it's
~20% speed difference for the encoding isn't all that much. Where
some more speedup happens is ffmpeg/mencoder's ability to do the
DV decoding internally rather than running thru a pipeline. On the
other hand I've found smil2yuv+y4mscaler to seemingly do a better
411 to 420 conversion.
> CPU bandwidth to spend 8 hours to convert 1 hour of video that I am only
> going to watch once and then delete.
Using the Video/TV-out on a video card? For that type of use
I would use MPEG-4. For computer playing that's the better/faster
format. MPEG-2 is for set top boxes. At least that's the guidline
that's been useful for myself.
> Actually, my ultimate target is MPEG2, but I thought I would play with
> mpeg1 first.
Going to write it to DVD or SVCD perhaps? If not then mencoder
to MPEG4 will do a great job. There are a couple set top boxes
that supposedly can handle MPEG4 but I haven't seen at the stores
I frequent.
Cheers,
Steven Schultz
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