Re: [gentoo-user] Re: converting any video to mpeg-1, mpeg-4 or DivX-5

[Ognjen Bezanov]

Iain Buchanan wrote:

>Success!  Partially at least (skip to the bottom if you want to know
>how!)
>
>On Thu, 2005-12-15 at 15:02 +0000, James wrote:
>
>
>>Iain Buchanan <iaindb <at> netspace.net.au> writes:
>>
>>
>>
>>>Space it not too much of an issue
>>>
>>>
>>Disc space is a relative thing. It always get's filled up. Human nature.
>>You will never have enough disk space for adults is like
>>candy for children, never, ever enough.
>>
>>
>
>good point - same with memory, processor speed, etc.  As soon as you
>have more, something more intensive comes out to use it...
>
>
>
>>>So, here are my questions:
>>>1. whats the best format to use out of the ones listed, given
>>>
>>>
>>Well you first have to realize that 'mpeg 4' is like saying
>>I want a car.
>>
>>
>[snip]
>
>wow.  After reading your post, I realise it's much more complicated that
>I first thought...
>
>
>
>>Use H.264 until theora matures.
>>
>>
>
>Unfortunately, with the comments from you and Uwe, I don't think H.264
>will be suitable.  Firstly, I doubt my little low powered video device
>will decode it, secondly I doubt I can encode it properly on linux, as
>good as it sounds.
>
>I think I will be happy with something simpler, even though it may be a
>lower quality (that's the human subjective perception of the quality of
>course :)  I guess it's like when people ask me for a recommendation on
>purchasing computers.  They want to buy the cheap sub-$1000 all in one
>deals, and I say "stay away, you're better off in the long run going for
>something more expensive, with a better quality, longer life, etc".
>However, sometimes they purchase their sub-$1000 PC's and they're
>perfectly happy, because they don't use it like I do, and they haven't
>had the experience with higher quality.
>
>
>
>>HTH,
>>
>>
>
>absolutely!
>
>---------------------------------------------------------------
>
>So, this is what I've come up with so far (for those following the
>thread).  Simply:
>
>ffmpeg -i test.wmv -b 4000 -s 640x480 -an test.mp4
>
>(It's the filename .mp4 that did it! note the -an produces no audio)
>
>$ file test.mp4
>test.mp4: ISO Media, MPEG v4 system, version 1
>
>however:
>$ ls -alh test*
>-rw-r--r--  1 iain users 8.5M 2005-12-16 09:18 test.mp4
>-rw-------  1 iain users 1.8M 2005-12-15 21:51 test.wmv
>
>as you can see, thats ~4x the size of the original... and thats without
>sound.  That's not so good...
>
>Well, I still have a bit to go, but at least I know I can put
>_something_ on the device!  If anyone is interested, I can keep posting
>back here with my results.
>
>PS, can someone give me an example of how to encode divx with mencoder
>or ffmpeg?  Or any program on linux for that matter?
>
>thanks!
>
>
On My site I wrote about DVD 2-Pass encoding to xvid (hope its close 
enough to divx for you, you can do divx as well, but I am not sure how) 
, Basically this command provides xvid encoding:

/mencoder dvd://1 -sws 2  -nosound -ovc xvid -xvidencopts bitrate=580 -o 
./video.avi

I presume you probably will need to state the input file rather then 
dvd://1
/

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