FFmpeg: Linux KVCD Status (So Far)

japie · #1 09-01-2003, 01:18 PM

Hai all,

Still no true kvcd, but creating xvcd works fine.
Up to two hours on one 800Mb. disk with acceptable quality.
find the script at http://japie.is.dreaming.org/ftp/KVCD and give it a try.
Youll need at least mplayer-0.9.x and mjpegtools-1.6.1 for this.

True kvcd is coming, since the mjpegtools had the kvcd notch matrix build-in in mpeg2enc, in the Beta folder there's a script to do the job but it's very slow and the output size is to large.
Youll need at least mplayer-0.9.x and mjpegtools-1.6.1.90 for this.

Second step is doing the same with ffmpeg instead of mpeg2enc, not because mpeg2enc isn't good, it's compareable to tmpgenc in quality and speed but ffmpeg is THE FASTEST THING AROUND!
4x faster than tmpgenc and even 2x faster than commercial encoders, open-source rules!
So if you have some knowledge to let ffmpeg create vbr and preferably use the kvcd matrix, please hop in.

vmesquita · #2 09-01-2003, 02:18 PM

Japie,

This is great news! I've read somewhere that people are thinking about making avisynth "Visual C++"-independant, maybe then we'll be able to have full KVCDs on Unix!

PS: Great idea this forum

[]'s
Vmesquita

kwag · #3 09-01-2003, 02:31 PM

AviSynth should be moving to Python in the future: http://www.avisynth.org/index.php?page=WhyPython
This will bring us platform independance, and easier coding, flexibility and maintenance than C++

-kwag

japie · #4 09-01-2003, 04:25 PM

Quote:

Originally Posted by vmesquita

PS: Great idea this forum

Honour Kwag

Quote:

Originally Posted by kwag

AviSynth should be moving to Python in the future: http://www.avisynth.org/index.php?page=WhyPython

That sounds great!
In the future avisynth (virtualdub 4 *nix)
http://fixounet.free.fr/avidemux/
will have frameserver output, now the only thiny thing to solve is creating a real kvcd mpeg stream

kwag · #5 09-01-2003, 05:12 PM

Quote:

Originally Posted by japie

now the only thiny thing to solve is creating a real kvcd mpeg stream

Isn't that already true, with the latest version of mpeg2enc

-kwag

japie · #6 09-01-2003, 10:57 PM

Quote:

Originally Posted by kwag

Quote:

Originally Posted by japie

now the only thiny thing to solve is creating a real kvcd mpeg stream

Isn't that already true, with the latest version of mpeg2enc

Yes and no...
I have some problems with the filesize, I did:
max bitrate 2500, video buffer 40, both min. and max. gop sizes to 24 (25 gives an error) and the quantisation scale to 10 (this can be a value between 2 and 31 controling the bitrate in a way I don't understand.)
I will do some testing to determine what value to use to get the same size as tmpgenc, after that I'll look at the quality to see how it can be improved.

kwag · #7 09-01-2003, 11:05 PM

Quote:

Originally Posted by japie

and the quantisation scale to 10 (this can be a value between 2 and 31 controling the bitrate in a way I don't understand.)

I think that's where the trick is

This value must be changed, just like we change the CQ in TMPEG.
If that's the way it works, then I might eventually fire up my dev. system, and port CQMatic to OS X

Then we can do prediction, just like we do in the Windoze world

-kwag

japie · #8 09-02-2003, 09:59 AM

Quote:

Originally Posted by kwag

This value must be changed, just like we change the CQ in TMPEG.
If that's the way it works, then I might eventually fire up my dev. system, and port CQMatic to OS X

Please make it platform independend

Or preferably script based with a (platform depented) frontend so it can be used in a automated script chain.

Razorblade2000 · #9 09-03-2003, 05:26 PM

btw:
is there a nice GUI? (like ffmpegx... a lil bit jealous)

and:
how did your tests end kwag?

kwag · #10 09-03-2003, 10:07 PM

Quote:

Originally Posted by Razorblade2000

how did your tests end kwag?

I haven't done the CQ test yet.
I got all tangled up in the new portal design

But I did install ffmpegX 0.0.8a (the latest version) on my iBook, and I was happy as a pig to see all the "KVCD" presets

(thanks major

)

-kwag

japie · #11 09-04-2003, 02:07 AM

Quote:

Originally Posted by kwag

I haven't done the CQ test yet.
I got all tangled up in the new portal design

Wich looks great, it looks more clean than the old design (wich looked good too do).
Never heard off miniPortail it seems that thare's more than yust phpNuke.

p.s.:
(If you want to run some CQ tests, I found a good testmovie at:
http://download.divx.com/showcase/HomeWorld1024.avi)

kwag · #12 09-04-2003, 03:19 AM

I'll take a look

Thanks japie.

-kwag

el_mozo · #13 09-06-2003, 07:34 PM

There is a new script for creating kvcd, check this thread to get some info about the kvcd status, and this message for the script.

I just did a few tests and it looks like it's working fine, the resulting file fits on a CD (the script auto adjusts the bitrate), and the quality is pretty good.

Cheers

japie · #14 10-25-2003, 10:16 AM

New mkxvcd version; 2.0

Major changes and complete rewrite of the script.
Backing up your dvd's is supported now via transcode.
Check it out: http://kvcd4nix.sourceforge.net/

Razorblade2000 · #15 10-25-2003, 10:58 AM

ohhhh... looks nice

japie · #16 10-25-2003, 11:38 AM

wait till 3.x and ffmpeg is fully implemented

kwag · #17 10-25-2003, 12:01 PM

What can I say:

-kwag

buildid · #18 11-11-2003, 05:19 AM

so the new scipt is still xvcd ?

i like the gui ( mjpegx) like to see it working

buildid · #19 11-22-2003, 06:58 AM

iam using the script and converting goes well and fast , but with a 100 minute movie i always end up with 2 mpg files , one is 809 and the other is 179 mb . should i change someting into the script ?

i did with and without black borders .

japie · #20 11-27-2003, 10:45 AM

Quote:

Originally Posted by buildid

iam using the script and converting goes well and fast , but with a 100 minute movie i always end up with 2 mpg files , one is 809 and the other is 179 mb . should i change someting into the script ?

Can you give me a bugreport via email with mkxvcd-version and the info file?