22 minute TV episode - 344MB after compressed, can I do better?

[flitcher]

Im trying to compress some TV episodes on DVD, its Family Guy, so its animated. I've tried all sorts of different matrices that are built into DVD2SVCD, and the best I can do is 344MB. While the quality is so-so, during some fast parts or when there are a lot of characters on the screen you begin to see a ton of blocks. I would have thought a 22 minute show could be compressed a lot more than 344MB and with better quality than I am getting.

Does anyone have any recommendations? My goal would be to fit 2 dvd's onto 1 after compressing all the episodes, which would mean each episode would need to be around 300MB, but I of course would like good quality or atleast better than what I currently have.

[telemike]

What settings are you using? 480x480 SVCD, 352x480 VCD, 352x240 VCD? Bitrates? What is your source?

I use the D2Sroba plugin with DVD2SVCD, using 1-pass OPV, my dvd backups look spectacular.

[DDogg]

So I assume that is interlaced source from a capture? What encoder? Give us the proper information and we might be able to help.

[flitcher]

Thanks.. Here is some information:

They are being encoded as an SVCD, however, I'm not sure of the video size because I cant seem to play them on my computer but they play fine in my standalone DVD player. I'm guessing 480x480?

Encoder is TMPGEnc:
Constant bit rate
motion search: highest quality

Bit rate:
Max: 2450
Min: 300
Max and min avg are not active

Source is a DVD.

Audio bitrate: 192

Matrices i've tried: TMPGEnc 2.51 standard, CCE 2.62 MPEG standard, Angel SVCD 1CD and Andrews SVCD matrix

[telemike]

IF you are using Constant Bit Rate....stop....try using CQ mode with TMPGenc and DVD2SVCD program.

If you did use Constant Bit Rate, the max and min make no sense since it encodes at one bitrate. FOr SVCD that would be around 2200 and you would have awesome picture but only 35 minutes on a CD-R

[flitcher]

But what do I do to get better picture quality then?

[telemike]

Using CQ mode with TMPGenc (cay a CQ-80) Min bitrate = 300, max bitrate = 2200. 480 x 480 MPEG2 SVCD.

TMPGenc will use lower bitrates for slow motion and higher bitrates for fast motion. You should not have any blocks.

CQ mode stands for Constant Quality. SO it will vary the bitrate from 300 to 2200 to keep the quality at "80". TMPGenc CQ range is 1-100 with anything over 90 being a waste sinceit approaches CBR. A CQ between 60 and 90 is optimal.

:cool:

[jsoto]

I competely agree with telemike: Use CQ mode, but just to add some information: CQ mode has only a problem which is the size estimation. DS2 does the best possible calculation, but not always the final size is the expected one.

---------------Extracted from an old post------------------
Other parameter which is very speed sensitive is Motion Search precision (at least in CQ mode). I have these measurements done with the same 1 minute clips
CLIP A
Normal: 2:33
High: 3:33
Highest: 6:05

CLIP B
Normal: 3:22
High: 4:57
Highest: 8:59

(CQ=70 resolution 720x576, in both cases)
IMHO, quality is similar between High and Highest, but as you can see the encoding time is not.

Hope it helps

jsoto

[flitcher]

Thanks! It reduced file size to 264MB and its about equal to when it was 344MB. Question though. What matrice would you recommend? Or is there a custom one I should add to it?

[DDogg]

Kwag's Notch matrix works well and I think it was designed with tmpg in mind. Also, the one I call Bach1 is very good in CCE and perhaps TMPG.


[Bach1 Matrix]
Intra=8,16,19,22,26,27,29,34,16,16,22,24,27,29,34,37,19,22,26,27,29,34,34,38,22,22,26,27,29,34,37,40,22,26,27,29,32,35,40,48,26,27,29,32,35,40,48,58,26,27,29,34,38,46,56,69,27,29,35,38,46,56,69,83

NonIntra=16,18,20,22,24,26,28,30,18,20,22,24,26,28,30,32,20,22,24,26,28,30,32,34,22,24,26,30,32,32,34,36,24,26,28,32,34,34,36,38,26,28,30,32,34,36,38,40,28,30,32,34,36,38,42,42,30,32,34,36,38,40,42,44

[KVCD-Notch by Kwag]
Intra=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,12,14,18,27,29,34,37,12,14,18,27,29,34,37,38,22,26,27,31,36,37,38,40,26,27,29,36,39,38,40,48,27,29,34,37,37,40,48,58,29,34,37,38,40,48,58,69,34,37,38,40,48,58,69,79

NonIntra=16,18,20,22,24,26,28,30,18,20,22,24,26,28,30,32,20,22,24,26,28,30,32,34,22,24,26, 30,32,32,34,36,24,26,28,32,34,34,36,38,26,28,30,32,34,36,38,40,28,30,32,34,36,38,42,42,30,32,34,36,38,40,42,44

[flitcher]

Are KVCD's compliant on standalone DVD players? I'll give these matrices a try, thanks!

[telemike]

KVCD notch matrix has nothing todo with compliance, it is encoder specific.

A KVCD disc is compatible with most players. A KVCD disc is specified as a non-standard VCD. MPEG-1 compression using varible bit rate, a GOP of 24 instead of 15, 24 fps instead of 30 fps. This allows about 90-120 minutes of decent quality on a single disc.

For specifics check out www.kvcd.net

[DDogg]

Are KVCD's compliant on standalone DVD players? KVCD's are compliant with nothing as they are a melding of several standards. They are however compatible with some/many players.

[flitcher]

One more quick question... I did a search and could not find anything too relevant.

How can I recompress an SVCD file? I want to take the SVCD source and compress it (by I assume lowering bitrate) and make the output smaller than before.

[telemike]

You could open TMPGenc and use the existing file as your source and re-encode it. However, the quality will be bad. Much like copying cassette to cassette. degradation. :(