CQMs a no-no for Mediatek-standalones (xvid 1.1beta2 +cvs)?

[NaN]

Hi!

Currently I'm trying to use custom quantization matrices - especially sharptooths v3hr, v3uhr, Dideé's 6of9 - for a 2.8MBit/s encode (full DVD-resolution). The main point is that it should work perfectly on my Mediatek-standalone; unfortunatly only the mpeg and h263-matrices work perfectly.

The others produce heavy blocking (especially for the sky), coloured artefacts (wooden bords becoming greenish-blue); this behaviour is there for 6of9 and v3hr and worsens for v3uhr.

I read len0x post about problems with cqms and tried his suggested xvid-cvs build from 10.4.05 without success.

Since I read a thread about a success using cqms with mediatek driven players that dated from early last year, there must be something wrong.

Any hints?

Thanks for your reply, NaN

PS: I'm using trellis, qpel (as@l5, as@l4).

PPS: does the vbv control video only, or is it aware of audio streams too?

[bond]

Originally posted by NaN
The main point is that it should work perfectly on my Mediatek-standalonewhere did you read that?

[Sharktooth]

WARNING: It may not work with some standalones
Not a xvid problem. Standalones usually dont support matrices with inter matrix starting with 15 or lower values...
If you want you can modify V3HR replacing all "15"s with "16"s (in the inter matrix only!).
For UHR there's no hope... :)

Originally posted by NaN
PPS: does the vbv control video only, or is it aware of audio streams too?
Video only.

[CruNcher]

if your refer to my tests i did 1 year ago i only tested the HVS matrixes by RefDivX and they all worked fine @ that time :/ and as Sharktooth said inter matrixes with values of 15 or lower wont work @ all anyways.

[NaN]

Yep I was referring to Cruncher's tests quite some time ago. Thanks for your tip, Sharptooth! I changed the values, it seems to be slightly better, but overall nothing changed :-( At least HVS-best shows no blocking, but has the same colour artifacts though to a much lesser extent.

Any suggestions for high-bitrate matrices that should work on Mediateks?

Is it possible that the latest chipsets have really that much troubles?

Cheers! Thanks for your ideas, NaN

PS: where can I find ReferenceDivx's matrices?

[Sharktooth]

High bitrate matrices wont work coz they tend to have lower coefficients...
ReferenceDivx matrices are hvs-good, hvs-better and hvs-best... just use search to find them.

[Didée]

Standalones ... :rolleyes:


"How much must I cripple the codec to make my SA handle the encodings?"

and

"Will my custom-crippled encodes play on the *next* SA I'll own?" (Probably: NO!)


Option X is *necessary* for player A, but *forbidden* for player B ... the powerful features are mostly forbidden anyways ... and so on.


What I'm wondering is - are the manufacturers just taking the customers for a ride, or _are_ they that incompetent.

DivX certification ... LOL & CRY.

[NaN]

Sorry for my late response and thanks for your replies!

@Cruncher: thanks for your tip, I simply didn't get it that the hvs-matrices are ReferenceDivx's work! I will try them asap.

@Sharktooth: sorry to bother you, but as far as I know are the latest mediateks the most powerfull mpeg4-chipsets, so do you know of chipsets that handle your matrices well?

@Didée: standalones and mpeg4 cabability is a tough topic, just as you say. Just that I wouldn't say that the future has to be even worse (will the next sa play your encodes? Probably no), the mediatek plays qpel and packed bitstream (altough not that great with 2 audio tracks and subtitles, switching is flawed then). I haven't tested B-frames yet, but one shouldn't be a problem. I cannot imagine that future chipsets play less.

Cheers and have a nice weekend, NaN

[Sharktooth]

Originally posted by NaN
@Sharktooth: sorry to bother you, but as far as I know are the latest mediateks the most powerfull mpeg4-chipsets, so do you know of chipsets that handle your matrices well?
A modded xbox!:D
Ok, seriosly, when i made my matrices i didnt care about standalones since at that time there were only few that could decode streams made with custom matrices.
Thats why divx certification includes only h.263...

[Shinigami-Sama]

Originally posted by Didée
Standalones ... :rolleyes:

DivX certification ... LOL & CRY.
agreed on both parts I use my "SA" to play stuff and to see my "SA" lookit my sig

as for divx certs you'll se I can handle everyting and if I need ot every use my livingroom dv a simple latop with tv out attacked to a stereo will work just fine and PP styles ot help out :rolleyes: