Adaptive DCT and aud

[Chengbin]

What does Adaptive DCT and aud do? Should I turn it on? Does it make the output video high profile?

[Dark Shikari]

Originally Posted by Chengbin

Should I turn it on?

yes.

Originally Posted by Chengbin

Does it make the output video high profile?

yes.

[Chengbin]

Thank you for the quick response, I edited my question to include the setting aud.

BTW, is there any way to improve the quality of the output video in this setting without making it high profile? BTW this is the setting used to encode anime. BTW, should I turn on psy rd for movies like Wall-E or Kung Fu Panda?

<?xml version="1.0"?>
<VideoProfile xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<Name>2 pass Balanced</Name>
<EncodingMode>4</EncodingMode>
<BitrateQuantizer>1000</BitrateQuantizer>
<KeyframeInterval>1000</KeyframeInterval>
<NbBframes>4</NbBframes>
<MinQuantizer>10</MinQuantizer>
<MaxQuantizer>51</MaxQuantizer>
<Turbo>true</Turbo>
<NoDCTDecimate>false</NoDCTDecimate>
<PSNRCalculation>false</PSNRCalculation>
<noFastPSkip>false</noFastPSkip>
<NoiseReduction>0</NoiseReduction>
<MixedRefs>true</MixedRefs>
<X264Trellis>2</X264Trellis>
<NbRefFrames>6</NbRefFrames>
<AlphaDeblock>-1</AlphaDeblock>
<BetaDeblock>-1</BetaDeblock>
<SubPelRefinement>9</SubPelRefinement>
<MaxQuantDelta>4</MaxQuantDelta>
<TempQuantBlur>0</TempQuantBlur>
<BframePredictionMode>3</BframePredictionMode>
<VBVBufferSize>14000</VBVBufferSize>
<VBVMaxBitrate>25000</VBVMaxBitrate>
<METype>tesa</METype>
<MERange>32</MERange>
<MinGOPSize>25</MinGOPSize>
<Level>4.1</Level>
<IPFactor>1.4</IPFactor>
<PBFactor>1.3</PBFactor>
<ChromaQPOffset>0</ChromaQPOffset>
<VBVInitialBuffer>0.9</VBVInitialBuffer>
<BitrateVariance>1.0</BitrateVariance>
<QuantCompression>0.6</QuantCompression>
<TempComplexityBlur>20</TempComplexityBlur>
<TempQuanBlurCC>0.5</TempQuanBlurCC>
<SCDSensitivity>40</SCDSensitivity>
<BframeBias>0</BframeBias>
<Deblock>true</Deblock>
<Cabac>true</Cabac>
<WeightedBPrediction>true</WeightedBPrediction>
<AdaptiveBFrames>2</AdaptiveBFrames>
<BFramePyramid>true</BFramePyramid>
<ChromaME>true</ChromaME>
<P8x8mv>true</P8x8mv>
<B8x8mv>true</B8x8mv>
<I4x4mv>false</I4x4mv>
<I8x8mv>true</I8x8mv>
<P4x4mv>false</P4x4mv>
<AdaptiveDCT>false</AdaptiveDCT>
<SSIMCalculation>false</SSIMCalculation>
<Interlaced>false</Interlaced>
<Width>false</Width>
<Sar>false</Sar>
<aud>false</aud>
<nal-hrd>false</nal-hrd>
<pulldown>0</pulldown>
<aq-mode>1</aq-mode>
<aq-strength>1</aq-strength>
<deadzone-inter>false</deadzone-inter>
<deadzone-intra>false</deadzone-intra>
<pre-scenecut>false</pre-scenecut>
<psy-rd>false</psy-rd>
<fpel-cmp>false</fpel-cmp>
<me-prepass>false</me-prepass>
<extra1>false</extra1>
<QuantizerMatrixType>0</QuantizerMatrixType>

[Dark Shikari]

Originally Posted by Chengbin

<I4x4mv>false</I4x4mv>

[Chengbin]

Originally Posted by Dark Shikari

Clarify please. Thanks.

[Sagekilla]

i4x4 partition is helpful. That's why he's surprised you have it off.

[Esurnir]

aud is useless unless your aiming to make it a bd9/avc-hd (which you don't seeing the profile)

Since I see you got TESA on. Here are some hints.

<Name>2 pass Placebo</Name>
<NbBframes>16</NbBframes>
<Turbo>false</Turbo>
<noFastPSkip>true</noFastPSkip>
<NbRefFrames>16</NbRefFrames>
<VBVBufferSize></VBVBufferSize> (note : are you trying to make it dxva compatible ?)
<VBVMaxBitrate></VBVMaxBitrate>
<METype>tesa</METype>
<MERange>32</MERange>
<I4x4mv>true</I4x4mv>
<I8x8mv>false</I8x8mv> (you want main profile)
<P4x4mv>true</P4x4mv>
<psy-rd>true</psy-rd>(note : maybe the correct syntax is 1:0, I don't know your gui)

With this profile, your grandchild will enjoy maybe the greatest quality x264 can offer

(the bold part are the only serious suggestion, all others increase the quality a ridicule ammount, save maybe the turbo for the first pass, but I haven't been able to really witness the effect of a good first pass)

[Chengbin]

I'm encoding this for my Archos 5, which doesn't support 16 b and ref frames. It only supports 4 b frame and 6 ref frame (it might support more, but I think those numbers are safe). I'm using AutoMKV.

I thought it is not a good idea to enable psy-rd for anime.

How much improvement in quality do I get with turbo off?

[Esurnir]

Originally Posted by Chengbin

I'm encoding this for my Archos 5, which doesn't support 16 b and ref frames. It only supports 4 b frame and 6 ref frame (it might support more, but I think those numbers are safe)

I thought it is not a good idea to enable psy-rd for anime.

Psy-RD is a bad idea

Psy-RD is a good idea

CG and 3d animation work fine with psy-rd.

[Dark Shikari]

Originally Posted by Esurnir

Psy-RD is a bad idea

Psy-RD is a good idea

CG and 3d animation work fine with psy-rd.

I've found psy-rd works fine on anime at higher bitrates, especially when you're trying to avoid banding in flat areas.

[Chengbin]

Define higher bitrates.

I'm encoding at around 300-500Kbps for anime. 1000Kbps for movies.

Should I reencode all my movies and anime for the I4x4 improvement? I have lots of time. Does I4x4 provide a noticeable improvement with low bitrates like what I'm using?

EDIT: You know what, I'm gonna reencode all my videos again since I have nothing better to do with my computer (except for F@H). I didn't buy a quad core for nothing. I'm gonna turn off turbo do everything right this time.

[Dark Shikari]

i4x4 provides an enormous benefit... I can't imagine why anyone would turn it off...

[Esurnir]

Originally Posted by Chengbin

Define higher bitrates.

I'm encoding at around 300-500Kbps for anime. 1000Kbps for movies.

Should I reencode all my movies and anime for the I4x4 improvement? I have lots of time. Does I4x4 provide a noticeable improvement with low bitrates like what I'm using?

EDIT: You know what, I'm gonna reencode all my videos again since I have nothing better to do with my computer (except for F@H). I didn't buy a quad core for nothing. I'm gonna turn off turbo do everything right this time.

If you don't really want a set size, maybe you should encode your files using CRF. (also called constant quality).

You use one pass, you don't know what's the resulting file size but you know the quality.

Personaly I never had anyone make me any remark (more like "wow blu-ray are indeed high quality") from a crf 20 encode.

P.S. Keep the vbv settings since you encode for a device.

[Chengbin]

I'm using 2 pass because I want to hit a specific size. I have too many videos and too little space on my Archos 5 250GB.

[Chengbin]

Originally Posted by Dark Shikari

i4x4 provides an enormous benefit... I can't imagine why anyone would turn it off...

No wonder you were "scared"

[Chengbin]

Turning turbo off doesn't seem to make encoding slower???

[Esurnir]

Originally Posted by Chengbin

Turning turbo off doesn't seem to make encoding slower???

Turbo really depends on the gui, in megui turbo means that the first pass will use the settings of the second pass. for other software your mileage will vary.

[Chengbin]

Originally Posted by Esurnir

Turbo really depends on the gui, in megui turbo means that the first pass will use the settings of the second pass. for other software your mileage will vary.

I'm using AutoMKV.

[Sharktooth]

Originally Posted by Esurnir

Turbo really depends on the gui, in megui turbo means that the first pass will use the settings of the second pass. for other software your mileage will vary.

nope... turbo in megui lowers the settings of the first pass to a level they will speed up the encoding but wont hit the quality in a noticeable way.

[Esurnir]

Originally Posted by Sharktooth

nope... turbo in megui lowers the settings of the first pass to a level they will speed up the encoding but wont hit the quality in a noticeable way.

Sorry for the screwup. It is indeed the opposite of what I said.