CoreCodec/H.264 Codec "CoreAVC"

[robpdotcom]

Wow, I assumed everyone preferred to only have forced subs load automatically.... guess I was wrong.

[Shevek]

Originally Posted by robpdotcom

Wow, I assumed everyone preferred to only have forced subs load automatically.... guess I was wrong.

Isn't that the point of the default flag?

if a subs stream is set to default it will display automatically.

if no subs stream is set to default none will display automatically.

That's what I do with my Studio Ghibli rips.

default audio is English, 2nd audio is Japanese, single English subs with default flag off.

That way, when the children watch it they get the English audio and no subs, but when I watch it I switch audio to Japanese and switch the subs on.

At least that's my experience using VLC.

[Pat357]

Originally Posted by CruNcher

yep normaly Mainconcept does excellent work but the VC-1 Decoder is far from that and it's funny seeing Cyberlink and Arcsoft beating it but i guess Mainconcept doesn't invest much resources into it's Developing

What's the name of the Cyberlink VC-1 decoder (filter name on the disk).
I have PDVD9 installed (came with my system), but can't find the VC-1 decoding filter.

[kerman]

Does anyone get dxva on AMD cards activated? I have an HD6950 with latest CCC 12.1 and win7x64. I have checked dxva on properties, but tray icon is always on blue.

Any ideas?

[DeadlyEmbrace]

Originally Posted by kerman

Does anyone get dxva on AMD cards activated? I have an HD6950 with latest CCC 12.1 and win7x64. I have checked dxva on properties, but tray icon is always on blue.

Any ideas?

Are you using a DXVA supported renderer? (EVR or EVR-CP)?
Also, if I remember correctly you cannot have a subtitle filter (directVobSub or such) running between the DXVA decoder and the renderer.

[kerman]

Originally Posted by DeadlyEmbrace

Are you using a DXVA supported renderer? (EVR or EVR-CP)?
Also, if I remember correctly you cannot have a subtitle filter (directVobSub or such) running between the DXVA decoder and the renderer.

Yes, madVR. No subtitle filter, I just switch subtitloes on/off with splitter.

[namaiki]

Originally Posted by kerman

Yes, madVR. No subtitle filter, I just switch subtitloes on/off with splitter.

madVR doesn't support DXVA for video decoding. Only DXVA deinterlace.

[kerman]

I thought it was the coreavc the only one involved on decoding and hw acceleration used for it. Then the render filter just renders the result, inherent to how the decoder does his specific task.

BTW, is it much of use in quality terms the choice for a specific render for 1:1 video displaying? I mean, 1080p content on 1080p display.

[ajp_anton]

With DXVA, everything happens on the GPU. The renderer must support the transfer of decoded video within the GPU, instead of the "normal" way to send the decoded video *to* the GPU for rendering.

1:1 is only 1:1 for the luma pixels. For 99.9% of all video you watch, the chroma resolution is half (or 1/4th by area), so it needs to be upscaled.

[kerman]

Originally Posted by ajp_anton

1:1 is only 1:1 for the luma pixels. For 99.9% of all video you watch, the chroma resolution is half (or 1/4th by area), so it needs to be upscaled.

On untouched Bluray video, chroma is half resolution too?

madVR may not support DXVA... but it does CUDA? with nvidia gpu, coreavc does enable CUDA hardware acceleration with madVR.

[DeadlyEmbrace]

Yes, MadVR does work with CUDA. As far as I understand it CUDA copies the processed frames back to system RAM where the renderer can get at them, kinda like the LAV DXVA Copy Back option.

[BetaBoy]

Originally Posted by BetaBoy

CruNcher.. got it... fixed, thx.

I spoke too soon... we are looking into this some more.

[dead_screem]

I know you commented already, but you didn't really affirm the previously mentioned "Feburary" release as per twitter... So is 3.1 still on track for a Feburary release? or has the moving target moved over to March?

And what is the status on CoreAAC? I know you got CoreAVC 4:4:4 and 4:2:2 on your plate as well as CoreMVC, But there is a pretty bad channel order bug I mentioned to you before (and you passed it on to the team I guess), that makes CoreAAC completely unusable for anything but 2 channel stereo, even mono is screwed up.
We can't even use an external 5.1>2.0 downmix because CoreAAC is not using the correct internal channel order and thus the channels are output wrong. And Mono is not output correctly as 1 channel, it's output as 2 channel Stereo but with audio in only 1 channel.

[Dark Shikari]

Originally Posted by betaking

Microsoft>Cyberlink>Arcsoft>Mainconcept!

Where does libavcodec fit on that list?

[CruNcher]

Originally Posted by BetaBoy

I spoke too soon... we are looking into this some more.

yep this is a little crazy especially the complete different handling of different decoder splitter combinations, though Kytmanov with his ffmpeg or libav based AV Splitter handles it well with CoreAVC

Originally Posted by Dark Shikari

Where does libavcodec fit on that list?

I guess he doesn't see it up to the state of the commercial implementations because of the missing interlaced handling part how is the status of that btw for libavcodec now ?

[nevcairiel]

Originally Posted by Dark Shikari

Where does libavcodec fit on that list?

libavcodecs VC-1 decoder is not really up to par. It lacks proper interlaced support and is generally slow.

If those two things would be fixed, it would probably be OK, so that means finishing interlaced decoding, and adding multi-threading for the speed issues.

[CruNcher]

and maybe trying to find a way to fix this old http://www.mediafire.com/?lh785fl24aukxja Microsoft Encoder bug (or old feature implementation) that would make it unique as everyone else has failed yet on it (only Microsofts Decoder copes with it) most probably because they only look @ the official specs

[Midzuki]

Originally Posted by Dark Shikari

Where does libavcodec fit on that list?

Faster than Mainconcept's decoder anyway.

[NikosD]

I've finished my benchmark survey.

All platforms included (ATI, Nvidia, Intel) and the main decoders:

Microsoft DirectShow,
Microsoft MediaFoundation,
LAV Video all modes (NVCUVID, QuickSync decoder, DXVA2 Copy-back, DXVA2 Native),
CoreAVC (NVCUVID, DXVA2),
FFDShow QuickSync decoder.

Results here:
http://forum.doom9.org/showthread.php?t=163110

[CruNcher]

This is only 1 Side of the Medal though as i explained in the Benchmark thread