Any altivec experts? (H.264 codec)

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tommysammy

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/22 3:10 #81

Quite a regular

@feanor
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Hans

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/22 7:34 #82

Home away from home

@feanor
Quote:

What is the expected outcome and what would make people accept such a challenge as solved?

Eg. pick a video stream (bigbuckbunny?) and a base hardware spec and expect that to work with no frames dropped?

Picking criteria is going to be difficult. While I'd certainly love it if the Prometheus trailer could play without framedropping on my A1-X1000, I estimate that this would require a 33% performance improvement (from 18 to 24 fps). However, given that the H.264 code already has partial altivec acceleration, I don't know if that's realistic.

If we had benchmark results for x86, ARM, & PPC giving the performance difference between SIMD and non-SIMD, then we might be able to guess how much extra performance we could get.

Hans

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LiveForIt

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/22 20:32 #83

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@Hans

I think It be good idea to compare mplayer VC benchmark speed, compare altivec vs none altvec, and do the same on PC hardware using SSE/MMX, find out the potential speed increase.

Mplayer film.avi -vo null -ao null -nosound -benchmark

(NutsAboutAmiga)

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Raziel

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/23 15:49 #84

Home away from home

@LiveForIt

I hope i got the right Prometheus trailer...

X1000 here

Quote:

mplayer -vo null -ao null -nosound -benchmark "Prometheus - Official Trailer [TRUE HD].mp4"
MPlayer UNKNOWN-4.4.3 (C) 2000-2010 MPlayer Team
160 audio & 349 video codecs

Playing Prometheus - Official Trailer [TRUE HD].mp4.
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO: [H264] 1280x544 24bpp 23.976 fps 1140.9 kbps (139.3 kbyte/s)
Clip info:
major_brand: mp42
minor_version: 0
compatible_brands: isommp42
track: 1
comment: www.dvdvideosoft.com
title: Prometheus - Official Trailer [TRUE HD]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Audio: no sound
Starting playback...
Movie-Aspect is 2.35:1 - prescaling to correct movie aspect.
VO: [null] 1280x544 => 1280x544 Planar YV12

generic
MPlayer 1.0 (11.11.2010)
© MPlayer Team, Nicolas Det, Fabien Coeurjoly [SVN: r32620]

BENCHMARKs: VC: 35.523s VO: 0.005s A: 0.000s Sys: 1.437s = 36.965s
BENCHMARK%: VC: 96.0990% VO: 0.0126% A: 0.0000% Sys: 3.8885% = 100.0000%

altivec
MPlayer 1.0 (11.11.2010)
© MPlayer Team, Nicolas Det, Fabien Coeurjoly [SVN: r32620]

BENCHMARKs: VC: 20.066s VO: 0.005s A: 0.000s Sys: 1.351s = 21.422s
BENCHMARK%: VC: 93.6680% VO: 0.0241% A: 0.0000% Sys: 6.3078% = 100.0000%

mplayer-noaltivec (Liveforit)
MPlayer for AmigaOS4 SVN-rSVN-r32634-4.2.4

BENCHMARKs: VC: 25.168s VO: 0.007s A: 0.000s Sys: 0.181s = 25.355s
BENCHMARK%: VC: 99.2606% VO: 0.0275% A: 0.0000% Sys: 0.7120% = 100.0000%

mplayer-noaltivec (Liveforit)
MPlayer for AmigaOS4 SVN-rSVN-r32634-4.2.4

BENCHMARKs: VC: 17.955s VO: 0.007s A: 0.000s Sys: 0.176s = 18.138s
BENCHMARK%: VC: 98.9937% VO: 0.0368% A: 0.0000% Sys: 0.9695% = 100.0000%

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Severin

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/24 14:35 #85

Just can't stay away

Quote:

VIDEO: [H264] 1280x544 24bpp 23.976 fps 1140.9 kbps (139.3 kbyte/s)

No. the one we test is 1920x1080, 1080p, yours is 720p.

Try this one: prometheus-trailer.zip

My results are here.

Amiga user since 1985
AOS4, A-EON, IBrowse & Alinea Betatester

Ps. I hate the new amigans website. <shudder>

Severin

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/24 14:59 #86

Just can't stay away

@Raziel

results for your file using the "official" command line:

> mplayer -nosound -benchmark "Prometheus - Official Trailer [TRUE HD].mp4"
LiveForIt-MPlayer-6.3 SVN-r37230-snapshot-1.1.1 (C) 2000-2014 MPlayer Team

Playing Prometheus - Official Trailer [TRUE HD].mp4.
libavformat version 55.33.100 (internal)
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO: [H264] 1280x544 24bpp 23.976 fps 1140.9 kbps (139.3 kbyte/s)
Clip info:
major_brand: mp42
minor_version: 0
compatible_brands: isommp42
creation_time: 2014-03-07 13:54:00

---8<-----------------------------------

BENCHMARKs: VC: 27.349s VO: 2.594s A: 0.000s Sys: 1.286s = 31.228s
BENCHMARK%: VC: 87.5760% VO: 8.3062% A: 0.0000% Sys: 4.1178% = 100.0000%

Internal COMP YUV FPS 54

-fs gives 55 fps

Amiga user since 1985
AOS4, A-EON, IBrowse & Alinea Betatester

Ps. I hate the new amigans website. <shudder>

Raziel

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/24 16:01 #87

Home away from home

@Severin

BENCHMARKs: VC: 92.689s VO: 66.982s A: 0.000s Sys: 0.534s = 160.205s
BENCHMARK%: VC: 57.8565% VO: 41.8104% A: 0.0000% Sys: 0.3331% = 100.0000%

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Hans

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/24 20:09 #88

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@Raziel

Thanks for the benchmarks. What we need now are similar benchmarks for X86/ARM machines using mplayer versions both with and without SIMD (and without HW decoding). I'm not even sure if such builds are available, so we might need someone who understands their build system to create custom versions.

Hans

Join Kea Campus' Amiga Corner and support Amiga content creation
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LiveForIt

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/24 22:21 #89

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@Severin

In this context benchmarking with video output (VO) don't make sense, other operating systems like Linux do not have the same Video outputs as we do. And this is about optimizing video codec decoding (VC), the CPU usage on Video Output effects the VC score.

(NutsAboutAmiga)

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Severin

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 1:17 #90

Just can't stay away

@Liveforit

Ok, I was just trying to keep benchmarks consistant until told to use something else...


> mplayer -vo null -ao null -nosound -benchmark "Prometheus - Trailer.mp4" 

LiveForIt-MPlayer-6.3 SVN-r37230-snapshot-1.1.1 (C) 2000-2014 MPlayer Team



VIDEO:  [H264]  1920x816  24bpp  23.976 fps  6828.3 kbps (833.5 kbyte/s)



BENCHMARKs: VC: 81.3130s VO:  0.0070s A:  0.0000s Sys:  0.8820s =  82.2020s

BENCHMARK%: VC: 98.9190% VO:  0.0085% A:  0.0000% Sys:  1.0725% = 100.0000%

Amiga user since 1985
AOS4, A-EON, IBrowse & Alinea Betatester

Ps. I hate the new amigans website. <shudder>

Raziel

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 9:15 #91

Home away from home

@Severin

Quote:

mplayer-altivec -vo null -ao null -nosound -benchmark "Prometheus - Trailer.mp4"

MPlayer LiveForIt V5.1 - SVN-rSVN-r32634-4.2.4(C) 2000-2010 MPlayer Team

BENCHMARKs: VC: 59.675s VO: 0.007s A: 0.000s Sys: 3.239s = 62.921s
BENCHMARK%: VC: 94.8415% VO: 0.0113% A: 0.0000% Sys: 5.1472% = 100.0000%

Seems i'm usiing the wrong mplayer version?

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ddni

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 15:02 #92

Just can't stay away

@Raziel

Me too. 5.1 when everyone else use 6.3?

AmigaOne X1000.
Radeon RX550

http://www.tinylife.org.uk/

Severin

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 16:46 #93

Just can't stay away

@Raziel & ddni

Something is wrong with 6.3 (not released yet btw) as 5.1 is decoding 25% faster.

Although it could just be using a newer version of the mplayer/ffmpeg base code and the associated bloat.

Edited by Severin on 2014/11/25 18:53:26

Amiga user since 1985
AOS4, A-EON, IBrowse & Alinea Betatester

Ps. I hate the new amigans website. <shudder>

ddni

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 19:01 #94

Just can't stay away

Ok thanks.

Holding off on CANDI, RADEONHD2 etc till Radiance and FE are available. Better be out by chrimbo or my stocking will be very empty!

AmigaOne X1000.
Radeon RX550

http://www.tinylife.org.uk/

Hans

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 20:46 #95

Home away from home

@Severin

Quote:

Something is wrong with 6.3 (not released yet btw) as 5.1 is decoding 25% faster.

Maybe the loop filter is disabled by the default config in 5.1, but enabled in 6.3?

You could try changing your mplayer config file to disable the loopfilter (remove the # in front of skiploopfilter=all), and test again.

Hans

Join Kea Campus' Amiga Corner and support Amiga content creation
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Severin

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/25 22:20 #96

Just can't stay away

@Hans

Yes, that was it:


BENCHMARKs: VC: 66.0390s VO: 0.0070s A: 0.0000s Sys: 1.8150s =  67.8610s

BENCHMARK%: VC: 97.3156% VO: 0.0103% A: 0.0000% Sys: 2.6741% = 100.0000%

Displaying the video I get 22fps, video and sound fullscreen gives 21fps, not far off the 23.976 but as most are 25 or 30 fps it's still got quite a way to go.

Amiga user since 1985
AOS4, A-EON, IBrowse & Alinea Betatester

Ps. I hate the new amigans website. <shudder>

Hans

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/26 0:40 #97

Home away from home

@all

Okay, do we have anyone who is able to create the custom mplayer builds to benchmark x86/ARM machines with and without SIMD enabled (and without HW acceleration)? We really need to be able to compare the AmigaOS altivec performance increase against what a fully SIMD-optimized platform achieves.

Hans

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feanor

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/26 8:13 #98

Just popping in

@all

Ok, I took a close look the past days at the ffmpeg codebase, basically the altivec and arm(neon) trees. My first impression was that the altivec port was seriously lacking as there were far fewer files. However, a closer look showed that the functions were implemented but inside the .c files, and not separately as happens with the neon port. Still, not all were implemented, in particular I could not find altivec code for the ff_pred16x16_vert_* type of functions (found in libavcodec/arm/h264pred_init_arm.c). So these would be the ones I would tackle first.

I suggest to allocate ~35 hours initially for this task alone, and take a look at it again -note that it might not mean an actual week, as I am already working on a day job. Since you asked me for a public quote, my rate usually is 30EUR/hour, but as I promised and since working on Altivec is a pleasure, I'm willing to do a discount, at 23EUR/hour (if invoicing within the EU, VAT will be deducted, and I would have to invoice someone for that amount). So, in total 805EUR.

So, what do you guys think?

corto

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/26 8:58 #99

Not too shy to talk

If the wasted processing time is in the decoder, I suggest that we avoid the mplayer layer, using ffmpeg only instead. With mplayer, we see that we will have to take care about the version, the operating systems and their versions, etc.
It will also be easier to compare on x86 and ARM, building ffmpeg for them with and without SIMD.

Let's choose:
- an ffmpeg revision
- 3 videos (the 1080p prometheus being the first one) to check different parts of the code are exercized
- 2 or 3 pieces of hardware

trixie

Re: Any altivec experts? (H.264 codec)

Posted on: 2014/11/26 9:40 #100

Amigans Defender

@feanor

Quote:

So, in total 805EUR. So, what do you guys think?

The community was able to raise a similar amount in order to buy a computer for a guy who never produced anything meaningful on it, so I guess the amount is doable.

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