[DEVS ONLY] Nexus 4 camera recording v0.2 (AVC high profile & LEVEL 4) (60FPS)

AdamUpNorth · Feb 21, 2013

Question....

In doing research on the differences between AVC medium and high profiles, it appears that HP is preferred because of higher bitrates (max 25 vs 20), better compression ratios and better algorithms (i.e. stuff don't understand like 8×8 vs. 4×4 transform adaptivity and Quantization scaling matrices).

Having little experience in comparing MP and HP my question is should we expect a significant increase in video quality by switching to HP on the N4?

Shaky156 · Feb 21, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4) (kernel)

Use this media profile
http://db.tt/gmKTXiqQ

Should be accessible just copy it over anndddd give it a test
Ive done some more work so there may be an update sometime...

Sent from my Nexus 4 using Tapatalk 2

Shaky156 · Feb 21, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4) (kernel)

AdamUpNorth said:
Question....

In doing research on the differences between AVC medium and high profiles, it appears that HP is preferred because of higher bitrates (max 25 vs 20), better compression ratios and better algorithms (i.e. stuff don't understand like 8×8 vs. 4×4 transform adaptivity and Quantization scaling matrices).

Having little experience in comparing MP and HP my question is should we expect a significant increase in video quality by switching to HP on the N4?

It will make a difference noticeable to the eye

Sent from my Nexus 4 using Tapatalk 2

Pheno.menon · Feb 21, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

Is it possible to improve picture quality on the camera? I'm not very happy with mine.

Transmission sent from my badass Nexus 4.

cguru · Feb 21, 2013

Any chances, we get in touch with the source?

wtfshouldidonow · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

And can instant HDR pictures be achieved anytime soon?

Sent from my Nexus 4 using xda premium

Crisisx1 · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

60 fps no way

Sent from my Nexus 4 using xda app-developers app

KCRic · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

AdamUpNorth said:
Question....

In doing research on the differences between AVC medium and high profiles, it appears that HP is preferred because of higher bitrates (max 25 vs 20), better compression ratios and better algorithms (i.e. stuff don't understand like 8×8 vs. 4×4 transform adaptivity and Quantization scaling matrices).

Having little experience in comparing MP and HP my question is should we expect a significant increase in video quality by switching to HP on the N4?

Not sure about some of it but I can tell you that the higher bit rate helps with limiting the grainy video you see at times. 25Mbps is really about all you need at 1080p, any higher only makes for large files but no better quality.

60fps? Negative. Honestly we can all get into a long debate over it but I'll save you the trouble - its dumb. No need for it in video. This isn't a high action game. Even the cinema standard is 24fps. Besides our hardware caps at 30. Just like most other phones. Drop to 30 again - the software drops frames anyway so you'd need to record Bruce Lee fighting to test and see if we can hit 60fps at all.

The source would be great since the media encoding is embedded in the kernel it seems. Not in the .apk like the "old" days. Maybe see if we can get the audio sampling up to 192 or 320, instead of the lackluster 96 (seriously Google, wtf...)

Lastly, there should be options for the FFC. What can we for for that?

Sent from my Nexus 4 using xda app-developers app

Logi_Ca1 · Feb 22, 2013

KCRic said:
Not sure about some of it but I can tell you that the higher bit rate helps with limiting the grainy video you see at times. 25Mbps is really about all you need at 1080p, any higher only makes for large files but no better quality.

60fps? Negative. Honestly we can all get into a long debate over it but I'll save you the trouble - its dumb. No need for it in video. This isn't a high action game. Even the cinema standard is 24fps. Besides our hardware caps at 30. Just like most other phones. Drop to 30 again - the software drops frames anyway so you'd need to record Bruce Lee fighting to test and see if we can hit 60fps at all.

The source would be great since the media encoding is embedded in the kernel it seems. Not in the .apk like the "old" days. Maybe see if we can get the audio sampling up to 192 or 320, instead of the lackluster 96 (seriously Google, wtf...)

Lastly, there should be options for the FFC. What can we for for that?

Sent from my Nexus 4 using xda app-developers app

60fps is a matter of opinion. Personally I deinterlace all my 30i media to 60p, and it looks great. 24fps (or rather, 23.976fps) in cinema is just a matter of tradition, rather than any technical superiority. We might see this trend changing soon with The Hobbit being recorded at 48fps.

Anyway, the Padfone 2 with the same APQ8064 is capable of 720p at 60fps, so unless the hardware limitation you are talking about is with the camera module, the hardware encoder in the APQ8064 should be capable of 720p 60fps recording.

ChongoDroid · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

Agreed^^

60fps works be very handy on a phone.. since I'm not recording a feature length film lol

Sports, action, tons of stuff could benefit.

Hell 60fps slow motion would be bad ass!

Sent from my Nexus 4 using Tapatalk 2

header2k · Feb 22, 2013

Logi_Ca1 said:
60fps is a matter of opinion. Personally I deinterlace all my 30i media to 60p, and it looks great. 24fps (or rather, 23.976fps) in cinema is just a matter of tradition, rather than any technical superiority. We might see this trend changing soon with The Hobbit being recorded at 48fps.

Anyway, the Padfone 2 with the same APQ8064 is capable of 720p at 60fps, so unless the hardware limitation you are talking about is with the camera module, the hardware encoder in the APQ8064 should be capable of 720p 60fps recording.

The xiaomi mi2 can record 720p 90fps and it has the apq8064. The camera module may not be capable of more fps, the processor is good enough. But I didn't find anything about it in the internet.

Shaky156 · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

At work so Ill sit back and patiently wait for you guys final decision, until then v0.2 is on hold

Sent from my Nexus 4 using Tapatalk 2

IAmAN00bie · Feb 22, 2013

720p video @ 60fps would be amazing. That plus higher bitrates and AVC high profile would finally make the video recording worthwhile. I sincerely hope you figure this out, OP!

Girn · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

HDR video HDR video HDR video. I would give you money if you got that working

Sent from my Nexus 4 using xda premium

eRajesh · Feb 22, 2013

So umm is AVC High profile Level 4 confirmed? What is the current bitrate? 1080p@60FPS might be too much, but 720p@60FPS is possible.

Besides, we should look into improving the image and video quality instead of just bumping the FPS.

calyxim · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

KCRic said:
60fps? Negative. Honestly we can all get into a long debate over it but I'll save you the trouble - its dumb. No need for it in video.

So the phones should not be designed to shoot your nephew's football match.
I'll tell him to play chess then. Less blurry memories...

End of sarcasm time.

You Sir are as dumb as Sarah Palin. If not more.
Should your kind disappeared, no one would have ever noticed it.

Vangelis13 · Feb 22, 2013

Re: Nexus 4 camera recording(AVC high profile & LEVEL 4 achieved!) (60FPS tests)

^^ Why attack other members like that, no need for it. Just disagree with an argument, makes you cooler..

cguru · Feb 22, 2013

do we have a baseline/highline nexus4 video encoding example?

Shaky156 · Feb 22, 2013

Pheno.menon said:
Is it possible to improve picture quality on the camera? I'm not very happy with mine.

Transmission sent from my badass Nexus 4.

I think yes but I'm not promising anything

cguru said:
Any chances, we get in touch with the source?

yes very soon I hope as soon as I finish the 60fps and few other things, thing is I've hacked it to the point even if you choose another level or profile it wont change only the high profile level 4 is selected need to work on it abit more

wtfshouldidonow said:
And can instant HDR pictures be achieved anytime soon?

Sent from my Nexus 4 using xda premium

Very interesting question something I'll need to look into in my spare time

Crisisx1 said:
60 fps no way

Sent from my Nexus 4 using xda app-developers app

Yes way! lol

KCRic said:
Not sure about some of it but I can tell you that the higher bit rate helps with limiting the grainy video you see at times. 25Mbps is really about all you need at 1080p, any higher only makes for large files but no better quality.

60fps? Negative. Honestly we can all get into a long debate over it but I'll save you the trouble - its dumb. No need for it in video. This isn't a high action game. Even the cinema standard is 24fps. Besides our hardware caps at 30. Just like most other phones. Drop to 30 again - the software drops frames anyway so you'd need to record Bruce Lee fighting to test and see if we can hit 60fps at all.

The source would be great since the media encoding is embedded in the kernel it seems. Not in the .apk like the "old" days. Maybe see if we can get the audio sampling up to 192 or 320, instead of the lackluster 96 (seriously Google, wtf...)

Lastly, there should be options for the FFC. What can we for for that?

Sent from my Nexus 4 using xda app-developers app

Dont worry you'll be able to limit the fps or atleast I'm hoping to do that so if its not your kinda thing then you can stick to your 30fps

Logi_Ca1 said:
60fps is a matter of opinion. Personally I deinterlace all my 30i media to 60p, and it looks great. 24fps (or rather, 23.976fps) in cinema is just a matter of tradition, rather than any technical superiority. We might see this trend changing soon with The Hobbit being recorded at 48fps.

Anyway, the Padfone 2 with the same APQ8064 is capable of 720p at 60fps, so unless the hardware limitation you are talking about is with the camera module, the hardware encoder in the APQ8064 should be capable of 720p 60fps recording.

Thank you for the info

IAmAN00bie said:
720p video @ 60fps would be amazing. That plus higher bitrates and AVC high profile would finally make the video recording worthwhile. I sincerely hope you figure this out, OP!

Wait for v0.2

Girn said:
HDR video HDR video HDR video. I would give you money if you got that working

Sent from my Nexus 4 using xda premium

Ive been thinking about that feature if i had full net access on my computer i wouldve already done a custom build, i have already done custom binarys built but didnt release that was months ago lkl

SuperStyle · Feb 22, 2013

Can you please make a zip for that kernel ?

[DEVS ONLY] Nexus 4 camera recording v0.2 (AVC high profile & LEVEL 4) (60FPS)

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