maemo.org - Talk - N900 Video Recording

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maemo.org - Talk (https://talk.maemo.org/index.php)

- Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)

- - N900 Video Recording - Questions/Concerns (https://talk.maemo.org/showthread.php?t=35071)

mikec

2010-01-03 16:01

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by andree (Post 451254)

ISP (c64x) is (I think) used for encoding, that's why you don't see so big cpu usage...

the eMMC access time most probably isn't the problem - using usb transfer, I am able to fill it with speed ~10MiB/s... I can't believe the chipset could be able to encode 1280x720@30fps video realtime...

Apologies, the N900 processor is the OMAP 3430, not the 3530.

It should do DVD quality capture. 720x480 30fps NTSC, and 720x576 Pal 25fps. Perhaps the recording resolution of 800x480 is pushing the chipset past what it can handle. Anyway to drop the resolution with crafty dbus command?

andree

2010-01-03 17:02

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by mikec (Post 451296)

Perhaps the recording resolution of 800x480 is pushing the chipset past what it can handle. Anyway to drop the resolution with crafty dbus command?

yep, this is exactly what I was thinking - the frame dropping is caused by frame skipping (due to insufficient encoder speed)... I wouldn't bet you can change the video resolution thru DBUS (and for sure not after the recording begun) - but I'm quite confident that this feature will be either added in later firmware revisions, or someone will come up with 3rd party camera app (as the camera is controllable using V4L2 interface - and the gstreamer contains implementations of codecs (which are most probably used by the official cam app) ). I know I will, if nokia won't do anything for a few months... :)

dcell

2010-01-03 18:58

Re: N900 Video Recording - Questions/Concerns

i'm not quite into the chipset used in N900 but Samsung Omnia HD/i8910 is also using OMAP3430 (according to Wikipedia, though after some googling some sources say it uses 3440) and it can handle 720p videorecording so i cannot see why n900 can't handle 800x480.

Dr. Drips

2010-01-08 13:47

Re: N900 Video Recording - Questions/Concerns

So no one is really sure it's a hardware or software limitation?

aldevil

2010-01-08 14:14

Re: N900 Video Recording - Questions/Concerns

i got lost.... hope it gets fixed... Hear US NOKIA

woodyear99

2010-01-08 14:21

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by Dr. Drips (Post 459152)

So no one is really sure it's a hardware or software limitation?

Could it be both?

amoult

2010-01-14 13:34

Re: N900 Video Recording - Questions/Concerns

Could someone post sample video (with enough movement, like traffic going past the camera etc.) with new PR1.1 sw? Is frame dropping still as bad as it used to be?

Dr. Drips

2010-01-14 13:41

Re: N900 Video Recording - Questions/Concerns

One of the first thing I tested. The recordings have less framedrops. but they are not gone and the overal framerate is not 25 fps as I can see.
the audio sync is solid now.

I will post a video if I am home.

torpedo48

2010-01-14 14:22

Re: N900 Video Recording - Questions/Concerns

I've just recorded this sample test video with the "new" recording quality of the PR1.1 firmware update.
I've uploaded it to flickr.com, have a look here:

http://www.flickr.com/photos/46097117@N05/4274278158/

I'll upload it to some file hosting online service so that you can easily download it in the original recording quality.
My opinion? Nothing (or too few things) has been done in improving the quality of recording, there are still lots of frame drops.
Let me know what do you think about it.

EDIT: Here's the link for downloading the original recorded file:

http://www.4shared.com/file/19683762...00114_006.html

So, what do you think about this "new" quality?

woodyear99

2010-01-14 14:39

Re: N900 Video Recording - Questions/Concerns

It's too bad, was hoping I could use my N900 to take quick vids for youtube. Guess I will still have to walk around with my regular digicam...

mikec

2010-01-14 14:49

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by torpedo48 (Post 470897)

Where did you see any mention of "new" recording quality in the changelog?

Dr. Drips

2010-01-14 14:53

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by woodyear99 (Post 470960)

It's too bad, was hoping I could use my N900 to take quick vids for youtube. Guess I will still have to walk around with my regular digicam...

Yes indeed. I was a bit to quick with my judgement.
Very strange, my viewty did even better (although on a lower resolution).
It's a bit dissapointing.

torpedo48

2010-01-14 14:54

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by mikec (Post 470984)

Where did you see any mention of "new" recording quality in the changelog?

There's no mention of improvements made in recording in the changelog, I was referring to what Dr. Drips had said before my post (less frame drops, while they are still there).

Dr. Drips

2010-01-14 15:03

Re: N900 Video Recording - Questions/Concerns

Changelog states:
- Less CPU load caused during video recording
- Lower RAM consumption while capturing video
- AV sync fix for recorded videos

Not directly referring to the frame rate problem, but it's always good to have hope.

torpedo48

2010-01-14 15:09

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by Dr. Drips (Post 471015)

You are so right, everyone here hoped to see better quality (and no more frame drops) with this update :(

ddwalker

2010-01-26 01:11

Re: N900 Video Recording - Questions/Concerns

With the latest Maemo software (2.2009.51-1.002), I can still see dripped video frames when recording. Anyone else see this problem?

mrp	2010-01-26 17:58

Re: N900 Video Recording - Questions/Concerns

yes. practically unusable for me :(

woodyear99

2010-01-26 18:00

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by ddwalker (Post 494737)

With the latest Maemo software (2.2009.51-1.002), I can still see dripped video frames when recording. Anyone else see this problem?

It has been like this from day one, the firmware updates have not fixed it. I have seen some annoying frame drops as well, would not recommend the phone for decent video atm.

ddwalker

2010-01-26 19:38

Re: N900 Video Recording - Questions/Concerns

Is there a bug filed against this problem?

slender

2010-01-26 19:45

Re: N900 Video Recording - Questions/Concerns

http://www.google.fi/search?q=maemo+...ient=firefox-a

shanrizvi

2010-03-17 20:39

Re: N900 Video Recording - Questions/Concerns

I still see this problem! :( These frame drops suck. I am QUITE disappointed with Nokia after spending 500 euros on this device. I mean, I understand that it is "step 4 out of 5" and "work in progress" and all that but the price doesn't discount for these things, only the features do! THAT is the problem with this phone! This is so basic!

egoshin

2010-03-17 21:09

Re: N900 Video Recording - Questions/Concerns

Before recording video, go to X-Term and kill some big processes:

killall gst-video-thumbnailerd
kill `ps | grep mafw-gst-renderer | grep -v grep | cat -d ' ' -f2`

It looks like you have some videos in your N900 and tracker actively works on it. That consumes memory and other resources and it may be a cause of frame drop etc.

EDIT: don't run system media player before you start recording.

PR1.2 may fix it - it has some bug fixes related with video.

EDIT2: unfortunately, it is a price of multi-tasking and universal device, it is very easy to produce a stable recording in single task environment but it is a nightmare for multitasking.

maxximuscool

2010-03-17 21:23

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by egoshin (Post 571053)

Nightmare with 1GB of application memory? The problem is the software for the N900 camera is no where near polished. Take a look at the video recording for example. There is no pause option and if you look at the first Generation N-Series, the pause option exists there! The photo Camera is also the same, the autofocus is no where near perfect and No night mode or touch focus or any smile detection.

I think those apps are still only half bake at most but I don't know when will Nokia bringing the sexy back to their most famous camera capability device of all time. The OS is still so new and no where near stage 5 yet. And after MeeGo announced, the work on the N900 is getting more challenging. Nokia has 3 OSes to work on at the moment. Expecting delay in application fix is also necessary when dealing with bugs and maintaining the OS.

woodyear99

2010-03-17 21:39

Re: N900 Video Recording - Questions/Concerns

I have to admit while I love my N900 the frame drops in the video recording is a huge disappointment.

luckylefty

2010-03-17 22:24

Re: N900 Video Recording - Questions/Concerns

And why cant we turn on flash while in video recording mode

maxximuscool

2010-03-17 22:27

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by luckylefty (Post 571185)

And why cant we turn on flash while in video recording mode

For now just use Flashlight 2.0 or lfocus to turn on the flash while recording the video.

egoshin

2010-03-17 23:56

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by maxximuscool (Post 571081)

Nightmare with 1GB of application memory?

256MB. The rest is a swap space on internal flash memory (not very fast, BTW).

(I mostly agree with the rest but I like to say that Nokia is not Canon and can't beat it... at least now :)

amoult

2010-05-25 13:45

Re: N900 Video Recording - Questions/Concerns

So has anyone tested with PR1.2? Is the framedrop issue still there? I'm still waiting for PR1.2 update to appear on my device app manager.

Sample videos please.

maartenmk

2010-05-25 14:11

Re: N900 Video Recording - Questions/Concerns

For me it is actually worse with 1.2! Before I could get it to be almost smooth by overclocking and switching to offline mode, but not anymore.
That is a disappointment I must say. I do like the other changes 1.2 brings, but I was really hoping for improvement here.

Maybe it is specific to my situation though, did anyone else try yet?

woodyear99

2010-06-10 20:21

Re: N900 Video Recording - Questions/Concerns

I seem to have sorted out my dropped frames, bought a 4 gb class 6 microsd card and use that to save video. I guess it is due to file fragmentation with the onboard memory.

This one is working pretty good...

http://www.amazon.com/gp/product/B00...SIN=B0013DXVYK

maartenmk

2010-06-11 11:36

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by woodyear99 (Post 709399)

I seem to have sorted out my dropped frames, bought a 4 gb class 6 microsd card and use that to save video. I guess it is due to file fragmentation with the onboard memory.

[...]

Reformatting my class 2 card already helped. But it is not completely smooth. You don't have any dropped frames left?

I read somewhere that reducing the cluster size to 8 or even 4 would also help (for a different phone, but I believe the poster said it wasn't phone-specific).
I couldn't find out how to do that though.

The next question is how long it will stay smooth, I am not looking forward to reformatting or defragmenting on a regular basis....

woodyear99

2010-06-11 13:42

Re: N900 Video Recording - Questions/Concerns

Not seeing any so far, will report back after trying it out some more.

maxximuscool

2010-06-11 13:53

Re: N900 Video Recording - Questions/Concerns

video frame drop less if you use the eMMC instead of memory card, mine a class 6 but still laggy and skippy when recording. HELL! the n900 doesn't even have pause! so the best thing is to keep wasting precious Gigs of memory while recording without pausing it.

Camera SEEMS a little blurred and did not focus properly at times. This would be great if Nokia make the N900 autofocusing live while recording!!!

woodyear99

2010-06-11 14:48

Re: N900 Video Recording - Questions/Concerns

I bought a small card (4 gigs) and only use it for video, I make sure to copy any vid I want onto my pc and format the card each day. Doing it this way gives me best results. Storing to the internal memory gives me alot of frame drops due to the amount of movies/mp3s I have on there, it is probably very fragmented.

ixxe	2010-06-22 15:20

Re: N900 Video Recording - Questions/Concerns

I had real issues with dropping frames and jitter when moving camera im currently using titan kernel but i think i had the issue with stock kernel too.. anyways i seem to have found a working solution at least for me. with a program called cpufrequi its possible to set the way cpu scaling behaves . befor i record a video i swith from on demand to userspace . and now the recording seems much much smoother hope this helps u guys.

esthreel

2010-06-22 16:11

Re: N900 Video Recording - Questions/Concerns

I have a Queen Beecon button for 1GHZ that really helps. The best solution so far, still it is bit sad that iPhone does better with same A8...

ixxe	2010-06-22 17:10

Re: N900 Video Recording - Questions/Concerns

i dont think itss all about cpu power sense i only run it at 700mhz. at 900mhz ondemand setting i get the same frame dropping as 600mhz.

eike.com

2010-07-13 06:09

Re: N900 Video Recording - Questions/Concerns

The frame dropping really sucks and has to be solved, soon.

on3st4b

2010-07-13 07:03

Re: N900 Video Recording - Questions/Concerns

1st thing to do to reduce frame dropping is to use internal memory and not the mmc ( as said lots of times before ) .
2nd is to reduce / terminate running apps in backround
3rd try oc , i know its not a good option , when u buy a device u expect it to function well .

i run mine at 500-850 and recorded a video for testing driving from work to home , the quality is very good ( for a mobile device ) , and i had no frame dropings in 19 mins of video , the file was round 450 mb .

orac	2010-08-02 15:08

Re: N900 Video Recording - Questions/Concerns

Quote:

Originally Posted by on3st4b (Post 749931)

This seems to be the answer - doing this combined with closing apps like web and email made video recording glitches virtually disappear for me. Maybe a few spots at the star of the recording, but then smooth sailing.

For those who like to use the Desktop Command Execution Widget, here is a script to toggle from power-save ondemand to performance ondemand, it displays the current minimum speed:

Code:

#!/usr/bin/perl

my $lower = "125"; # this value is optimal for powersaving in ondemand mode.

my $upper = "805"; # this value is the highest in MHz at any time.



# set the maximum ondemand level to the desired high performance level

my $cmd = "echo ".$upper."000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq";

system $cmd;



# toggle the high performance mode or normal mode

my $freq = `cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq`;

chomp $freq;

if ($freq !~ /^$upper/) {

        $freq = $upper;

} else {

        $freq = $lower;

}

my $cmd = "echo ".$freq."000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq";

system $cmd;

print "$freq\n";

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