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Old 03-13-2010, 06:29 PM
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I don't think it will ever happen if it hasn't happened so far...
by the way...
I'm read to add my knowledge...
Unfortunately my i8910 is at Samsung since 12th January....I should have it back in the next days...
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Old 03-13-2010, 07:16 PM
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Your video has exact 23,83 fps on the length of 17s and 16 frames.
16 khz and 96 kbit audio.

Today i recorded a video with exact 23,76 fps. Nearly the same (16khz 96 kbit)

On my testing-conclusion result i get exactly 24 fps with NO dropped frame with 16 khz audio and 48 kbit audio.
In my opinion, 48 kbit and 96 kbit has no differences. Just note that the setting-values are limited !
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Old 03-13-2010, 07:44 PM
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Quote:
Originally Posted by hyperx View Post
Your video has exact 23,83 fps on the length of 17s and 16 frames.
16 khz and 96 kbit audio.

Today i recorded a video with exact 23,76 fps. Nearly the same (16khz 96 kbit)

On my testing-conclusion result i get exactly 24 fps with NO dropped frame with 16 khz audio and 48 kbit audio.
In my opinion, 48 kbit and 96 kbit has no differences. Just note that the setting-values are limited !
yes..consider 48 as a 96 stereo and 96 as a 192 stereo..you get "trasparency"("same" of an uncompressed format) in aac format using 96 kbps for each channel(as you get in mp3 using 160kbps for channel = 320kbps stereo)..this means that nokia and omnia hd use maximum aac bitrate that has sense (over 96kbps for channel there is no sense in an aac encoding)...so you can consider trasparency value(96 aac mono = 192 aac stereo) as a 320 kbpsstereo mp3...and you consider 48 aac mono = 96 aac stereo similar to a 160 stereo mp3..

so, using for example a good mp3, it's difficult notice differences between 160 kbps stereo and 320 kbps stereo if you don't use very good output devices.

so, in a phone recording (and with a low sampling rate) maybe will be impossibile listen differences between a 48kbps mono and 96kbps mono..with higher sampling rate maybe yes, but maybe

if you make the same video using 48 and 96 kbps values, also we can judice

Last edited by fenomeno83; 03-13-2010 at 07:51 PM.
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Old 03-13-2010, 07:52 PM
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I will upload 2 test videos later.... unfortunately since my moving i have a very slow internetconnection:

~25 kb/sec upstream :-|
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Old 03-13-2010, 09:01 PM
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I'm now at home.... with closed doors...testing solution....

So, what do you guys use to extract media informations?

Just be aware that your players/PCs can produce frame drops...

More samples data
-------------------
25.png28.png

Dropped frames are from first 7-8sec of videos

-------------------

Mediainfo from posted file :

Video
ID : 1
Format : MPEG-4 Visual
Format profile : Simple@L6
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : 20
Duration : 17s 541ms
Bit rate mode : Variable
Bit rate : 11.9 Mbps
Nominal bit rate : 7 550 Kbps
Maximum bit rate : 8 389 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.540
Stream size : 25.0 MiB (99%)
Encoded date : UTC 2010-03-13 14:38:22
Tagged date : UTC 2010-03-13 14:38:22

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 17s 664ms
Bit rate mode : Constant
Bit rate : 96.0 Kbps
Channel(s) : 1 channel
Channel positions : C
Sampling rate : 16.0 KHz
Resolution : 16 bits
Stream size : 203 KiB (1%)
Encoded date : UTC 2010-03-13 14:38:22
Tagged date : UTC 2010-03-13 14:38:22

Last edited by wireless; 03-13-2010 at 09:06 PM.
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Old 03-13-2010, 09:07 PM
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Here the Video/Audio comparision:

http://hyperx.garrettcullum.com/Video_sample.rar

Last edited by hyperx; 03-13-2010 at 09:17 PM.
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Old 03-13-2010, 09:38 PM
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Very little difference in sound quality so 24FPS with no dropped frames and 48Kbps audio would be acceptable with the 16Khz sample rate. If it was possible to increase the sample rate, the audio bitrate would probably be better at 96Kbps with just below 24FPS and I think that would be a compromise worth taking

Keep up the good work guys
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Old 03-13-2010, 10:00 PM
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As this is with ONE purpose (video recording quality) can I suggest a mix of these two threads?

This one with: [BREAKTHROUGH NEWS] New HyperX firmware in progress! Better sound and 24fps HD Rec!

(perhaps a name change for "breakthrough news progress better ..." as two persons are envolved)
---------------------------------

either way: I think audio MONO 16Khz, 16bit, 48kbps (kbit/s) is enough as itīs much easier to put up than video dropped frames.

As HX says, there are limited settings and some give problems so why lose so much time with this? HX/wireless settings with 24fps + 16Khz,16bit,48kbps is extremely decent!

Another thing: VIVAZ uses S60v5 and stable video. With a Vivaz dump could it be that with camera app + settings + lower bitrate(Vivaz runs his SoC @ 720Mhz, 120MHz plus than i8910īs...) it works? I say this because perhaps Vivaz has a more optimized encoding code/routines...
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Old 03-13-2010, 10:06 PM
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I just got the vivaz Firmware... so i will look into it ! .... what a weekend... working all the time on only one thing. .... Think itīs time to go out sometime....
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Old 03-13-2010, 10:21 PM
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Quote:
Originally Posted by hyperx View Post
I just got the vivaz Firmware... so i will look into it ! .... what a weekend... working all the time on only one thing. .... Think itīs time to go out sometime....
LOL I have one problem myself: when I start something I canīt stop before I get it right

You deserve the break donīt you have friends heavily specialized on A/V enconding + Cortex A8 code tunning to take a drink with?
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