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GALNET's fix for choppy 720p recording in CM7/MIUI

OP michelfeldman

17th June 2011, 11:38 PM   |  #1  
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ALL THE CREDIT FOR THIS FIX GOES TO GALNET

Galnet posted a fix for 720p choppy recording in the MIUI post.
The problem I found was that it didn't work for everybody.
So, after doing a tkdiff on the changed file for the fix: media_profiles.xml, I saw that the 720p fix is a change of the recording bitrate from 12,000,000 to 10,000,000.
For my phone it wasn't enough and I was still getting choppy recordings, so lowered the bitrate even further to 5,000,000 and now I have flawless 720p recording!!!

How to fix the issue:

1) Make /etc/ R/W (use root explorer)
2) Edit the file: media_profiles.xml and change the bitrate line:
<CamcorderProfiles cameraId="0">
<EncoderProfile quality="hd" fileFormat="mp4" duration="60">
<Video codec="h264"
bitRate="12000000"

to:
bitRate="5000000"

3) save the file
4) make /etc/ R/O again
5) enjoy 720p recording

NOTES
1) HD playback is still choppy -- so you have to transfer the file to your computer to test!!!
2) You can try and increase the bitrate from 5000000 to 10000000 (which was GALNET's original value) -- and if it is still good for you great.

THANKS A LOT GALNET!!!
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17th June 2011, 11:47 PM   |  #2  
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Somebody knows what the bitrate is for 720p videos in Samsung roms?
18th June 2011, 12:07 AM   |  #3  
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JVP:

quality = 'high'
fileformat = 'mp4'
duration = '60'
video codec = 'h264'
bitrate = '10000000'
width = '1080'
height = '720'
framerate = '30'
18th June 2011, 12:09 AM   |  #4  
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Quote:
Originally Posted by HaTeNL

Somebody knows what the bitrate is for 720p videos in Samsung roms?

On XXJVP rom the bitrate for recorded 720p videos is ~12mbps
18th June 2011, 12:16 AM   |  #5  
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When on cm7 i found out that playing with different cpu governors influences the 720p choppiness more or less as well. Conservative governor messes 720p up, while on demand improved it....but didnt get rid of it.

Havent tried galnet's fix or their latest miui but on a pc the reported bitrate of 720p material from SGS is ~12mbps + ~2mbps audio track

Im on Doc kitchen jvp rom now with SGS2 camera app and works butter smooth. Its not just the recorded material that is smooth but also when panning around just after starting the camera app is very fluid (as opposed to cm7/miui)
Last edited by zerozoneice; 18th June 2011 at 12:20 AM.
20th June 2011, 08:59 PM   |  #6  
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Thanks! I also found out about this workaround by looking at the patch to 7.7, which diff showed a change from 12,000,000 (in 7.5) to 8,000,000. I don't recommend lowering that value to 5,000,000 because more kb/s = smoother video. Though I noticed something strange:

1. After upgrading to 7.7 (8,000,000 bitrate), I tried catching a HD video with MiuiCamera, that produced a very choppy video (still...) with unsynced audio.
2. I catched another 720p video with Android Camera, and the result was better, though I don't like the m4v container for the output files.
3. I used MiuiCamera to record another HD video, but this time it was perfect!
4. The following videos shot by MiuiCamera were still as good, even after a reboot, for now.

So, I don't think we require the Camera.apk to make MiuiCamera.apk work as it should. There is probably something about the governor or kernel ticks (HZ) which is clashing with the 720p recording. For the "record" (lol), I'm using the smartass governor on Zach's NEO 08, while scheduler and OC/UV don't seem to have a high relevance.

Also, why does MiuiCamera produce a 3gp video for 720p recordings, while it's clairly specified to use the mp4 container? I also used Avidemux and ffmpeg to check the video, and it has a 1280x720 resolution with H.264 and AAC codecs. So, why the 3gp extension?

EDIT: I forgot, have you understood why the m4v max bitrate was lowered to 2,000,000 while stock JVP has 12,000,000 ?
Last edited by thunderteaser; 20th June 2011 at 10:38 PM.
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13th October 2011, 07:34 AM   |  #7  
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Any other feedback aside from this comment?? I would appreciate if you guys found a way recording a nice 70p vdieo from my phone
13th October 2011, 08:02 AM   |  #8  
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Currently on CM7 recording is bad, doen't work properly. Users from galnetMIUI forums claim that recording works fine with Chameleon release. Fix is not public, so... CM7 hasn't got proper 720p video recording
13th October 2011, 08:38 AM   |  #9  
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It isn't the unique change...
13th October 2011, 10:02 AM   |  #10  
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Probably some more changes in the kernel also.There was a thread on their forums, where a user said thar 720p recording works only with default kernel, while with custom kernels doesn't. It's quite annoying, using a stock/custom ROM based on official looks really slow for me, using CM7 feels really good and fast... but with the loose of recording, which I really need for my little girl's unique moments in life recording. The High setting for camera in CM7 makes recording possible, there are very small glitches sometimes, but it's a pitty to not use it a fully potential.

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