[Q] Is it possible to record any video with CFR (Constant Frame Rate)? - Motorola Droid RAZR

Here's what I want to do: I'd like to be able to take multiple videos throughout the day and then at the end of the day join them together as one video to upload to YouTube.
Here's the problem: I can't join videos together that are VFR (variable framerate). They need to be converted to CFR first. However, no matter how I try converting them, I always end up with audio/video sync problems. I've spent days and done lots of research and tested several programs/methods to accomplish this. There's still more for me to try, but so far I've not been successful.
Which brings me back to: If I can just get the RAZR to record videos with a constant framerate, the above problem(s) should be eliminated.
My current favorite camcorder app is the LG Camera ("LG" having no relation to the electronics manufacturer). It has many options and blah blah blah. One of the options is to set the framerate. Offers selections as low as 2 FPS up to 60 FPS. Unfortunately (and I have emailed the dev about this), changing this setting doesn't seem to have any effect.
This could be because of a firmware limitation of the device itself, or it could simply be a bug with the app. I don't know yet. I'm trying to find out.
I did find another post around here about recording videos at 120 FPS or something like that. Seems that making some edits to the build.prop file made the phone think it was recording at that FPS but the resulting file showed otherwise. Well, I'm not looking for any real high FPS for my videos. I figure somewhere around 30 should be good enough. The only thing I really want to know is if there is any possible way I can force the camera to record at a constant framerate.
Perhaps the build.prop file can be edited to allow this. I'm not sure. I certainly hope this is possible one way or another, though.
Thanks for your time.

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I was one of the people doing the 120fps experiments, and as you noted, nothing worked. I'm thinking the cpu is simply sending a stream of data that the phone must accept.
I'm pretty sure the phone records in a variant of motion jpeg, and simply takes up to 30 stills per second. I've edited these files myself, and it's a pain in the a**.
You need to find a setting in your video editing app that allows for variable framerate content. VFR for short.
Also, .avi containers doesn't support VFR content. You need to save to MKV, MP4, WMV or ASF. Probably more containers, but those are common.

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Thanks for the response.
Well, bad news and good news.
Bad news is, I was never able to find any program that could properly convert and/or join the video files without blatant sync problems as a result.
The good news is that the above is not 100% true. After posting my question, I had received some help elsewhere and ended up using ffmpeg and MEncoder (both command line tools for video processing). ffmpeg converts the files to CFR and then MEncoder joins them together. These two utilities combined with the automation power of AutoHotkey allowed me to create an AHK script that will convert and join all the videos successfully simply by dropping the files in the folder and running the script.
In the rare case someone else comes here with the same problem, here's the video-help thread that brought me to this solution: ~~~ Okay, I can't post links. In that case, here's a sample command line for converting the file to CFR:
Code:
ffmpeg -i input01.mp4 -c:v mpeg4 -b:v 1800k -c:a copy -vsync 1 -r 25 temp_output01.mp4
You'll have to run ffmpeg separately on each file, I believe.
Here's a sample MEncoder command line for joining the converted files together:
Code:
mencoder input01.mp4 input02.mp4 input3.mp4 -vf harddup -ovc copy -oac mp3lame -lameopts cbr:br=128 -o joined_output.mp4
You can enter in as many input video filenames as you want to join together.
After I found a solution for converting and joining, I decided to leave this post up because I still wanted to find out if recording in CFR on the Droid was possible. I'm guessing it isn't. That's too bad.

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I read about that actually, problem is that directly converting to CFR makes the video somewhat choppy. As you are either playing the same frame twice, or removing a frame to compensate for the fps you're using.
If I'm not too confused, you can interpolate the missing frames to make it appear smoother. At least in some video editors.

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Yeah. Fortunately, so far I haven't noticed any obvious issues with the final video.