Why is my iPhone 4S Video Camera Changing Frame Rates?

I've been doing some video tests with my iPhone 4S and I've found that in low lighting situations it's recording video at 24fps instead of the advertised 30fps. In good lighting conditions it's recording at 30fps. It's obvious the camera is compensating for the light with the lower frame rate, however, when I got into iMovie or Quicktime Pro to cut together some footage, the two different frame rates are causing an issue because they aren't consistent. The footage gets jerky and there's audio clicks. None of this happens when they're played individually. Please advise.
ps I downloaded some other video camera apps and even ones that will lock you in at 30fps will still record at 24fps in low light situations, so it has to do with the Phone. Anyone know a workaround for this? Thanks!

You can zoom before you start taking a video, but not after you start the video. Sorry.

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The iPhone 5 and 4S.
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8-megapixel iSight camera
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http://www.apple.com/iphone/iphone-4s/specs.html
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Message was edited by: w7ox

Changing frame rate when exporting from iMovie '09 using quicktime has no impact on duration. Why?

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I have a file created by digitizing an 8mm film at a rate of 24 fps. I would like to create a downloaded movie at a frame rate of 15 fps. The Export using Quicktime option seems to provide that capability but the resulting file has the same duration as the original 24 fps file. How can I get the exported movie to be slowed down?

joegez,
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Hope this solves the problem for you.

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HI All
I want to play video on my computer to make some analysis to it's frames,the problem that I face ,I can't change video frame rate using labview,but I can change frame rate to the video out of labview using some program .
I used IMAQ AVI Read Frame VI
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Hi abdelhady,
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Want to change frame rate, help, please !!

hi all,
i want to know whether, jmf does provide any support for changing the frame rate ? is there any ways by which one can change the framerate, of a live captured video ?
i came across one class "FrameRateControl" in jmf, tried it, but wasn't successful in changing the frame rate. plz help me guys.
if u have came across, when doing live capturing using jmstudio, we can change the frame rate. can we do that in our programs tooo.
please someone, wew64, watergad.......... help me out..........,
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niraj.

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import java.applet.Applet;
import java.awt.*;
import java.io.*;
import java.net.*;
import javax.media.*;
import javax.media.cdm.CaptureDeviceManager;
import javax.media.control.*;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;
import javax.media.protocol.*;
import javax.swing.*;
import java.util.*;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class TVCapture extends Applet {
static Player player = null;
Format [] formats;
     FormatControl [] vfc = null; // Video FormatControl
     CaptureDevice vcd = null; // Video CaptureDevice
     private DataSource vds = null; // Video DataSource
     public void init(){
          try {
               vds = Manager.createDataSource(new MediaLocator("v4l://0")); //on linux
//               vds = Manager.createDataSource(new MediaLocator("vfw://0")); //on windows
          } catch (java.io.IOException _e)   {
               System.out.println(_e);
          } catch (NoDataSourceException _e) {
               System.out.println(_e);
          vcd = (CaptureDevice)vds;
          vfc = vcd.getFormatControls();
          if (vfc != null) {
               System.out.println("vfc ! = null");
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               System.out.println("vfc.length = " + vfc.length);
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               int i;
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//               Format tmpFormat = vfc[0].setFormat(supportedFormats[6]);
               Format tmpFormat = supportedFormats[6];
               System.out.println("tmpFormat = " + tmpFormat);
               System.out.println("tmpFormat.getEncoding() = " + tmpFormat.getEncoding());
               System.out.println("Dimension size =" + ((VideoFormat)tmpFormat).getSize());
               System.out.println("maxDataLength =" + ((VideoFormat)tmpFormat).getMaxDataLength());
               System.out.println("tmpFormat.getDataType() = " + tmpFormat.getDataType());
               System.out.println("frameRate = " + ((VideoFormat)tmpFormat).getFrameRate());
               VideoFormat videoFormat = new VideoFormat( tmpFormat.getEncoding(),
                                                  ((VideoFormat)tmpFormat).getSize(),
                                                                 ((VideoFormat)tmpFormat).getMaxDataLength(),
                                                                 tmpFormat.getDataType(),
                                                                 25.0f);
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               //but setFormat is working on windows
          } else {
               System.out.println("cannot get the formatControls()");
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          setSize(320,240);
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player = Manager.createRealizedPlayer(vds);
player.start();
Component comp;
if ((comp = player.getVisualComponent()) != null) {
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//               add (player.getControlPanelComponent());
} catch (Exception e) {
e.printStackTrace();
public static void playerclose() {
          if(player != null) {
     player.close();
     player.deallocate();
public void close() {
          if(player != null) {
               player.close();
public void destroy() {
          if (player != null) {
          player.close();
          player.deallocate();
public void stop() {
          if (player != null ) {
          player.stop();

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Hello
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# Le quitamos el over-scan al ancho. OJO!! debe seguir siendo MULTIPLO de OCHO
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OUTPUT_V_PAD_WIDTH=$(($OUTPUT_OVS*4))
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BaDumPum!
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stage.frameRate = x;
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According to the accepted answer on this post: http://forums.adobe.com/message/4019538, it seems that:
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Dave.

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ymotion

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