This is a full guide about Apple iPhone, it should be easy to understand. If you have any problem about this guide, feel free to post here. I will reply to you ASAP.

iPhone Supported Video format:
H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
H.264 video, up to 768 Kbps, 320 by 240 pixels, 30 frames per second, Baseline Profile up to Level 1.3 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats

2. How to rip DVD and IFO to MP4 for iPhone

Step1. Download the DVD to iPhone Converter. Run it and Load your DVD by clicking “Load DVD” button, you also can load IFO file from your hard drive by clicking “Load File” button.
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Step3. Click the drop download list to select the Audio and Subtitle you want, you also can change the output location. A regular DVD movie has several titles, such as MTV DVD, by default, this software will merge all the DVD chapters into one video clips, you can check the click box before the title list to select any DVD clips you want to rip.
As format: This software supports three Apple products: iPhone, iPod and Apple TV. It can rip DVD to MP4, M4A; it also can rip audio from DVD to MP3, AAC. Just select “iPhone Video MPEG-4 (*.mp4)”
After you finish the settings, click “Start” button to start the conversion.


3. How to rip DVD and IFO to MP4 for iPhone For Mac Users
  1. Download ikysoft DVD to iphone converter for MAC, For intel users pls download this interl version, For Power PC users, Pls download this Power PC Version . If you browse with Firefox, pls right click and choose save target as..(as firefox now does not full support dmg file download).
Step 1: Add DVD Movie

Click the Load DVD button, browse your computer, find the DVD folder of the movie you want to add from your hard disc or DVD-ROM, open your DVD folder, select the VIDEO_TS folder and click OK.

Or, click the Load IFO button, browse your computer, find the DVD folder of the movie you want to add from your hard disc or DVD-ROM, open your DVD folder, open the VIDEO_TS folder, select all the IFO files and click OK.

After you add your movie, you can choose any titles or chapters that you want to convert by ticking the check boxes before them.

Step 2: Output Settings

At the bottom of the main window, you can name the output file for the current title/chapter, and select a subtitle to put on your movie, select an audio track. Then finish all the settings including selecting an output format, clicking the Settings button to set the video and audio encoding settings, choose if to merge the selected titles or chapters into one file, and set an output directory to save the output files.

Step 3: Start Conversion

After setting the output settings, you can just click the Convert button to start converting your Movie. You can choose to shut down your computer or open the output folder after conversion so you don’t have to sit before your computer waiting for the conversion to finish

3. How to convert AVI, MPEG, FLV, WMV, MOV, ASF, MP4, DAT, RM, RMVB, MPG, 3GP to MP4 for iPhone
 Download “Aimersoft iPhone Converter Suite”, install and run it. For Windows Vista user, you may have to run this program as Administrator, right click the program shortcut and click “Run as Administrator”.
1. Click “Video to iPhone Converter” to load the Aimersoft Video to iPhone Converter. Then click “Add” button to load video files. This software supports batch conversion, so you can add several video clips at one time.

2. The operation is similar with DVD to iPhone Converter, this software can join several different video clips into one file, if you want to join video, just check the box “Merge into one file”. You also can customize the resolution, video bit rate, encoder, frame rate, audio bit rate, channel, etc in the setting panel by clicking the “Settings” button. The program also lets you create a profile and save it, then you can use different settings for each video clips.

3. Click “Start” button to start the conversion after you finish the settings.

Tips:
1. This software provides rich video editing functions for you to trim, crop and edit DVD movie. Click the “Crop” button, and then you will see a pop up window (See the figure below). There is a frame in dashed line around the movie video; you can drag it to cut the black edges.
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2. You can click the “Effect” button and customize the brightness, saturation, contrast, volume, etc . You can even apply special effects such as “Emboss”, “Negative”, “Old film” and “Gray” by selecting an effect from drop-down list.

3. This software can capture pictures from DVD movie, there is a small camera icon below the preview windows, click it when you preview the movie, it can save picture as JPEG and BMP.