How to Change Video Dimensions and Frame Rate on Your Canon EOS 6D
Your Canon EOS 6D can capture high-definition video with dimensions of up to 1920 x 1080 and a frame rate up to 60 fps. You can modify the video dimensions and frame rate to suit your intended destination. To change video dimensions and frame rate:
Flip the Live View/Movie Shooting switch to the left.
You can change video menu options only when video recording is enabled.
Press the Menu button.
The last used menu displays. When you capture video, the Live View Shooting tabs become video shooting tabs. The first Video Shooting tab is identical to the first Live View shooting tab previously discussed.
Use the Multi-controller button to navigate to the Video Shooting 2 tab.
Your Live View video recording options display.
Use the Multi-controller or the Quick Control dial to highlight Movie Rec. Size and then press the Set button.
The video dimension and frame rate options display. Yikes. One of the settings you can choose from is:   [IPB]. The first option is the dimension, the second is the frame rate, and the third option is the type of compression applied to the video. Here’s what all the symbols stand for:
1920: This stands for 1920 x 1080, which is the dimension of the video in pixels. It’s full HD (High Definition), the real deal, Lucille.
1080: This stands for 1080 x 720, which is the dimension of this option in pixels. It’s HD video as well.
640: This stands for 640 x 480, the dimension of the video in pixels. This is standard-definition video.
30: 30 frames per second. Use this frame rate for NTSC video, which is shown in North American countries.
60: 60 frames per second. This frame rate can also be used for NTSC video.
25: 25 frames per second. Use this frame rate for PAL video, which is used in Europe.
50: 50 frames per second. This frame rate is also used for PAL video.
24: 24 frames per second. This frame rate is used for movies. You can also use it for any type of video you record. This was the same frame rate used when video was actually captured on film. The resulting video has a slightly different look, which is reminiscent of video on the big screen.
IPB: Compresses several frames at once, which results in a smaller file size meaning you can fit more video on a card.
ALL-I: Compresses one frame at a time. This form of compression results in a larger file size, but is better suited for editing due to the fact that you’ve got more information with which to work.
Use the Multi-controller or the Quick Control dial to select the desired video dimension, frame rate, and compression format.
You’re ready to record video with the specified dimension and frame rate.