Summary: The easy workaround to get Sony Vegas Pro work with Canon EOS 5D MOV footage is to Convert MOV to MPEG-2 codec which ensures the best result when using in Vegas Pro.
The Canon EOS 5D is an old full-frame digital SLR as of August 2005 the sensor operates without a conversion factor. New larger 2.5-inch LCD screen can be viewed even at extreme angles of up to 170 degrees.Consecutive shooting allows the capture of 3.0 frames per second for up to 60 consecutive JPEG or 17 RAW frames in a burst. Canon's supplied software applications are named ZoomBrowser for Windows and ImageBrowser for Mac which can play movie clips, and also perform rudimentary movie editing, but it not for windows, and some people are enconterring problems importing video files from Canon 5D into Sony Vegas Pro for further editing. And there are some frequently asked questions quoted as below:
Q1: I've been annoyed that sony vegas and most other apps on my PC can't play the 5D full HD .mov files smooth. I was so excited about not having to transcode any files from shooting to editing. I have settled to transcode. But failed many times. Hope this helps anyone out there. I guess PC doesn't like handling the h.264 codec very well.
Q2: I'm new to DSLR editing and have a bunch of 5D footage for a music video I just shot, and now need to edit it. I use Sony Vegas and have a relatively not that high performance laptop (about 4 years old) that has seen me through other editing projects, but I always feel theres a bit of a loss in quality in the finished product. I thought I'd ask, or if anyone can point me in the direction of places to find information, on 5D workflow for editing in Sony Vegas. If theres no hope for Vegas and my slow computer I will look into other options such as getting new editing software or borrowing someones mac or something.
Although its manual says that "Vegas Pro supports the importing of a wide variety of file formats" including the MOV files, apparently problems always occurred. A QuickTime MOV file opens in Vegas with a "good" sound track, but black screen for the video track. Some users considered upgrading to the latest version Vegas Pro 11 or 12, but there’s limit exits there, like Vegas Pro 11 apparently won't run on Windows XP Pro. So, is there any workaround to overcome all of the problems and limitation?
Actually, the problem lies in the codec, not the format itself. Canon 5D records footage with H.264 codec and save the files in MOV container format. This is an ideal file type for video capture in an SLR camera, delivering relatively compact file sizes with image quality noticeably superior to alternate video compressions (such as Motion JPEG).
However, the H.264 compression format requires that files be transcoded into a format better suited to editing, effects, and color grading; this would usually be MPEG-2 or WMV. Along with third-party software, you can easily achieve your goal smoothly.
The best program I can recommend for transcoding Canon H.264 MOV to MPEG-2 on Mac is Brorsoft Video Converter, an easy-to-use yet powerful video converter, editor and player. With it, you can make the experience of editing Canon EOS 5D HD video footage with Sony Vegas Pro as fast and seamless as possible. If you are facing problems editing with Vegas Pro 10/11/12, chances are you already installed this great utility. If not, download it from here.
How to Convert Canon 5D H.264 MOV footage to MPEG-2 for Vegas Pro
Step 1: Transfer the h.264 encoded .mov files from Canon 5D to your PC via USB cable. Run the best Canon MOV Converter, and click the "Add" button to load .mov videos.
Tip: If you want to merge MOV clips, just need to check the "Merge into one" box.
Step 2: Click on the Format box to get the dropdown menu. Select Adobe Premiere/Sony Vegas --> MPEG-2 (*.mpg) as output format.
Tip: Click "Settings" button, you can adjust video and audio parameters, including the Bitrate of Video and Audio, the Codec of Video and Audio, Video Size, Sample Rate, Frame Rate, Audio Channels, etc., in the Profile Settings.
Step 3: Click "Convert" button to convert Canon 5D MOV to Sony Vegas Pro MPEG-2.
Once the conversion completes, you can click "Open" button to get the output files effortlessly. Now you have got it right, just to import and edit Canon EOS 5D H.264 MOV files within Sony Vegas Pro 8/9/10/11/12 at ease.
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Source:How to Get Sony Vegas Pro work with MOV files from Canon 5D