posts tagged with the keyword ‘mpegstreamclip’

2013.05.18

This is the method I use for creating 1280×720 (aka, 720p) time lapse video files from a GoPro camera using MPEG Streamclip.

Go Pro stills compiled into video

I use the time lapse setting on the GoPro, which creates images that are 2592 pixels wide by 1944 pixels high, though we care less about the pixel width and height, and more about the aspect ratio, which is all wrong for a proper video. (In fact, you can use this method for any still images you wish to finish as a video file.)

I start by compiling all the stills into a video file, and I use QuickTime Player 7 for that. There are other tools, but that’s what I’m currently using, and no the most recent version of QuickTime Player is hobbled crap that won’t work. (Hey Apple, how about fixing that?)

OK, we have our video file, but it’s practically square! Terrible! So let’s fix that…

1280 wide image

To choose the best crop I usually do a screen grab of the image area, and then open that in Photoshop (or whatever) and size it to 1280 wide. The height should be about 960 (depending on how accurate your screen shot is.) Time for Math! 960 – 720 = 240, so we need to crop 240 pixels from the height. You can easily just skip this step and plug 120 into the top and bottom crop, but this step will let you easily make some other decision, like 140 and 100. As long as your top and bottom crop add up to 240, you’re good.

Cropping to 720 height

Sometimes I like to make a marquee that’s 1280 x 720 to get a better idea of the crop… Feel free to skip this step if you don’t need the precision I require in every single thing I do.

MPEG Streamclip settings, with crop

OK! Here’s the export window in MPEG Streamclip, where you can see I’ve set the size of the video to “Other” and plugged in the 1280 x 960 values. I then put the 140 and 100 values in the top and bottom crop boxes, respectively. All the other settings are what I typically use for MPEG Streamclip. (The one thing I tend to change which isn’t show here is the ‘Limit Data Rate’ value. But that’s a post for another time. Oh, I didn’t do it here, but you can disable the audio track as well.)

Final 1280x720 Video File

Here’s our final video output at 1280 pixels wide by 720 pixels high. Now, since we started with a video that was 2592 pixels wide by 1944 pixels high, we could actually get all fancy and just select a portion of the video to output at the final resolution. This involved a lot more math, but it’s a possibility, so I’ll leave it up to you to explore.

Now go make some time lapse videos!

2009.06.07

We recently had to create a jump drive with promotional content on it that we wanted to be reasonably sure people could open. For the HTML pages, this was pretty simple. We kept the design very easy, and used just a single file, with the CSS in the head of the document. Any web browser created in the last 10 years should have been able to read it. (Even IE6 did fine with it!)

We also put video content onto the jump drive. I had a sample someone had given me from a company they used to do business with, and while it worked fine on my Mac, Windows was a no-go. Windows XP was the test platform, without QuickTime installed. Now, granted, lots of Windows machines would have QuickTime if iTunes were installed, and iTunes is installed on a lot of Windows machines, but locked-down corporate PC’s may not fit in that category.

So, we wanted to create a video that would be playable on Windows without QuickTime installed. And, we’re a Mac shop, so we wanted to do this all on a Mac. We ended up exporting the video from Final Cut Pro, and then using MPEG Streamclip to create an AVI file, using the settings you see in the screen shot below.

Encoding Video with MPEG Streamclip

It worked well, and testing with various Windows VM’s seemed successful, with the videos playing fine where QuickTime was not installed.

So for now, this is my solutions. Unless someone has a better one.

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