If you can do native HD video, the dimensions are 1,920 X 1,080, which equals 2,073,600 pixels. (Figure 2) Standard video (SD) is generally 720 X 480 pixels-that equals 345,600 total pixels per frame. There are three measurements that count for a lot in determining the final file size.įirst, the actual pixel dimensions of the finished product. SD (Standard Definition), frame rate, color depth, even the amount of movement in the video. Video file size depends on many variables: HD (High Definition) vs. If you’re delivering to multiple platforms, it’s worth a look. YouTube, and a few of the other video services, also automatically deliver different video codecs to different platforms like iOS or Windows. Although the server sizes seemingly approach infinity at YouTube, when it comes to uploading, the only worry about file size is how long it might take to upload a large file.
The video you upload to YouTube gets compressed the way YouTube wants to compress it, no matter how you compressed it originally. The bandwidth requirements are such that your IT department will not have anything nice to say about it. Furthermore, while you can stream an uncompressed video file (.avi), it’s not easy. What affects file size?Īny timeline-based project (Figure 1) must be compressed in order to put it on YouTube, Vimeo, your servers, or wherever you need to store and access it. But what do we know about compressing video except to use the Adobe Media Encoder or a standalone program like Sorenson Squeeze (or DivX, Microsoft, Apple, etc.) and several other video compressors? Does the file type you create matter? Yes. How you compress your video and what form you compress it to makes a difference. Some of us can use our own servers for video rather than YouTube’s or Vimeo’s or some other video service, but we all have file-size limitations and bandwidth issues. If you’re in the “most of us” category, you are compressing your video whether you know it or not. Most of us already use or are beginning to use video in our eLearning. But you aren’t dealing in petabytes of video so why does this matter to you? The only way this works is because YouTube compresses all that video during upload. Petabytes of video, every day (a petabyte is a million gigabytes). That’s over 69,000 hours of video a day, every day. Last year, YouTube reported that users were uploading 48 hours of video to the service every minute.
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