Do You Have This Problem In Camtasia?
Here is a question that I received recently and since this seems to be a universal problem I thought I’d include it here:
Is it normal to have a tutorial of 20 min duration- (with no audio, only mouse clicks and keyboard clicks and callouts to direct the user) - to have a file size of 51 MB? Is there any trick to make it smaller? (I tried to decrease the capturing screen size, and it does make the file size smaller, BUT it makes it low resolution!)…so I am sure there’s another way to solve this, since everyone uses it and don’t end up with extra huge file size!
And here is my rather long answer:
WOW! 20 minutes with no audio and a file size of 51 MB is huge! My videos WITH audio would be in the order of 10 to 20 MB. Usually when someone has too large of a video file it means they tried to capture too large of a window (like full screen).
First, I don’t believe in mouse and keyboard clicks. That makes a bigger file and adds the audio layer to the videos. Movement of the mouse also makes bigger files so try to keep it to a minimum.
Next using smaller screen capture makes smaller video files. I’m not sure why the statement: “I tried to decrease the capturing screen size, and it does make the file size smaller, BUT it makes it low resolution!” If you capture smaller screen sizes (like 640 by 480) and then play them at that size there is no change in resolution. If you try to capture the full screen and then play back at 640 by 480 the resolution does get worse.
Playback videos should be 640 by 480 pixels. That will work for just about anyone’’s computer monitor. The smallest setup for computer monitors today is 800 by 600 pixels. With the browser that allows a video of about 640 by 480 pixels without having scroll bars. I have experimented (and actually use in my software tutorials) recording up to 840 by 630 pixels capture window and then making the final videos at 640 by 480 pixels and still have good enough resolution to read the screen. I also use a ratio of 4:3 for my capture windows (e.g., 840 by 630, 760 by 570, 740 by 555, 640 by 480, 320 by 280, etc.).
Another question, what frame rate are you using? For the Internet I usually use 1 frame per second. Don”t use the automatic setting. You can use the automatic setting for video capture but in Studio set it to either 1 frame per second or 5 frames per second (max). Set the colors to 16-bit in Studio. I also try to keep my videos under 10 minutes. That keeps the file sizes smaller too. So I would split a 20 minute video into two or more. Also, zipping a video file will not get you much advantage. About the only reason to zip them is when you have multiple files and want to keep them together. Videos are already compressed to the maximum… that’s why you don’t get much reduction when using zip.
