How can I maximum compress video files?

I received 4 .mov files from a client that they want on their mobile website via SlideShowPro. Each original file was between 200 and 400 mb. I've gotten each one down to about 30 mb using transmageddon as described here, but that's still really big for a mobile connection.

Is there any way to shrink them even further? Maybe it's the settings; I used Output Format = MPEG4, Audio = AAC, Video = H264 (which is what is suggested by SlideShowPro.)

WOW!

H264 is a high quality video codec but (as you refer), it makes "heavy" size video files.

I am not sure if your question is related to a GUI or Command Line task. But, assumming that you are using "Transmaggedon" I will write this considering the options for GUI applications.

In my case, I prefer the usage of "Mobile Media Converter" which works pretty fine in 32bit systems (both Ubuntu and MS based systems). And the creators have already released a 64 bit version nowadays.

What you wish is to make smaller size video files. Which can be done by changing the "video bit rate", which will give you the best quality, according to the video bit rate you request. In example: a 40MB video file (uncompressed, AVI) will fit in a 5MB video file (any codec) if you use a 800kbps video bit rate. But -of course- it may harm the quality.

I strongly suggest you to perform some testing using the Mobile Media Converter, which can be reached (.deb) by clicking the next link:

http://www.miksoft.net/mobileMediaConverter.htm

After installing, just drop any video files (preferably small for the test) into the drag and drop area, then open the Advanced options by clicking a small arrow that is placed at the very right of the window, below the "browse" button. "[ ... ]"

Next, click in "Advanced" and you will have all the options that you need in order to transcode your video and make small and good quality transcodification.

Remember: The higher video bit rate is, you will have better quality but the file size will become "heavier".

BTW: You can also transcode videos by using a non linear editing system, such as "Kdenlive" (http://www.kdenlive.org/) or "Openshot" (http://www.openshotvideo.com/) and many more. A non linear editing system will also be useful to edit the video (trim, crop, add text and more).

Good luck!

Here is a screenshot for you to see a few options of Mobile Media Converter in action.

[EDIT] Comments saying : As of 2017, because of new firefox extension system, this solution is not working anymore [EDIT]

The best way to compress video I found so far is Firefogg.

• This is a firefox plugin (so it's multi-platform tool as is firefox)
• It will compress to WebM format (open Source - Web compatible codec)
• It offers multiple encoding sizes (really convenient to come up with best compression ratio)
• REALLY efficient compression ratio (at least as much as H264)
• It's super easy to use and 100% offline