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Google Chrome on Windows comes with support for the above media formats, however, Chromium does not.

I want to add support for my own personal use, how can I do this?

I know that on Ubuntu this is solvable by installing the chromium-codecs-ffmpeg-extra and chromium-codecs-ffmpeg-nonfree packages, however I didn't find anything for Windows.

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You have to copy avcodec*.dll files from Chrome installation to Chromium.… -- I wonder if k-lite codec pack installation would fix this.. – medigeek Oct 7 '13 at 17:57
@medigeek - Why is that a comment rather than an answer (assuming you have tested it and are confident it solves the problem)? – nerdwaller Oct 7 '13 at 18:16
You assume correctly, I don't have a windows pc at the moment :) – medigeek Oct 7 '13 at 18:18
@medigeek - Fair enough. The source seems legit - but fair enough :) – nerdwaller Oct 7 '13 at 18:22
@medigeek - Looks like Chrome no longer uses those av*.dll files, since I'm not seeing them in the folder. Replacing ffmpegsumo.dll (the Chrome version is bigger) also doesn't make a difference. – Jay Oct 7 '13 at 18:33

Google has little incentive to support H.264 when they have their own, competing WebM format that they are trying to push. (Haven’t you ever wondered why such a relatively unknown format is one of the formats the YouTube, a Google subsidiary, supports natively?)

Unfortunately, as you have learned, they re-structured Chromium so that you cannot easily drop in H.264 support as you could before. In fact, they have been planning on dropping support for H.264 altogether (even from Chrome) for a couple of years. They plan on switching completely to the WebM by providing WebM plugins for other browsers. (Hopefully they will continue to support JPG and PNG despite trying to push their WebP format.)

What you can try instead, is to use the Microsoft plugin that lets Chromium play H.264 through Windows Media Player. Because it is a plugin, it should still work—unless Google specifically blocked it.

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Hopefully they will continue to support JPG and PNG .... Haha, +1 – rustyx Sep 6 '14 at 9:24
Windows Media Player HTML5 Extension for Chrome This extension is deprecated and no longer available for download. – hB0 Jul 16 '15 at 7:53

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