X264 supports a lossless mode without chroma subsampling, which produces very good compression for raw emulator captures of retro game footage. It is much better than other codecs like HuffYuv, etc.

But for some reason, Firefox refuses to play back those kinds of files.

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onion2k 6 hours ago | parent [-]

But for some reason, Firefox refuses to play back those kinds of files.

And that reason is because x264 is a free and open source implementation of the H.264 codec, and you still need to pay a license to use the patented technology regardless of how you do that. Using a free implementation of the code doesn't get you a free license for the codec.

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Narishma 4 hours ago | parent | next [-]

Haven't those patents expired by now?

	▲	layer8 38 minutes ago \| parent [-]
		Some have, but it depends on the profile used, and also on the country: https://meta.wikimedia.org/wiki/Have_the_patents_for_H.264_M...

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anthk 5 hours ago | parent | prev [-]

Just in the US. Not in Europe. At least for decoding.