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Unfortunately due to patent/licensing issues1, MP4 playback is not supported natively in all browsers. That's where file format redundancy comes into play; if one file format is not able to be natively loaded by a system a backup version may be able to work. I have found that certain browsers will be able to run files encoded with the .webm container using ...


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BTW, this question might be better on stackoverflow, or maybe unix.stackexchange, or maybe serverfault. This site is I think less focused on questions that don't involve decisions based on creative merit or at least perceptual video / audio quality. However, I'm all about the tech details, so I'll answer. FFmpeg uses multi-threading by default, so you ...


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libtheora is single threaded. There is a multithreaded experimental build, but is not maintained. I would suggest running it in parallel with the other encodes. Also if possible use libfdk-aac over libfaac. Much higher audio fidelity at the same bitrate.



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