I have a problem with FLV files converted to MP4 running (in a bespoke html5 player) on IE9 and 10. I've used the same codec (based on H.264 and AAC) to convert files coming out of Premiere, which ran fine in all browsers, but had problems using the same codec to re-encode existing FLV files. its a large archive built over a few years, hence wanting to convert from the output files rather than going back to sources. Can anyone help?
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