We've just moved to ESR 45 from ESR 38 on a number of Macs, but are having problems playing back Quicktime videos - the 'error' is 'Video can't be played because the file is corrupt'

However, setting the preference media.mp4.enabled to false, allows these Quicktimes play

Unfortunately, this setting means that mp4 videos no longer play ...

This wasn't a problem with ESR 38 - and Firefox 48 doesn't have this problem either

I've found the following:

https://support.mozilla.org/en-US/questions/1115863 which states:

Starting in Firefox 45, media sent with the video/quicktime content
type is treated as MP4 media to be handled by the built-in HTML5
video player. But MOV files can contain a variety of different
encodings, they are not all MP4.

Does anyone know of a work around for this problem with ESR 45 ?

Thanks

James Pearson



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