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rik1138 · 19th March 2011, 01:13

I found a couple of threads about this, but they all ended in discussions about why the question was asked, not if there was a way to do it...

Is there a tool out there that can edit the header of an AC3 file? I need to change the Dolby Prologic surround flags in a bunch of AC3 files, and was looking for a tool to allow me to do that (without re-encoding, just changing the header info...)

Being able to change all the settings would be nice (Bitstream mode, dial norm, input filtering, etc...), but the surround flag is an important one right now...

Any help?

I tried encoding the same file with and without Prologic too look at what has changed, but the flag that is changed is different on every 'frame' of audio apparently... Simple search&replace won't work.

19th March 2011, 01:13	#1 \| Link
rik1138 Registered User Join Date: Mar 2008 Location: LA Posts: 620	Editing AC3 header information... I found a couple of threads about this, but they all ended in discussions about why the question was asked, not if there was a way to do it... Is there a tool out there that can edit the header of an AC3 file? I need to change the Dolby Prologic surround flags in a bunch of AC3 files, and was looking for a tool to allow me to do that (without re-encoding, just changing the header info...) Being able to change all the settings would be nice (Bitstream mode, dial norm, input filtering, etc...), but the surround flag is an important one right now... Any help? I tried encoding the same file with and without Prologic too look at what has changed, but the flag that is changed is different on every 'frame' of audio apparently... Simple search&replace won't work.