[FFmpeg-user] Dolby Pro Logic encoding from 6 discrete channels

[dE .]

On 12/09/11 03:58, Thomas Worth wrote:
> HandBrake is apparently capable of folding 6 tracks of audio down to a
> matrix-encoded 2 channel Pro Logic mix. I'm assuming this is done
> through avcodec. If so, which part of the code is responsible for
> this? Also, this is really an analog operation, since Pro Logic / II
> works with analog sources. Has this been tested / verified to work as
> intended? I'd love to hear about any experiences with this.
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Pro logic technology works over any connection, either it be over 
satalite TV, 3.5mm, RCA or even S/PDIF and HDMI (confirmed, I've a pro 
logic IIx decoder connection to my PC though S/PDIF).

I also confirm that handbreak does atleast 5.1 to 2 channel, but it can 
only encode videos. I asked the developers, they said the backend was 
either the decoder or downmix.c.

https://forum.handbrake.fr/viewtopic.php?f=7&t=22750 
<https://forum.handbrake.fr/viewtopic.php?f=7&t=22750>

ffmpeg guys may borrow code from here.

Devs -- are you listening? I reported a bug, maybe I should post this 
link there...