Stereo to 5.1

[Gale_Andrews]

@@tnehal

I m trying to export with ac3 than what is channel ordering?
And original audio is AAC, 48 KHZ, 0KBPS, STEREO from which i try to convert in ac3 so what channel order should be ideal and it works perfectly sync with original aac audio?

Please do not post the same questions in multiple topics. I answered this at General information - #8 by Gale_Andrews .

@@tnehal

which format is best for export 5.1 (with small storage size and good quality)

No lossy format has perfect quality.

If you are using the “Copy” option in Avidemux (which is sensible) there may be limitations on the audio formats that it will accept for the particular video format. However we will not give technical support for Avidemux or video encoding on the Audacity Forum.

AAC (M4A), AC3 and MP3 all take up approximately the same file size for comparable quality. See: Audacity Manual .

It is fairly generally believed that MP3 needs a slightly larger bit rate and hence file size to sound as “good” as M4A or AC3.

I would tend to use AC3 because the AAC encoder in Audacity is slow and removes a small piece of audio at the end (this is a bug in the AAC encoder used in the rather old version of FFmpeg that Audacity supports, not an Audacity bug).


Gale