Help please, convert EAC3 to AC3

[Evokazz]

Hiya guys, I have never had issue with my Denon AVRX2200W playing different formats, but run into a movie with Dolby Digital Plus (EAC3) and whilst it's playing the audio, there's no center speaker. Not sure if my amp doesn't support it, but how can I convert EAC3 to AC3? I was hoping it was something Avidemux or something could do? I don't want to change quality or anything, just convert. Step by step would be amazing.

[pandy]

At first you can try online (real time/live) E-AC3 to AC3 conversion - AFAIR ffdshow and dedicated http://www.ac3filter.net/wiki/AC3Filter offer such feature - sadly seem both are bit outdated.

[sneaker]

If you are playing from your PC or another player that convert the audio during playback I prefer something as pandy suggested.


Otherwise:
ffmpeg -i "INPUT" -map 0 -c:v copy -c:a ac3 -c:s copy "OUTPUT"

In AviDemux it should be as simple as opening the file, setting video to "copy" and audio to "ac3 (lav)", then saving (ac3 usually in mkv container).

[sekininsha]

With eac3to can also use your gui UsEac3to


[Attachment 46095 - Click to enlarge]

[sneaker]

Note that eac3to can handle less EAC3 variants than ffmpeg. So should eac3to fail it can still make sense to test ffmpeg or other ffmpeg based software.

[mgutt]

Is it possible to convert only one specific EAC3 track without overwriting the existing ones? And how can I avoid that FFMPEG adds global tags, tags and a V_MJPEG track?!

Before:

[Attachment 51047 - Click to enlarge]

After (with @sneaker 's code):

[Attachment 51048 - Click to enlarge]

[sneaker]

Is it possible to convert only one specific EAC3 track without overwriting the existing ones?

ffmpeg -i "INPUT" -map 0 -c:v copy -c:a:0 ac3 -c:a:1 copy -c:a:2 copy -c:s copy "OUTPUT"

https://ffmpeg.org/ffmpeg.html#Stream-specifiers-1

[dfisher052]

I agree with sneaker. I do it all the time with avidemux. It's faster and easier than anything else I've tried.

[mgutt]

@dfisher052

avidemux does not open all my MKV files and it removes the chapters!

And finally it takes a long time to open a file. Only for converting UsEac3to is much faster (if it works), but the most comfortable app (if it works) is Popcorn MKV AudioConvert because of its ability to batch convert a complete folder.

[mrhollywood]

is there an all in one tool that will auto convert the audio from E-AC3 to AC3 during the blu ray conversion? BDtoAVCHD does not work with such audio, i believe it uses eac3to tool but always fails. HandBrake works however it always makes the video portion worst.