Author Topic: Extracted ac3 audio tracks are recognised as eac3  (Read 1008 times)

vangelis

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Extracted ac3 audio tracks are recognised as eac3
« on: June 27, 2017, 04:12:05 PM »
Hi there,

I'm using Avidemux2.6.20 (MacBook pro, macOS 10.12.5) to extract ac3 audio tracks from one movie and remux into another. Initially the audio track is recognised by Avidemux as ac3 file.

However when I try to import it back using Audio>Select Track, the same extracted ac3 file now is been recognised wrongly as e-ac3.

I have attached a screenshot to demonstrate the problem and mediainfo report below.

Complete name                            : Movies/test.ac3
Format                                   : AC-3
Format/Info                              : Audio Coding 3
File size                                : 379 MiB
Duration                                 : 1 h 58 min
Overall bit rate mode                    : Constant
Overall bit rate                         : 448 kb/s

Audio
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Format settings, Endianness              : Big
Duration                                 : 1 h 58 min
Bit rate mode                            : Constant
Bit rate                                 : 448 kb/s
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 spf)
Bit depth                                : 16 bits
Compression mode                         : Lossy
Stream size                              : 379 MiB (100%)
Service kind                             : Complete Main[/size][/size]

Has anyone else seen the same thing and can suggest a fix?

Many thanks,
Vangelis

mean

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #1 on: June 27, 2017, 05:06:48 PM »
Would need a short sample of the ac3 file
10 sec is enough

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #2 on: June 28, 2017, 07:58:19 AM »
Please see attached file.

Many thanks,
Vangelis

mean

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #3 on: June 29, 2017, 05:21:20 AM »
should work now

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #4 on: June 29, 2017, 05:38:05 AM »
Can't ran Avidemux2.7_r2017_06_29_f132f4b2936 on Sierra 10.12.5. Please see system log error below.

Jun 29 06:30:29 com.apple.xpc.launchd[1] (com.apple.xpc.launchd.oneshot.0x10000011.Avidemux2.7.app[1125]): Service exited with abnormal code: 134

Vangelis

mean

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #5 on: June 29, 2017, 05:39:08 AM »
Maybe you got it while it was uploading
Could you retry downloading it ?

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #6 on: June 29, 2017, 05:46:05 AM »
I tried both builds you have in the OS X_sierra folder. Both give me the same error. Gatekeeper is fully disabled.

mean

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #7 on: June 29, 2017, 05:48:06 AM »
weird
I 've just retried
I'll build it again to see

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #8 on: June 29, 2017, 05:56:45 AM »
Another user reported the same thing.
Please see here: http://avidemux.org/smif/index.php/topic,17755.15.html

.....
I've used the earlier build from the 21st of May (ending in 0c5b), the later two don't seem to open on my system. I get the usual "but it's from the internet" warning, select "Open Anyway" and then nothing happens. Just thought I'd let you know.
.....

mean

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #9 on: June 29, 2017, 06:12:19 AM »
 Could you start it from the command line ?

i.E.
Content/MacOS/Avidemux2.7.app

and post the output ?


vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #10 on: June 29, 2017, 08:04:48 AM »
build Avidemux2.7_r2017_06_29_f132f4b2936 now runs on one machine, will try on another and report back shortly.

Many thanks for all your help.

V

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #11 on: June 29, 2017, 09:35:32 AM »
Hi mean,

build Avidemux2.7_r2017_06_29_f132f4b2936 now runs on sierra 10.12.5-10.12.6 on two separate macs and the external ac3 files are recognised correctly.

Well done mate.

Vangelis

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #12 on: July 04, 2017, 12:06:21 PM »
Hi mean,

On a slightly related issue, I noticed any AAC, 6 channel audio track is recognised incorrectly as 128k. Please could you look into this?

many thanks,
Vangelis

mean

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #13 on: July 04, 2017, 03:06:59 PM »
bitrate for AAC is hard to get, so the value is always set to 128K

vangelis

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Re: Extracted ac3 audio tracks are recognised as eac3
« Reply #14 on: July 05, 2017, 06:23:58 AM »
OK, that makes sense.

PS Please can we have the latest 2.7 nightly optimised for retina screens?