Loss of audio channels

[tmaguire121]

When converting a video file with 6 audio channels, the resulting file is always 2 channels. Is there a reason why you do this? How can I modify the script to use all the channels from the original file?

[Kameecoding]

the script uses handbrake and -a 1,2,3,4,5,6 which should copy the first 6 channels to the output. they might have changed it though. What options do you use?

[tmaguire121]

I have used your default settings, just starting to play with them now. I am noticing this in the log and I'm not sure why I am getting it: "AAC Passthru requested and input codec is not compatible for track 1, using AAC (avcodec) encoder" [10:00:31] libhb: scan thread found 1 valid title(s) + title 1: + stream: C:\Movies\AC3 Dolby digital 5.1ch Sound Test.avi + duration: 00:00:48 + size: 576x432, pixel aspect: 1/1, display aspect: 1.33, 29.970 fps + autocrop: 0/0/0/0 + support opencl: yes + support hwd: no + chapters: + 1: cells 0->0, 0 blocks, duration 00:00:48 + audio tracks: + 1, Unknown (AC3) (5.1 ch) (iso639-2: und), 48000Hz, 448000bps + subtitle tracks: Warning: Could not find audio track '2', skipped Warning: Could not find audio track '3', skipped Warning: Could not find audio track '4', skipped Warning: Could not find audio track '5', skipped Warning: Could not find audio track '6', skipped AAC Passthru requested and input codec is not compatible for track 1, using AAC (avcodec) encoder [10:00:31] 1 job(s) to process I assume that when it re-encodes the audio it is converting it to stereo.

[Kameecoding]

oh so your issue is that it converts 5.1 to 2.0 I thought it loses audio tracks.

you can use this guide to determine your optimal options: https://handbrake.fr/docs/en/latest/cli/cli-guide.html

I think you can replace

'-E','faac,copy:aac', with '-E','faac,copy:aac,copy:ac3,ac3',

and increase bit rate to like 640.

'-B', '160,160', to '-B', '640,448',

[tmaguire121]

Those updates didn't work. I am still playing around with the settings to find the right combo.

…

On Thu, Dec 29, 2016 at 10:46 AM, Andrej Kovac ***@***.***> wrote: oh so your issue is that it converts 5.1 to 2.0 I thought it loses audio tracks. you can use this guide to determine your optimal options: https://handbrake.fr/docs/en/latest/cli/cli-guide.html I think you can replace '-E','faac,copy:aac', with '-E','faac,copy:aac,copy:ac3,ac3', and increase bit rate to like 640. '-B', '160,160', to'-B', '640,448', — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQKMtgEfrmg2bf1XUotogIKprsc01oLJks5rM9XAgaJpZM4LXTMJ> .

[Kameecoding]

Yeah, I realized they might be positional, try moving ac3 ones to the front.

'-E','copy:ac3,ac3,copy:aac,faac',

[tmaguire121]

I just noticed that as well. I did see that one of the audio tracks has the 6 channels while the others have 2.

…

On Thu, Dec 29, 2016 at 12:19 PM, Andrej Kovac ***@***.***> wrote: Yeah, I realized they might be positional, try moving ac3 ones to the front. '-E','copy:ac3,ac3,copy:aac,faac', — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQKMtkfOIf9gJnzQA_Ub80zF6b1TKTJWks5rM-u1gaJpZM4LXTMJ> .

[Kameecoding]

Closing due to inactivity