+- Selur's Little Message Board (https://forum.selur.net)
+-- Forum: Hybrid - Support (https://forum.selur.net/forum-1.html)
+--- Forum: Problems & Questions (https://forum.selur.net/forum-3.html)
+--- Thread: [BUG] Opus output audio cannot be mono? (/thread-1916.html)
Opus output audio cannot be mono? - TheJ - 30.07.2021
Every time i try to encode the audio to opus mono but it always outputs to stereo no matter what, i tried doing the same thing but with ffmpeg and it works fine. Help..?
RE: Opus output audio cannot be mono? - Selur - 30.07.2021
No debug output, no details, nothing to say from ne.
RE: Opus output audio cannot be mono? - TheJ - 30.07.2021
(30.07.2021, 04:04)Selur Wrote: No debug output, no details, nothing to say from ne.
sent you a pm
RE: Opus output audio cannot be mono? - Selur - 30.07.2021
Looking at the debug output and the encoding call:
ffmpeg -y -threads 8 -loglevel fatal -nostdin -i "C:\Users\djoens\AppData\Local\Temp\iId_3_aid_0_lang_en_2021-07-30@09_46_42_1810_01.aac" -ac 2 -ar 44100 -f sox - | sox --multi-threaded --temp "C:\Users\djoens\AppData\Local\Temp\2021-07-30@09_46_42_181001" --buffer 524288 -S -t sox - -t flac - | opusenc --bitrate 12 --comp 10 --framesize 20 --expect-loss 0 --max-delay 1000 --ignorelength - "C:\Users\djoens\AppData\Local\Temp\iId_3_aid_0_lang_en_2021-07-30@09_46_42_1810_02.opus"-> I can reproduce the issue and will look into it after work today.
Cu Selur
RE: Opus output audio cannot be mono? - TheJ - 30.07.2021
(30.07.2021, 05:00)Selur Wrote: Looking at the debug output and the encoding call:
the downmix is missing in the 'sox'-part of the call.ffmpeg -y -threads 8 -loglevel fatal -nostdin -i "C:\Users\djoens\AppData\Local\Temp\iId_3_aid_0_lang_en_2021-07-30@09_46_42_1810_01.aac" -ac 2 -ar 44100 -f sox - | sox --multi-threaded --temp "C:\Users\djoens\AppData\Local\Temp\2021-07-30@09_46_42_181001" --buffer 524288 -S -t sox - -t flac - | opusenc --bitrate 12 --comp 10 --framesize 20 --expect-loss 0 --max-delay 1000 --ignorelength - "C:\Users\djoens\AppData\Local\Temp\iId_3_aid_0_lang_en_2021-07-30@09_46_42_1810_02.opus"
-> I can reproduce the issue and will look into it after work today.
Cu Selur
Another question if you don't mind, i cant seem to get opus all the way down to 6kbps. I've seen handbrake do this and why can't Hybrid? Thanks.
RE: Opus output audio cannot be mono? - Selur - 30.07.2021
Quote:I've seen handbrake do this and why can't HybridThat'S a bug, normally it should allow 6-256kBit/s per Channel, so for mono 6kBit/s should be possible.
-> will look into it
Cu Selur
RE: Opus output audio cannot be mono? - Selur - 30.07.2021
Okay, found the problem, a typo caused the 'Mono'-downMix to be ignored, thus there was no downMix and and the bit rate limits weren't adjusted.
-> send you a link to a dev version via pm which should fix the issue, so once 'DownMix' is set to 'Mono' (or a mono source is loaded) opus should allow to set a bit rate of 6kBit/s.
Cu Selur