CasparCG/server

Bug: Mono wav file plays out of channel 3

Julusian opened this issue · 2 comments

Julusian commented

Observed Behavior

Since 2.4.0 RC1, a mono wav file will play out on sdi channel 3. This looks to be the center channel in a 5.1/7.1 setup

This is not the case in 2.4.0 Beta1.

Expected behaviour

A mono wav file should play out of channel 1 (or both 1 and 2?). Check previous versions to determine exact expected behaviour

Steps to reproduce

  3. ...

Environment

  • Commit: 2.4.0-RC1
  • Server version: 2.4.0-RC1
  • Operating system: Ubuntu 22.04
4l4R1 commented

Maybe related.
Strange things happened when using the FFmpeg PAN filter

2.4.0.RC1
Playing stereo file with sound in 1 channel
filter: AF "pan=8c|c0=c0|c1=c1|c2=c0|c3=c1|c4=c0|c5=c1|c6=c0|c7=c1"
audio from channel 1 plays to channels 1, 3, 4, 7
audio from channel 2 plays to channels 2, 5, 8

Julusian commented

I believe this is fixed now. By telling ffmpeg we accept any number of audio channels up to 16, it appears to have stopped attempting to remap/downmix/upmix the audio for us