fix unsane etc

patches/go-vod-sheepflix.patch

@@ -123,3 +123,18 @@ diff --git a/transcoder/stream.go b/transcoder/stream.go
  		scaler = "scale_vaapi"
  		scalerArgs = append(scalerArgs, "format=nv12")
  	} else if CV == ENCODER_NVENC {
+@@ -509,6 +517,13 @@ func (s *Stream) transcodeArgs(startAt float64, isHls bool) []string {
+ 	// Audio output specs
+ 	args = append(args, []string{
+ 		"-map", "0:a:0?",
+ 		"-c:a", "aac",
++		// ffmpeg decodes AC-3/DTS 5.1 as layout "5.1(side)", which the AAC
++		// encoder cannot express as a standard channel_configuration, so it
++		// emits a PCE and sets channel_configuration=0. hls.js does not parse
++		// the PCE, writes channelCount=0 into the fMP4 init segment, and every
++		// browser then rejects the audio SourceBuffer. Restricting to standard
++		// layouts maps 5.1(side) -> 5.1 and leaves mono/stereo untouched.
++		"-af", "aformat=channel_layouts=mono|stereo|5.1",
+ 	}...)
+ 
+ 	return args