Transcode AAC to OPUS

[spawn451]

Is it possible using /example/transcoder/main.go
to keep the h264 video codec and transcode AAC to OPUS ?
I tried this :
cmd := exec.CommandContext(ctx, "ffmpeg", "-flags", "low_delay", "-analyzeduration", "1", "-fflags", "-nobuffer", "-probesize", "1024k", "-f", "mpegts", "-i", "-", "-vcodec", "libx264", "-preset", "ultrafast", "-bf", "0", "-f", "mpegts", "-max_muxing_queue_size", "400", "-pes_payload_size", "0", "-acodec", "libopus", "-b:a", "128k", "pipe:1")

but demuxer error : new codec data [] invalid PMT

[spawn451]

Ok find out that OPUS not supported in ts :/