What command line options for ffmpeg for separate audio and video output to dynamically set devices for streaming

beyondtime

5/18/23, 11:09 AM

Is there an useful way within Ubuntu OS from command line for separation of video and audio for streaming. For video being streamed to a network port (client media player connecting through udp://, tcp://, http://) and audio being redirected to varying (local) hardware devices (listed by aplay -l)?
(If served with one input for ffmpeg all video and audio streams should start synchronized, AFAIK.)
Can audio output devices be changed dynamically for redirection between audio hardware connected?

ffmpeg-suite would be the preferred tool on this installed OS (other options are mplayer, mencoder).

Following redirected audio to local stdout pipe for ffplay, but had increased delay to media player from udp streaming port:
media upstream: ffmpeg -i h264x_mp3.mp4 -preset fast -vcodec libx264 -f mpeg -map 0:v udp://localhost:port -map 0:a:0 -f mp3 - | ffplay -nodisp -i -
downstream client: mplayer udp://localhost:port

this example plays audio locally and should transfer a video stream over a named pipe, but connecting to named pipe does not show video output on media player client:
media server: mplayer -ao alsa,device=hw=0.0 -vo mpegpes:namedpipe
media client: mplayer -ao none namedpipe

0 + 0

sound

video

ffmpeg

streaming

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: What command line options for ffmpeg for separate audio and video output to dynamically set devices for streaming

TH: ตัวเลือกบรรทัดคำสั่งใดสำหรับ ffmpeg สำหรับเอาต์พุตเสียงและวิดีโอแยกต่างหากเพื่อตั้งค่าอุปกรณ์สำหรับการสตรีมแบบไดนามิก

RO: Ce opțiuni de linie de comandă pentru ffmpeg pentru ieșire audio și video separată pentru a seta în mod dinamic dispozitivele pentru streaming

RU: Какие параметры командной строки для ffmpeg для отдельного вывода звука и видео для динамической настройки устройств для потоковой передачи

VI: Tùy chọn dòng lệnh nào cho ffmpeg cho đầu ra âm thanh và video riêng biệt để thiết lập động các thiết bị phát trực tuyến

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