Hello,
I am working on a live stream pipeline from IP Cameras to web clients using
DASH.
I run on demand FFmpeg to convert the RTSP stream from IP cameras, generate
dash chunks and upload to my media server through HTTP and then serve the feed
to my web clients.
Everything works well but unfortunately the first MPD file is generated after
4-5 seconds slowing down the entire video pipeline (I see the video after about
7-8s from when I request it)
Here is the command:
ffmpeg \
-rtsp_transport tcp -i rtsp://172.25.99.200/axis-media/media.amp \
-an -c:v libx264 -pix_fmt yuv420p -b:v 2048k -bufsize 4096k -tune
zerolatency -preset ultrafast \
-fflags +genpts -f dash -format_options
movflags=+empty_moov+default_base_moof+frag_keyframe \
-tune zerolatency -seg_duration 1 -frag_duration 0.2 -use_timeline 1
-use_template 1 -streaming 1 \
http://localhost:8000/live/mystream/start.mpd
So here the question, is there a way to get the manifest earlier? Basically
what I observe is that FFmpeg generates the init file, then the first chunk and
when the chunk is done, it will generated the MPD.
Unfortunately this will take at least 4s regardless the seg_duration.
I am asking since I don't understand if this lag is needed or just the way the
code is implemented.
Thanks!
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