Video speed up when playing with custom websocket

[Petingo]

Hello and happy new year!

I'm trying to stream .ts file with my own WebSocket, but the video would speed up for like 1.5x when playing in the browser.
I use this command to generate video segments, and I have another program that detects if there's any newly available sequence and writes to the WebSocket.

ffmpeg -y -re \
-f v4l2 \
    -video_size 640x480 -i /dev/video0 \
-f alsa \
                -ar 44100 -i hw:0 \
        -f mpegts \
                -codec:v mpeg1video -s 640x480 -b:v 1000k -bf 0 \
                -codec:a mp2 -b:a 128k \
                -muxdelay 0.001 \
-f hls \
    -hls_time 5 \
    -hls_playlist_type vod \
    -hls_flags independent_segments \
    -hls_segment_type mpegts \
    -hls_segment_filename stream_%v/data%02d.ts \
test

I also tried to use a fixed framerate (ffmpeg -r 25 with -f v4l2 -framerate 25) but the situation is the same.
Since the video is generated on the fly, so the behaviour would be like:
[play seq0 at very fast speed] - [wait for seq1 ( for like 1.5s ) ] - [play seq1 for very fast speed] - [wait for seq2]

I wonder if this happens due to the same reason as #184 (which I also experience). Does anyone know any potential solution (or any alternative)?

p.s.
When I run the websocke example in the README, everything works fine.