Trying to loop a playlist in folder with ffmpeg - bash

Question

When trying to play all of *.mp4 files in the folder, and then repeat it from the first video again, i get this error:
start_betterme_playlist: line 35: 25659 Killed ffmpeg $SOURCE -filter_complex "$filter" -map "[v]" -map "[a]" -deinterlace -vcodec libx264 -pix_fmt yuv420p -preset $QUAL -r $FPS -g $(($FPS * 2)) -b:v $VBR -acodec libmp3lame -ar 44100 -threads 6 -qscale 3 -b:a 712000 -bufsize 512k -f flv "$YOUTUBE_URL/$KEY"
The code is - Does anybody maybe know how to fix that problem, i really would like to have this multiple videos played on the stream contiounsly. Thanks in advance!
#! /bin/bash
VBR="2500k"
FPS="30"
QUAL="medium"
YOUTUBE_URL="rtmp://live.twitch.tv/app/"
FOLDER="videos"
KEY="live_16xxxxxxxxxxx_xxxvO7C"
SOURCE=""
n=0
filter=""
for f in $FOLDER/*.mp4
do
SOURCE="$SOURCE -i $f"
filter="$filter [$n:v:0] [$n:a:0]"
((n++))
done
filter="$filter concat=n=$n:v=1:a=1 [v] [a]"
echo "ffmpeg $SOURCE -filter_complex '$filter'"
ffmpeg \
$SOURCE -filter_complex "$filter" \
-map "[v]" -map "[a]" -deinterlace \
-vcodec libx264 -pix_fmt yuv420p -preset $QUAL -r $FPS -g $(($FPS * 2)) -b:v $VBR \
-acodec libmp3lame -ar 44100 -threads 6 -qscale 3 -b:a 712000 -bufsize 512k \
-f flv "$YOUTUBE_URL/$KEY"

Answer 1

You can use ffmpeg's built in playlist feature:
Create a playlist of all mp4 files in your directory (you can use a filler-video between the videos)
Use playlist as input for ffmpeg (edit ffmpeg commands to taste. I created a multicast stream that can be easily tested locally)
here is a simple shell script:
#!/bin/bash
# create playlist from all .mp4 and play in loop
playlist="playlist.txt"
# create/reset playlist file
echo "#ffmpeg playlist" > ${playlist}
# this video goes in between two video files
use_filler="true" # activate filler with "true". Use "false" or any other string to deactivate filler.
filler="filler.mp4"
# create playlist for ffmpeg from all videos in the current directory
for f in *.mp4;do
# exclude filler from playlist
if [ "${f}" != "${filler}" ]; then
echo "file '${f}'" >> ${playlist}
# if activated add filler after every video file
if [[ "${use_filler}" = "true" ]]; then # This condition is false for anything but the literal string "true".
echo "file '${filler}'" >> ${playlist}
fi
fi
done
# stream playlist immediately with ffmpeg
ffmpeg -f concat -safe 0 -stream_loop -1 \
-i "${playlist}" \
-c copy \
-f mpegts \
"udp://239.253.253.1:1234?pkt_size=1384"
Playback with ffplay...
ffplay udp://239.253.253.1:1234
...or VLC:
udp://#239.253.253.1:1234