[FFmpeg-user] HLS issue

[Jamey Kirby]

I'm using 5.1.6 on Debian


On Fri, Nov 29, 2024 at 11:29 AM Jamey Kirby <jkirby at whupfm.org> wrote:

> I am a developer of a PWA streaming app for our radio station. I am using
> FFmpeg to create the live HLS stream. It works great except when the source
> goes down. FFmpeg never updates the .m3u8 or .ts files when the source
> returns online. It just keeps streaming the same old files over and over
> again.
>
> If I switch to using an ICY server, everything works as expected.
>
> We want to use HLS. Here is how I am using FFmpeg in my script:
>
> #!/bin/bash
>
> # Configuration
> # STREAM_URI="http://audio-ice2.ibiblio.org:8000/whup-128k"
> STREAM_URI="tcp://0.0.0.0:54321?listen"
> HLS_DIRECTORY="/var/www/whupfm.media/html/hls"
> HLS_SEGMENT_TIME=2
> HLS_LIST_SIZE=3
> HLS_DELETE_THRESHOLD=4
> RETRY_INTERVAL=2
>
> # Metadata
> METADATA_HIGH="WHUP 104.7 FM Live Stream (192k)"
> METADATA_MID="WHUP 104.7 FM Live Stream (128k)"
> METADATA_LOW="WHUP 104.7 FM Live Stream (64k)"
>
> # The cleanup function is to be called on script exit.
> cleanup() {
>   echo "$(date) - Cleaning up HLS files..."
>   find "${HLS_DIRECTORY}" -type f \( -name '*.ts' -o -name '*.m3u8' \)
> -delete
> }
>
> cleanup_on_exit() {
>   echo "$(date) - Exiting script..."
>   cleanup
> }
>
> # Clear the HLS working directory. The folder may have contents
> # if the system loses power or there is a kernel exception
> # resulting in the trap not being called.
> cleanup
>
> # Trap signals to run the cleanup function on script exit.
> trap cleanup_on_exit SIGINT SIGTERM EXIT
>
> while true
> do
>   # Run FFmpeg.
>   echo "$(date) - Starting FFmpeg..."
>
>   ffmpeg -v quiet -loglevel error -f mp3 -i "${STREAM_URI}" -ar 44100 -ab
> 192k \
>     -reconnect 1 -reconnect_streamed 1 -reconnect_at_eof 1
> -reconnect_delay_max 2 \
>     -rw_timeout 4000000 \
>     -map 0 -c:a copy            -metadata title="${METADATA_HIGH}"
> -strftime 1 -f hls -hls_allow_cache 0 -hls_start_number_source datetime
> -hls_flags delete_segments+append_list -hls_time "${HLS_SEGMENT_TIME}"
> -hls_list_size "${HLS_LIST_SIZE}" -hls_delete_threshold
> ${HLS_DELETE_THRESHOLD} -hls_segment_filename
> "${HLS_DIRECTORY}/high_%Y%m%d%H%M%S.ts" "${HLS_DIRECTORY}/high.m3u8" \
>     -map 0 -c:a aac -b:a "128k" -metadata title="${METADATA_MID}"
>  -strftime 1 -f hls -hls_allow_cache 0 -hls_start_number_source datetime
> -hls_flags delete_segments+append_list -hls_time "${HLS_SEGMENT_TIME}"
> -hls_list_size "${HLS_LIST_SIZE}" -hls_delete_threshold
> ${HLS_DELETE_THRESHOLD} -hls_segment_filename
> "${HLS_DIRECTORY}/mid_%Y%m%d%H%M%S.ts"  "${HLS_DIRECTORY}/mid.m3u8" \
>     -map 0 -c:a aac -b:a "64k"  -metadata title="${METADATA_LOW}"
>  -strftime 1 -f hls -hls_allow_cache 0 -hls_start_number_source datetime
> -hls_flags delete_segments+append_list -hls_time "${HLS_SEGMENT_TIME}"
> -hls_list_size "${HLS_LIST_SIZE}" -hls_delete_threshold
> ${HLS_DELETE_THRESHOLD} -hls_segment_filename
> "${HLS_DIRECTORY}/low_%Y%m%d%H%M%S.ts"  "${HLS_DIRECTORY}/low.m3u8"
>
>   echo "$(date) - FFmpeg stopped."
>   cleanup
>   sleep 2
> done
>
> # There's no need for an explicit cleanup call because of a trap.
>
>
> -- Jamey
>
>
>