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• Spring content + MPD manifest and Dash.js player [closed]

  31 octobre 2024, par Iupa

  I'm total newbie to video content from web, however I was curious how those things work actually, and I found so far that for web pages there are already js libs which firstly customize the video html tag to support many features like resolution/subtitles/speed etc,secondly they work with specific manifest file as a src for video, it's *.mpd extension and xml format where is described how to play the chunks of video, now in order to generate such manifests I need another libs like ffmpeg that can generate not only manifests but the chunks as well in different resolutions and other tons of settings (kinda crazy ¯_(ツ)_/¯), anyway now I understood that in order to use spring content lib I need to generate all of those during the uploads of files, are there some tutorials/best practices for such ?

  


• MPD MPEG-DASH - Shows only one bitrate

  13 août 2018, par Justin Rec

  Help. I wont show bitrate.
  player.getBitrateInfoListFor("video") ;
  Shows only one bitrate - 454948

  manifest.mpd generated by GPAC

   <period duration="PT0H21M48.338S">
  
    <adaptationset segmentalignment="true" group="1" maxwidth="270" maxheight="480" maxframerate="2070000/93437" par="270:480" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.640015" width="270" height="480" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="454948">
  
      <segmenttemplate media="480_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="480_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" group="1" maxwidth="202" maxheight="360" maxframerate="2070000/93437" par="202:360" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.64000D" width="202" height="360" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="281508">
  
      <segmenttemplate media="360_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="360_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" group="1" maxwidth="134" maxheight="240" maxframerate="2070000/93437" par="134:240" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.64000B" width="134" height="240" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="182832">
  
      <segmenttemplate media="240_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="240_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" group="1" maxwidth="80" maxheight="144" maxframerate="2070000/93437" par="80:144" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.640009" width="80" height="144" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="99667">
  
      <segmenttemplate media="144_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="144_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" lang="und">
  
     <representation mimetype="audio/mp4" codecs="mp4a.40.2" startwithsap="1" bandwidth="66056">
  
      <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="1"></audiochannelconfiguration>
  
      <segmenttemplate media="audio_bbb/segment__track2_$Number$.m4s" timescale="48000" startnumber="1" duration="192000" initialization="audio_bbb/segment__track2_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
   </period>

  player.getBitrateInfoListFor("video") ;
  Shows only one bitrate - 454948

• How to finalize LL-DASH stream MPD file using Shaka Packager [closed]

  11 août, par Arjit

  I'm using Shaka Packager with FFmpeg piping to produce LL-DASH live streams from an NGINX-RTMP input. Streaming works fine, but when the publisher stops streaming, Shaka Player continuously trying to fetch & throws 404 errors for segment files that don’t exist.

  


  For example, if the last segment is 29.m4s, the player still tries to fetch :

  


  GET http://localhost:8080/dash/stream/480p_30.m4s 404 (Not Found)
GET http://localhost:8080/dash/stream/720p_31.m4s 404 (Not Found)


  


  Even though the stream ended at segment 29.

  


  Shaka-packager :

  


  "$SHAKA_PACKAGER_BIN" \
  "in=${VIDEO_720P_FIFO},stream=video,format=mp4,init_segment=${STREAM_OUTPUT_DIR}/720p_init.mp4,segment_template=${STREAM_OUTPUT_DIR}/720p_\$Number\$.m4s,bandwidth=3000000,hls_name=720p" \
  "in=${VIDEO_480P_FIFO},stream=video,format=mp4,init_segment=${STREAM_OUTPUT_DIR}/480p_init.mp4,segment_template=${STREAM_OUTPUT_DIR}/480p_\$Number\$.m4s,bandwidth=1500000,hls_name=480p" \
  "in=${AUDIO_FIFO},stream=audio,format=mp4,init_segment=${STREAM_OUTPUT_DIR}/audio_init.mp4,segment_template=${STREAM_OUTPUT_DIR}/audio_\$Number\$.m4s,bandwidth=128000,hls_name=audio" \
  --hls_master_playlist_output "${STREAM_OUTPUT_DIR}/master.m3u8" \
  --hls_playlist_type LIVE \
  --mpd_output "${STREAM_OUTPUT_DIR}/manifest.mpd" \
  --io_block_size 65536 \
  --segment_duration 2 \
  --low_latency_dash_mode=true \
  --utc_timings "urn:mpeg:dash:utc:http-xsdate:2014=http://time.akamai.com/?iso" \
  --min_buffer_time 1 \
  --time_shift_buffer_depth 60 \
  --hls_start_time_offset -2 \
  --preserved_segments_outside_live_window 10


  


  FFMPEG :

  


  ffmpeg -y -re -i "rtmp://localhost:1935/live/${STREAM_KEY}" \
-filter_complex \
"[0:v]split=2[v720][v480]; \
[v720]scale=w=1280:h=720,setsar=1[v720out]; \
[v480]scale=w=854:h=480,setsar=1[v480out]; \
[0:a]aresample=44100[aout]" \
\
-map "[v720out]" -c:v libx264 -b:v 3000k -maxrate 3000k -bufsize 6000k -preset veryfast -tune zerolatency -g 60 -keyint_min 60 -sc_threshold 0 \
-movflags empty_moov+default_base_moof -frag_duration 2000000 -f mp4 ${VIDEO_720P_FIFO} \
-map "[v480out]" -c:v libx264 -b:v 1500k -maxrate 1500k -bufsize 3000k -preset veryfast -tune zerolatency -g 60 -keyint_min 60 -sc_threshold 0 \
-movflags empty_moov+default_base_moof -frag_duration 2000000 -f mp4 ${VIDEO_480P_FIFO} \
-map "[aout]" -c:a aac -b:a 128k \
-movflags empty_moov+default_base_moof -frag_duration 2000000 -f mp4 ${AUDIO_FIFO} \
-loglevel info -stats


  


  To finalize the stream, I have a script that :

  


  

  • Waits for segments to stop being created

  


  • Sends SIGINT to FFmpeg and Shaka Packager

  


  • Manually appends #EXT-X-ENDLIST to HLS playlists

  


  


  Here’s a simplified version of the finalization logic :

  


  #!/bin/bash
exec >> /output/debug.log 2>&1

STREAM_KEY="$1"

FFMPEG_PID_FILE="/output/${STREAM_KEY}_transcoder.pid"
SHAKA_PID_FILE="/output/${STREAM_KEY}_packager.pid"

VIDEO_720P_FIFO="/output/video_720p.pipe"
VIDEO_480P_FIFO="/output/video_480p.pipe"
AUDIO_FIFO="/output/audio.pipe"

HLS_PLAYLISTS_DIR="/output/${STREAM_KEY}"

LAST_COUNT=-1
STABLE_COUNT=0
MAX_STABLE=5  # 5 seconds of no new segments

while true; do
    CURRENT_COUNT=$(ls ${STREAM_OUTPUT_DIR}/*.m4s 2>/dev/null | wc -l)
    if [ "$CURRENT_COUNT" -eq "$LAST_COUNT" ]; then
        STABLE_COUNT=$((STABLE_COUNT + 1))
    else
        STABLE_COUNT=0
    fi

    if [ "$STABLE_COUNT" -ge "$MAX_STABLE" ]; then
        echo "No new segments for $MAX_STABLE seconds, safe to finalize."
        break
    fi

    LAST_COUNT=$CURRENT_COUNT
    sleep 1
done

# Stop Shaka Packager
if [ -f "$SHAKA_PID_FILE" ]; then
    SHAKA_PID=$(cat "$SHAKA_PID_FILE")
    kill -INT $SHAKA_PID
    echo "Waiting for Shaka Packager process $SHAKA_PID to finish..."
    while kill -0 $SHAKA_PID > /dev/null 2>&1; do
        sleep 1
    done
    echo "$(date): Killed Shaka Packager PID $SHAKA_PID"
    rm -f "$SHAKA_PID_FILE"
fi

# Stop FFmpeg transcoder if still running
if [ -f "$FFMPEG_PID_FILE" ]; then
    FFMPEG_PID=$(cat "$FFMPEG_PID_FILE")
    # kill -SIGINT $FFMPEG_PID
    kill -9 $FFMPEG_PID
    echo "Waiting for FFmpeg process $SHAKA_PID to finish..."
    while kill -0 $FFMPEG_PID > /dev/null 2>&1; do
        sleep 1
    done

    echo "$(date): Killed FFmpeg PID $FFMPEG_PID"
    rm -f "$FFMPEG_PID_FILE"
fi




for playlist in "$HLS_PLAYLISTS_DIR"/*.m3u8; do
    if [[ "$(basename "$playlist")" != "master.m3u8" ]]; then
        echo "#EXT-X-ENDLIST" >> "$playlist"
    fi
done

rm -f "$VIDEO_720P_FIFO" "$VIDEO_480P_FIFO" "$AUDIO_FIFO"

echo "$(date): Finalization complete for stream $STREAM_KEY."



  


  shaka-packager wait infinitely when i am sending INT/TERM.

  


  Question :

  


  

  • Why doesn't Shaka Packager finalize the LL-DASH MPD manifest when
receiving SIGINT ?

  


  • Is there a way to tell Shaka Packager to write the final segments and
set availabilityEndTime without switching to VOD mode ?

  


  • Should I be doing something manually to flush the last segments or
finalize the MPD, similar to #EXT-X-ENDLIST in HLS ?

  


  


  I only want to gracefully end the stream so Shaka Player doesn't try to fetch non-existent segments, without switching the stream to VOD mode.