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• 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.

  


• live video streaming not playing on dash.js player using ffmpeg, nginx-rtmp in raspberry pi

  15 août 2016, par sparks

  I am trying to stream a live video from raspberry pi & pi camera module to web browser.But the video doesn’t play.I am using Nginx-rtmp and ffmpeg to process the video. On the client side i use dash js player trying to play the video but no luck.I see the warning on the terminal

  [flv @ 0x2c3b950] Failed to update header with correct duration.
[flv @ 0x2c3b950] Failed to update header with correct filesize.

  But i am not sure if this could be the issue. Anybody knows what might be wrong ?I don’t expect a straight answer but i am sure somebody can guide me in the right direction. Thank you in advance. Here is my set up

  Nginx.conf

  events {
  
    worker_connections  1024;
  
   }
  
  
  
  
  
   http     {
  
          include       mime.types;
  
          default_type  application/octet-stream;
  
  
  
  
  
  sendfile        on;
  
  
  
  keepalive_timeout  65;
  
  
  
  server {
  
      listen       80;
  
      server_name 192.168.1.114 localhost;
  
      location / {
  
          root   /var/www;
  
          index  index.html index.htm;
  
      }
  
  
  
  
  
      location /dash {
  
          root /var/www;
  
          add_header Cache-Control no-cache;
  
      }
  
  
  
       location /dash.js{
  
          root /var/www;
  
        }
  
  
  
       location /hls {
  
         types {
  
          application/vnd.apple.mpegurl m3u8;
  
          video/mp2t ts;
  
        }
  
  
  
        root /var/www;
  
        index index.html;
  
        add_header Cache-Control no-cache;
  
      }
  
  
  
      location /rtmpcontrol{
  
          rtmp_control all;
  
       }
  
  
  
      location /rtmpstat{
  
          rtmp_stat all;
  
       }
  
  
  
      #error_page  404              /404.html;
  
  
  
  
  
             error_page   500 502 503 504  /50x.html;
  
      location = /50x.html {
  
          root   html;
  
      }
  
  
  
         }
  
   rtmp {
  
     server {
  
      listen 1935;
  
  
  
      chunk_size 4000;
  
  
  
      application rtmp {
  
          live on;
  
          hls on;
  
          dash on;
  
          dash_path /var/www/dash;
  
          hls_path /var/www/hls;
  
      }
  
    }
  
  }

  baseline.html

      
  
      
  
      
  
      
  
  
  
      
  
      
  
  
  
      
  
      
  
  
  
      
  
      <code class="echappe-js">&lt;script src='http://stackoverflow.com/feeds/tag/dash.all.js'&gt;&lt;/script&gt;
  &lt;script&gt;<br />
  
          function getUrlVars() {<br />
  
              var vars = {};<br />
  
              var parts = window.location.href.replace(/[?&amp;amp;]+([^=&amp;amp;]+)=([^&amp;amp;]*)/gi, function(m,key,value) {<br />
  
                  vars[key] = value;<br />
  
              });<br />
  
              return vars;<br />
  
          }<br />
  
  <br />
  
          function startVideo() {<br />
  
              var vars = getUrlVars(),<br />
  
                  url = &quot;http://192.168.1.114:80/dash/stream.mpd&quot;,<br />
  
                  video,<br />
  
                  context,<br />
  
                  player;<br />
  
  <br />
  
              if (vars &amp;amp;&amp;amp; vars.hasOwnProperty(&quot;url&quot;)) {<br />
  
                  url = vars.url;<br />
  
              }<br />
  
  <br />
  
              video = document.querySelector(&quot;.dash-video-player video&quot;);<br />
  
              context = new Dash.di.DashContext();<br />
  
              player = new MediaPlayer(context);<br />
  
  <br />
  
              player.startup();<br />
  
  <br />
  
              player.attachView(video);<br />
  
              player.setAutoPlay(false);<br />
  
  <br />
  
              player.attachSource(url);<br />
  
          }<br />
  
      &lt;/script&gt;
      &lt;body onload=&quot;startVideo()&quot;&gt;
  
              
          
  

  How i grab and push video stream

   raspivid -w 640 -h 480 -fps 25 -t 0 -b 1800000 -o - | ffmpeg -y -f h264 -i - -vcodec libx264  -f flv -rtmp_buffer 100 -rtmp_live live rtmp://localhost:1935/rtmp/stream

  When i run the above command, i see the following on the terminal

      ffmpeg version N-81256-gd3426fb Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
    configuration: --enable-gpl --enable-libx264 --enable-nonfree
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 51.100 / 57. 51.100
  
    libavformat    57. 44.100 / 57. 44.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 49.100 /  6. 49.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, h264, from 'pipe:':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p, 640x480, 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  [tcp @ 0x2c3c850] Connection to tcp://localhost:1935 failed (Connection refused), trying next address
  
  [libx264 @ 0x2c50d80] using cpu capabilities: ARMv6 NEON
  
  [libx264 @ 0x2c50d80] profile High, level 3.0
  
  [libx264 @ 0x2c50d80] 264 - core 148 r2705 3f5ed56 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [flv @ 0x2c3b950] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, flv, to 'rtmp://localhost:1935/rtmp/stream':
  
    Metadata:
  
      encoder         : Lavf57.44.100
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 640x480, q=-1--1, 25 fps, 1k tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc57.51.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  ^Cmmal: Aborting program.0 size=     930kB time=00:00:45.44 bitrate= 167.7kbits/s speed=1.03x     
  
  
  
  [flv @ 0x2c3b950] Failed to update header with correct duration.
  
  [flv @ 0x2c3b950] Failed to update header with correct filesize.
  
  frame= 1197 fps= 26 q=-1.0 Lsize=     976kB time=00:00:47.76 bitrate= 167.5kbits/s speed=1.04x    
  
  video:953kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.484349%
  
  [libx264 @ 0x2c50d80] frame I:5     Avg QP:18.91  size:  3600
  
  [libx264 @ 0x2c50d80] frame P:299   Avg QP:21.38  size:  1486
  
  [libx264 @ 0x2c50d80] frame B:893   Avg QP:20.62  size:   574
  
  [libx264 @ 0x2c50d80] consecutive B-frames:  0.4%  0.0%  1.0% 98.6%
  
  [libx264 @ 0x2c50d80] mb I  I16..4: 10.1% 87.1%  2.8%
  
  [libx264 @ 0x2c50d80] mb P  I16..4:  3.8%  7.4%  0.0%  P16..4: 34.2%  2.1%  1.5%  0.0%  0.0%    skip:51.0%
  
  [libx264 @ 0x2c50d80] mb B  I16..4:  0.2%  0.3%  0.0%  B16..8: 20.1%  0.4%  0.0%  direct: 3.8%  skip:75.1%  L0:48.6% L1:50.9% BI: 0.6%
  
  [libx264 @ 0x2c50d80] 8x8 transform intra:68.1% inter:97.0%
  
  [libx264 @ 0x2c50d80] coded y,uvDC,uvAC intra: 10.1% 27.5% 1.8% inter: 2.0% 12.9% 0.1%
  
  [libx264 @ 0x2c50d80] i16 v,h,dc,p: 18% 20%  9% 53%
  
  [libx264 @ 0x2c50d80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 11% 58%  2%  2%  1%  2%  1%  1%
  
  [libx264 @ 0x2c50d80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 26% 30%  3%  4%  4%  6%  2%  2%
  
  [libx264 @ 0x2c50d80] i8c dc,h,v,p: 66% 18% 15%  1%
  
  [libx264 @ 0x2c50d80] Weighted P-Frames: Y:1.7% UV:1.3%
  
  [libx264 @ 0x2c50d80] ref P L0: 58.2%  2.2% 25.5% 14.1%  0.1%
  
  [libx264 @ 0x2c50d80] ref B L0: 81.7% 13.3%  5.0%
  
  [libx264 @ 0x2c50d80] ref B L1: 93.6%  6.4%
  
  [libx264 @ 0x2c50d80] kb/s:162.87
  
  Exiting normally, received signal 2.

  On my var/www/dash directory

   stream-0.m4a  stream-19200.m4a  stream-29200.m4a  
  
   stream-9600.m4a    stream-init.m4a  stream.mpd      stream-raw.m4v
  
   stream-0.m4v  stream-19200.m4v  stream-29200.m4v  stream-9600.m4v    stream-init.m4v  stream-raw.m4a

• Using a HLS m3u8 or DASH mpd as ffmpeg input : seeking performance

  21 septembre 2020, par coder_uk

  I wonder if any FFMPEG wizards can help with this :

  


  I've seen examples (like FFmpeg code not working on http url for thumbnail extraction) of using a http URL as the input but so far only with an .mp4.

  


  If I were to instead use an ABR .m3u8/.mpd as the input (which, though a text file, does represent a video) ... is FFMPEG smart enough to work with it ? To parse it ? So ... if I gave it a 5 hour HLS VOD m3u8 as input (-i http...), and asked it for a frame at 4 hours in (-ss), would it only download that one 10s segment at the 4-hours point ? And so only need to download a small 10 second .ts file. Or does it download the whole thing ?

  


  Thanks.