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• MPEG Dash output generated by FFMPEG not working

  8 janvier 2019, par Anto Joy

  I created a dash output sample_video.mpd file using ffmpeg, but when I tried to play it using dash js the video was just loading and nothing else.
  Below is the generated mpd file

  <?xml version="1.0" encoding="utf-8"?>
  
  <mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT1M2.3S" minbuffertime="PT20.0S">
  
  <programinformation>
  
  </programinformation>
  
  <period start="PT0.0S">
  
      <adaptationset contenttype="video" segmentalignment="true" bitstreamswitching="true" lang="und">
  
          <representation mimetype="video/mp4" codecs="avc1.640015" bandwidth="255520" width="426" height="240" framerate="24/1">
  
              <segmenttemplate timescale="12288" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="3">
  
                  <segmenttimeline>
  
                      <s t="198656" d="69120"></s>
  
                      <s d="75264"></s>
  
                      <s d="174592"></s>
  
                      <s d="122880"></s>
  
                      <s d="125440"></s>
  
                  </segmenttimeline>
  
              </segmenttemplate>
  
          </representation>
  
          <representation mimetype="video/mp4" codecs="avc1.64001e" bandwidth="726596" width="854" height="480" framerate="24/1">
  
              <segmenttemplate timescale="12288" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="3">
  
                  <segmenttimeline>
  
                      <s t="198656" d="69120"></s>
  
                      <s d="75264"></s>
  
                      <s d="174592"></s>
  
                      <s d="122880"></s>
  
                      <s d="125440"></s>
  
                  </segmenttimeline>
  
              </segmenttemplate>
  
          </representation>
  
          <representation mimetype="video/mp4" codecs="avc1.64001f" bandwidth="1433314" width="1280" height="720" framerate="24/1">
  
              <segmenttemplate timescale="12288" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="3">
  
                  <segmenttimeline>
  
                      <s t="198656" d="69120"></s>
  
                      <s d="75264"></s>
  
                      <s d="174592"></s>
  
                      <s d="122880"></s>
  
                      <s d="125440"></s>
  
                  </segmenttimeline>
  
              </segmenttemplate>
  
          </representation>
  
      </adaptationset>
  
      <adaptationset contenttype="audio" segmentalignment="true" bitstreamswitching="true" lang="und">
  
          <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="341000" audiosamplingrate="48000">
  
              <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="6"></audiochannelconfiguration>
  
              <segmenttemplate timescale="48000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="3">
  
                  <segmenttimeline>
  
                      <s t="772096" d="270336"></s>
  
                      <s d="293888"></s>
  
                      <s d="681984"></s>
  
                      <s d="480256"></s>
  
                      <s d="492544"></s>
  
                  </segmenttimeline>
  
              </segmenttemplate>
  
          </representation>
  
          <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="341000" audiosamplingrate="48000">
  
              <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="6"></audiochannelconfiguration>
  
              <segmenttemplate timescale="48000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="3">
  
                  <segmenttimeline>
  
                      <s t="772096" d="270336"></s>
  
                      <s d="293888"></s>
  
                      <s d="681984"></s>
  
                      <s d="480256"></s>
  
                      <s d="492544"></s>
  
                  </segmenttimeline>
  
              </segmenttemplate>
  
          </representation>
  
          <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="341000" audiosamplingrate="48000">
  
              <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="6"></audiochannelconfiguration>
  
              <segmenttemplate timescale="48000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="3">
  
                  <segmenttimeline>
  
                      <s t="772096" d="270336"></s>
  
                      <s d="293888"></s>
  
                      <s d="681984"></s>
  
                      <s d="480256"></s>
  
                      <s d="492544"></s>
  
                  </segmenttimeline>
  
              </segmenttemplate>
  
          </representation>
  
      </adaptationset>
  
  </period>
  
  </mpd>

  The following is the ffmpeg command that i used to generate multi bitrate video

  ffmpeg -y -i sample_video.mp4 ^
  
  -c:v libx264 -x264opts "keyint=24:min-keyint=24:no-scenecut" -r 24 ^
  
  -c:a aac -b:a 128k ^
  
  -bf 1 -b_strategy 0 -sc_threshold 0 -pix_fmt yuv420p ^
  
  -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 ^
  
  -b:v:0 250k  -filter:v:0 "scale=-2:240" -profile:v:0 baseline ^
  
  -b:v:1 750k  -filter:v:1 "scale=-2:480" -profile:v:1 main ^
  
  -b:v:2 1500k -filter:v:2 "scale=-2:720" -profile:v:2 high ^
  
  sample_dash.mp4

  and to generate the mpd file

  ffmpeg -y -re -i sample_dash.mp4 ^
  
  -map 0 ^
  
  -use_timeline 1 -use_template 1 -window_size 5 -adaptation_sets 
  
  "id=0,streams=v id=1,streams=a" ^
  
  -f dash sample_video.mpd

  Also I saw in the chrome network tab that only init-stream4.m4s and init-stream5.m4s was called.

• movenc : use similar logic to DASH when writing bit rate to ISML

  28 septembre 2016, par Jan Ekström

  movenc : use similar logic to DASH when writing bit rate to ISML
  This way, in case of bit rate not being set, max_bitrate will be
  
  used instead. This enables, for example, re-using max_bitrate
  
  information from the input or doing transcoding with a rate
  
  control mode that is not bit rate based.
  Signed-off-by : Jan Ekström <jeebjp@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/movenc.c

• Add watermark-overlay with -filter_complex to multiple outputs (dash)

  13 juillet 2020, par Werner

  I'm creating a set of files for DASH (without audio) with :

  


  ffmpeg -i "input.mov"
 -y
 -keyint_min 100 -g 100
 -sc_threshold 0
 -c:v libx264
 -pix_fmt yuv420p
 -map v:0 -s:0 320x180 -b:v:0 681.125k -maxrate:0 681.125k -bufsize:0 340.5625k
 -map v:0 -s:1 640x360 -b:v:1 2724.5k -maxrate:1 2724.5k -bufsize:1 1362.25k
 -map v:0 -s:2 1280x720 -b:v:2 5449k -maxrate:2 5449k -bufsize:2 2724.5k
 -map v:0 -s:3 1920x1080 -b:v:3 10898k -maxrate:3 10898k -bufsize:3 5449k
 -init_seg_name "myname_$RepresentationID$.$ext$"
 -media_seg_name "myname_$RepresentationID$-$Number%05d$.$ext$"
 -use_template 1 -use_timeline 1
 -seg_duration 4 -adaptation_sets "id=0,streams=v"
 -f dash "myname.mpd"


  


  Now I want to add a watermark. How is it done ? I tried something like :

  


  ffmpeg -i "input.mov"
 -y
 -i "watermark.png" // Added
 -filter_complex "overlay=24:960" // Added
 -keyint_min 100 -g 100
 -sc_threshold 0
 -c:v libx264
 -pix_fmt yuv420p
 -map v:0 -s:0 320x180 -b:v:0 681.125k -maxrate:0 681.125k -bufsize:0 340.5625k
 -map v:0 -s:1 640x360 -b:v:1 2724.5k -maxrate:1 2724.5k -bufsize:1 1362.25k
 -map v:0 -s:2 1280x720 -b:v:2 5449k -maxrate:2 5449k -bufsize:2 2724.5k
 -map v:0 -s:3 1920x1080 -b:v:3 10898k -maxrate:3 10898k -bufsize:3 5449k
 -init_seg_name "myname_$RepresentationID$.$ext$"
 -media_seg_name "myname_$RepresentationID$-$Number%05d$.$ext$"
 -use_template 1 -use_timeline 1
 -seg_duration 4 -adaptation_sets "id=0,streams=v"
 -f dash "myname.mpd"


  


  But this results in only getting the 180p-Version of the video. How can I still get all versions of the video with the overlay ?

  


  Added :
I tried as well :

  


  ffmpeg -i "input.mov"
 -y
 -i "watermark.png"
 -filter_complex "[0:v][1:v]overlay=24:960[out0][out1][out2][out3]"
 -keyint_min 100 -g 100
 -sc_threshold 0
 -c:v libx264
 -pix_fmt yuv420p
 -map "[out0]" -s:0 320x180 -b:v:0 681.125k -maxrate:0 681.125k -bufsize:0 340.5625k
 -map "[out1]" -s:1 640x360 -b:v:1 2724.5k -maxrate:1 2724.5k -bufsize:1 1362.25k
 -map "[out2]" -s:2 1280x720 -b:v:2 5449k -maxrate:2 5449k -bufsize:2 2724.5k
 -map "[out3]" -s:3 1920x1080 -b:v:3 10898k -maxrate:3 10898k -bufsize:3 5449k
 -init_seg_name "myname_$RepresentationID$.$ext$"
 -media_seg_name "myname_$RepresentationID$-$Number%05d$.$ext$"
 -use_template 1 -use_timeline 1
 -seg_duration 4 -adaptation_sets "id=0,streams=v"
 -f dash "myname.mpd"


  


  which results in the error :
No output pad can be associated to link label 'out1'.