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• lavf/webmdashenc : Representation IDs should be unique.

  11 novembre 2014, par Vignesh Venkatasubramanian

  lavf/webmdashenc : Representation IDs should be unique.
  According to the DASH spec, Representation IDs should be unique
  
  across all adaptation sets. Fixing that and updating the fate
  
  reference file to reflect this change.
  Signed-off-by : Vignesh Venkatasubramanian <vigneshv@google.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/webmdashenc.c
  • [DH] tests/ref/fate/webm-dash-manifest

• failed to read iv from the auxiliary info

  9 décembre 2017, par diS

  Passing encryption key and kid to mp4 muxer to encrypt the dash segments. With ffmpeg command generating dash single file for playback. But when I play using ffplay I see failed to read the IV from auxiliary info

  ffmpeg -y -f mp4 -i SampleVideo_1280x720_20mb.mp4 -map 0:v:0 -c copy -f dash -encryption_scheme cenc-aes-ctr -encryption_key <key> -encryption_kid <kid> -min_seg_duration 4000000 -use_timeline 1 -use_template 1 -single_file 1 ./enc.mpd
  
  
  
  ffplay enc-stream0.m4s -decryption_key <key>
  
  </key></kid></key>

  I get the error

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fa3040008c0] failed to read iv from the
  auxiliary info

  On side note : don not see playback error when single file generated using mp4 muxer alone. Any inputs ? thanks...

• Parse dynamic mpd file with Media Source Extensions

  17 février 2023, par FrankC

  I just started learning about adaptive streaming, and currently I'm working on a project that needs showing a live video. In order to control some of the elements in mpd file, I determined to use MSE instead of dash.js. I refer to the code at the following URL :https://learn.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/samples/dn551368(v=vs.85)
But I found out that there is no "Initialization" tag or "range" attribute in my mpd file. I don't find any relative attribute as well. By the way I'm use nginx-rtmp + ffmpeg to generate dash file.
So here is my dash file looks like

  


  &lt;?xml version="1.0"?>&#xA; &#xA;  <period start="PT0S">&#xA;    &#xA;      &#xA;        &#xA;          <segmenttimeline>&#xA;             <s t="0" d="10000"></s>&#xA;             <s t="10000" d="10000"></s>&#xA;             <s t="20000" d="5000"></s>&#xA;             <s t="25000" d="10000"></s>&#xA;          </segmenttimeline>&#xA;        &#xA;      &#xA;    &#xA;  </period>&#xA;&#xA;

  


  My question is :
1.Did I have any missing parameters in using ffmpeg or nginx-rtmp resulting in losting tag in mpd file ?
2.Or there is other way to setup "Initialization"/"range" attribute and let my program work ?
3.I also curious about why my mpd file doesn't have a baseURL element ?

  


  ※My mpd file works fine with dash.js, I can see the video properly

  


  THANKS A LOT