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• .mpd deleted after played

  18 novembre 2020, par thxbox

  I would like to stream mp4 file with .mpd file. I installed MP4Box to convert mp4 to .mpd file, with this command

  


  P4Box -dash 4000 -frag 4000 -dash-profile onDemand -segment-name out-seg -time-shift -1 -out prev_video.mpd prev_video.mp4


  


  on my Ubuntu server

  


  I also use nginx-rtmp-module to do video streaming.

  


  My problem is after I play .mpd file with VLC Player then .mpd file was auto deleted.
so question is, is it possible to keep .mpd in my server ? or I miss some configuration while convert .mp4 to .mpd with MP4Box

  


  Thank

  


• webmdashenc : Fix UTCTiming Element

  28 avril 2015, par Vignesh Venkatasubramanian

  webmdashenc : Fix UTCTiming Element
  Remove the direct profile from UTCTiming element. Per DASH spec,
  
  direct profile value should be the time at which the request was
  
  made to the server and not the time at which the manifest was
  
  written. So ffmpeg cannot write this value. This patch removes
  
  the direct profile and write the UTCTiming element with the http
  
  profile only if a URL is passed as a parameter. Update the fate
  
  test 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-live

• ffmpeg fast seek large MP4 over HTTP

  28 juillet 2024, par Gmanicus

  I'm attempting to download snapshots from a video provided by the U.S House of Representatives :

  


  https://houseliveprod-f9h4cpb9dyb8gegg.a01.azurefd.net/east/2024-04-11T08-55-12_Download/video_3000000_1.mp4


  


  I am using fluent-ffmpeg in Node to execute this command :

  


  ffmpeg('https://houseliveprod-f9h4cpb9dyb8gegg.a01.azurefd.net/east/2024-04-11T08-55-12_Download/video_3000000_1.mp4')
  .inputOption(`-ss 03:33:33`)
  .outputOptions([
     '-vframes 1'
  ])
  .output('test.png')

// Effectively:
// ffmpeg -ss 03:33:33 -i  -y -vframes 1 test.png


  


  My intention is to fast-seek to the desired timestamp and take a snapshot over HTTP. However, when doing so, the performance is not great. A snapshot takes about 10s per 3hrs of video and seems to increase fairly linearly at that rate.

  


  However, when using ffmpeg on the same video locally, it's super fast ! Sub-500ms regardless of the desired timestamp.

  


  Is there some magic that could be done via ffmpeg options or perhaps some sort of technique with manual requests to get a snapshot at the desired segment of video more efficiently ?