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• Downloading earlier segments from a live m3u8 playlist

  25 juillet 2016, par Zafer Cesur

  I have an .m3u8 URI from an online live-stream. As far as I know, live playlists use a sliding window instead of containing all the segments. My questions are,

  ---

  1) Is it possible to find out what the length of the window is (time or frame-wise) ? My intention is to use the playlist I have to download a live-stream starting from an earlier time.

  2) If yes, how do I get the earlier segments, i.e., how do I specify where I want to start downloading from ? I tried something like ffmpeg -ss -00:00:10 -i "in.m3u8" out.mp4, but it did not work.

  I do not have much experience in video-encoding or live-streaming, and I would appreciate any direction ! The file that I am dealing with is printed below.

  ---

  #EXTM3U
  
  #EXT-X-TWITCH-INFO:NODE="video-edge-913b2c.jfk03",MANIFEST-NODE="video-edge-913b2c.jfk03",SERVER-TIME="1469462316.46",USER-IP="...",SERVING-ID="...",CLUSTER="jfk03",ABS="false",BROADCAST-ID="22500458080",STREAM-TIME="17374.4599299",MANIFEST-CLUSTER="jfk03"
  
  #EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="chunked",NAME="Source",AUTOSELECT=YES,DEFAULT=YES
  
  #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=3566000,RESOLUTION=1920x1080,CODECS="avc1.4D402A,mp4a.40.2",VIDEO="chunked"
  
  http://video-edge-913b2c.jfk03.hls.ttvnw.net/hls-7e8a7c/imaqtpie_22500458080_490173831/chunked/index-live.m3u8?token=id=...,bid=...,exp=1469548716,node=video-edge-913b2c.jfk03,nname=video-edge-913b2c.jfk03,fmt=chunked&sig=...
  
  #EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="high",NAME="High",AUTOSELECT=YES,DEFAULT=YES
  
  #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1760000,RESOLUTION=1280x720,CODECS="avc1.66.31,mp4a.40.2",VIDEO="high"
  
  http://video-edge-913b2c.jfk03.hls.ttvnw.net/hls-7e8a7c/imaqtpie_22500458080_490173831/high/index-live.m3u8?token=id=...,bid=...,exp=1469548716,node=video-edge-913b2c.jfk03,nname=video-edge-913b2c.jfk03,fmt=high&sig=...
  
  ...

• Capture video on iOS device and live stream it to a server (or another mobile)

  13 février 2015, par theDuncs

  I want to be able to record footage using my iOS device and stream it directly to a server.

  There’s quite a few articles on S.O. that talk about this, but I’m not sure any have answered the question very well.

  Should I be using HTTP Live Streaming, or is this just for sending data to an iPhone ?
  Should I be using AVCaptureSession to grab the video (a segment at a time ?), sending each segment to the server ?
  Should I be using AVCaptureVideoDataOutput and ffmpeg for streaming ?

  I’m a little lost with all this, so any sample code or docs or links would be really appreciated.

  Thanks for your help guys.

  Duncan

• Is there a way to clip the last 30 seconds of a live m3u8 using FFMPEG [duplicate]

  4 décembre 2019, par kittencornball

  This question already has an answer here :

  • FFMpeg Copy Live Stream (Limit to 60s file)
    
    2 answers
    
  • Stream MJPEG to file, but keep only last x minutes
    
    1 answer
    

  I’m trying to use ffmpeg to clip high-lights from a live m3u8

  This is what I’m using now -

  ffmpeg -i livestream.m3u8 -t 30 -c copy output.mp4

  It seems to be cutting 30 seconds from when I run it.
  Is there a way to cut 30 seconds before I run it.