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• How to extract duration time of online videos listed in a text file

  22 août 2022, par Ginofalaci

  I need to check the duration of thousand of videos online. I m trying to get this from a text file containing the urls of the videos.

  


  I have those two commands that are working great with one url, but i don't find out how to get it work with a list within a file text.

  


  fmpeg -i My.url 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,//


  


  or this :

  


  ffmpeg -i my.url 2>&1 | grep Duration | sed 's/Duration: \(.*\), start/\1/g'


  


  im trying :

  


  fmpeg -i listurls.txt 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,//


  


  or this :

  


  ffmpeg -i listurls.txt 2>&1 | grep Duration | sed 's/Duration: \(.*\), start/\1/g'


  


  my file text is like this :

  


  myurl1.m3u8
  
myurl2.m3u8
  
myurl3.m3u8
  
myurl4.m3u8
  
myurl5.m3u8

  


  I've also tried :

  


  file 'myurl1.m3u8'
  
file 'myurl2.m3u8'
  
file 'myurl3.m3u8'
  
file 'myurl4.m3u8'
  
file 'myurl5.m3u8'

  


  but it doesn't work.

  


  Also some videos might not be online anymore, but still referenced, so it would give no result, but I would like if possible to have the result "0" than nothing, it will be much easier to use the results afterwards.

  


  (awk, sed, mediainfo, exiftool, any will be good, ) Thanks in advance.

  


• What is a good/simple way to obtain a stream of song metadata from an online radio station ?

  29 juin 2022, par esp

  What is a good/simple way to obtain a stream of song metadata (artist names and song titles etc.) from an online radio station ? Just the metadata, not the data (media). On bash command-line for now, thinking of getting it to a database (eg MySQL) in future.

  


  I have had success using FFMpeg to do this (simply FFMpeg -i <streamurl></streamurl>). However it only reports the song playing once - when it is run. If I specify an outputfile (e.g. -f null -) then it continues to run but does not report any updates to the "now playing" metadata. If I do not specify an output file then, after reporting that metadata, it quits (which in my case is more useful !).

  


  I can imagine one way round this would be to make a polling-loop, say every 10 seconds, only reporting when the metadata has changed (since the previous time). Does anyone have a battle-tested example ?

  


  But is there a better (or cooler way) to achieve this ?

  


• avcodec/h264_picture : don't assume Film Grain Params side data will be present

  17 octobre 2021, par James Almer

  avcodec/h264_picture : don't assume Film Grain Params side data will be present
  If a decoding error happens before frame side data is allocated, this assert may be
  
  triggered. And since applying film grain is not enforced (we just warn it wasn't
  
  applied and move on), we can just do that in such scenarios.
  Fixes : Assertion failure
  
  Fixes : clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5528650032742400
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/h264_picture.c