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• movenc : Remove an outdated comment

  3 novembre 2014, par Martin Storsjö

  movenc : Remove an outdated comment
  QuickTime does support files with an empty initial movie
  
  these days.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DBH] doc/muxers.texi
  • [DBH] libavformat/movenc.c

• Mac Terminal (Bash) batch program to get multimedia file info using ffmpeg

  7 décembre 2013, par julesverne

  I have a Mac computer. Usually all my batch programming is done on my PC. So I tried to create what I assumed would be a simple equivalent using a Mac shell. Obviously as you all know that was foolish of me to think that. After 2 days of scowering the web I found the closest thing I could to what I was looking for. But no, this doesn't work either.

  All I'd like to do is throw a multimedia file onto the script, and have the terminal give me the ffmpeg info output. In my searching I did find this "$@" which as far as I can tell is the windows bat equivalent of %*. Meaning you can throw files on the script and the script refers to those files as variables which can be processed. So I believe what I want to do is possible.

  Again the code at the bottom is just to look through the current directory of all .mov files and run ffmpeg. It doesn't work. But.. if no one can help me figure out the actual thing I'd like to do then I'd settle with something like below that does actually work.

  #!/bin/bash
  
  FFMPEG=/Applications/ffmpeg
  
  FIND=/usr/bin/find
  
  FILES=$(${FIND} . -type f  -iname "*.mov")
  
  if [ "$FILES" == "" ]
  
  then
  
  echo "There are no *.mov file in $(pwd) directory"
  
  exit 1
  
  fi
  
  
  
  for f in *.mov
  
  do
  
  
  
  $FFMPEG -i "$f"
  
  
  
  done

  If someone can please help me figure this out I'd really appreciate it. Thank you in advance ! Jules

  I just found this solution from the "similar questions" sidebar, which is similar to the script above, so again, not completely what I wanted but.. didn't matter, didn't work for me. How to batch convert mp4 files to ogg with ffmpeg using a bash command or Ruby

• Generate individual HLS-compatible .ts segments on-demand by downloading as little bytes as possible from a remote input file

  28 juillet 2017, par Romain Cointepas

  I’m trying to generate individual HLS-compatible .ts segments on-demand by downloading/reading as little bytes as possible from a remote input file (hosted on a server supporting byte-ranges requests).

  One of the application for this would be to be able to transcode and play on Apple TV (via Airplay) a remote file that is not Airplay compatible, without having to download the entire file first.

  I am generating the playlist myself, and I have access to the ffprobe results for the remote file (that gives video duration, etc.).

  I have something working that plays via Airplay but with small video and audio glitches between each segments when I use the following command to generate each segment :

  ffmpeg -ss 60 -t 6 -i http://s3.amazonaws.com/misc-12345/avicii.vob -f mpegts -map 0:v:0 -map 0:a:0 -c:v libx264 -bsf:v h264_mp4toannexb -force_key_frames "expr:gte(t,n_forced*6)" -forced-idr 1 -pix_fmt yuv420p -colorspace bt709 -c:a aac -async 1 -preset ultrafast pipe:1

  Note : above command is for segment 11.ts, and in the m3u8 playlist I advertise each segment duration as 6 seconds.

  Here is a Youtube video showing the audio/video glitches between segments :
  https://www.youtube.com/watch?v=0vMwgbSfsu0

  The segment or hls modules of ffmpeg can’t be used because they both generate all the segments at once.

  I’ve been struggling on this for some days now and I would really appreciate some help !