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• Encrypted HLS works as live stream, doesn't work as VOD

  22 avril 2015, par Misiur

  I’ve found some crude bash script for encoding and encrypting video file, into a HLS stream, and I’ve edited it slightly (I have no idea about bash) :

  #!/bin/bash
  
  
  
  set -e     # Exit on errors
  
  
  
  tsFile="$1"
  
  
  
  if ! [ -f "$tsFile" -a -r "$tsFile" ]; then
  
      echo "First argument is required" >&2
  
      exit 2
  
  fi
  
  
  
  if [ -z "$3" ]; then
  
      output="output"
  
  else
  
      output="$3"
  
  fi
  
  
  
  
  
  keyFile="$output.key"
  
  keyInfoFile="$output.keyinfo"
  
  playList="$output.m3u8"
  
  
  
  if [ -z "$4" ]; then
  
      separator='-'
  
  else 
  
      separator="$4"
  
  fi
  
  
  
  splitFilePrefix="$output$separator"
  
  
  
  
  
  if [ -d "$2" ]; then
  
      outDir="$2"
  
  else
  
      mkdir "$2" || exit 1
  
      outDir="$2"
  
  fi
  
  
  
  tempDir="$outDir/.$$_tmp"
  
  keyFile="$outDir/$keyFile"
  
  
  
  mkdir $tempDir
  
  
  
  echo "$outdir/$keyFile\n$outdir/$keyFile" > "$outdir/$keyInfoFile"
  
  
  
  
  
  ffmpeg -i "$tsFile" -hls_time 5 -hls_list_size 0 -hls_segment_filename "$tempDir/$splitFilePrefix%03d.ts" -strict -2 "$tempDir/$playList"
  
  
  
  openssl rand 16 > $keyFile
  
  encryptionKey=`cat $keyFile | hexdump -e '16/1 "%02x"'`
  
  
  
  numberOfTsFiles=$(( `ls "$tempDir/$splitFilePrefix"*.ts | wc -l` -1 ))
  
  
  
  for i in $(seq -f "%03g" 0 $numberOfTsFiles); do
  
      initializationVector=`printf '%032x' $(( 10#$i))`
  
      openssl aes-128-cbc -e -in "$tempDir/$splitFilePrefix"$i.ts \
  
      -out "$outDir/$splitFilePrefix"$i.ts -nosalt -iv $initializationVector -K $encryptionKey
  
  done
  
  
  
  {
  
      head -4 "$tempDir/$playList"
  
      echo '#EXT-X-KEY:METHOD=AES-128,URI='"$keyFile"
  
      egrep "$tempDir/$playList" -vie '#EXT-X-TARGETDURATION:' \
  
      | tail -n +4
  
  } > "$outDir/$playList"
  
  
  
  #rm -r "$tempDir"

  This results in a something like this :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-KEY:METHOD=AES-128,URI=output.key
  
  #EXT-X-TARGETDURATION:11
  
  #EXTINF:10.176833,
  
  output-000.ts
  
  #EXTINF:8.341667,
  
  output-001.ts
  
  #EXTINF:8.341667,
  
  output-002.ts
  
  #EXTINF:3.136467,
  
  output-003.ts
  
  #EXT-X-ENDLIST

  This almost works. However I need an VOD, not a live stream. So, I added line :

  #EXT-X-PLAYLIST-TYPE:VOD

  And now it doesn’t work with encrypted segments, only with unencrypted ones. I thought all segments are crypted separately ? Also, even with unencrypted files, the info about total length isn’t present. How can I fix that ?

• Live Streaming and watching HLS stream on VLC

  9 avril 2015, par TakeruDavis

  I have been trying to livestream a video in HLS using ffmpeg (trying both hls and segment mode) and everything looks like it should, m3u8 file is created and the content matches with examples.

  TS files look good as well, briefly looking at their headers in HEX editor makes them seem okay and separately, they are playable.

  But when I enter the URL of the m3u8 playlist into VLC, at first, it does nothing, then it seems like it is trying to open files with weird filenames. My best guess is it opens those TS files and treats their content as another playlist.

  Can someone help me figure out what might be the problem ?

  PS : I think I set up Apache properly too, it should be giving correct MIME types for both things.

• How can i decode an mp3 and encode it as aac with ezstream

  8 avril 2015, par Roberto Arosemena

  This is my current ezstream config

  <ezstream>
  
     <url>http://localhost:8000/test</url>
  
     <sourcepassword>password</sourcepassword>
  
     <format>MP3</format>
  
     <filename>playlist.m3u</filename>
  
     <reencode>
  
        <enable>1</enable>
  
        <encdec>
  
           <format>MP3</format>
  
           <match>.mp3</match>
  
           <decode>madplay -b 16 -R 44100 -S -o raw:- "@T@"</decode>
  
           <encode>lame --preset cbr 32 -r -s 44.1 --bitwidth 16 - -</encode>
  
        </encdec>
  
     </reencode>
  
  </ezstream>

  It’s mounting to an icecast server, its decoding and encoding mp3 to a lower bitrate, I’m trying to encode it to aac instead of mp3 in hopes that the quality improves as i heard that aac is better than mp3 for lower bitrates.

  What i would like to know is if i can use an aac encoder such as FFmpeg instead of the lame mp3 encoder and get an aac to the end user instead of mp3, if so what parameters should i pass to FFmpeg so that it works with my current config.