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• avformat/hlsenc : add var_stream_map LANGUAGE field string parameter

  23 janvier 2019, par Steven Liu

  avformat/hlsenc : add var_stream_map LANGUAGE field string parameter
  use a:0,agroup:aud_low,default:Yes,language:CHN a:1,agroup:aud_low,language:ENG
  
          a:2,agroup:aud_high,default:YesYes,language:CHN a:3,agroup:aud_high,language:ENG
  
          v:0,agroup:aud_low v:1,agroup:aud_high
  
          create master m3u8 list.
  result :
  
  EXTM3U
  
  EXT-X-VERSION:3
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_0",DEFAULT=YES,LANGUAGE="CHN",URI="out_0.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,LANGUAGE="ENG",URI="out_1.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,LANGUAGE="CHN",URI="out_2.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,LANGUAGE="ENG",URI="out_3.m3u8"
  
  EXT-X-STREAM-INF:BANDWIDTH=1170400,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_low"
  
  out_4.m3u8
  
  EXT-X-STREAM-INF:BANDWIDTH=3440800,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_high"
  
  out_5.m3u8
  Signed-off-by : Steven Liu <lq@chinaffmpeg.org>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/dashenc.c
  • [DH] libavformat/hlsenc.c
  • [DH] libavformat/hlsplaylist.c
  • [DH] libavformat/hlsplaylist.h

• Single Command to crop, animate (effects) and add images and texts in one video

  7 mars 2019, par Vivek Faldu

  I want to create a command where i can perform single operation.

  I have few commands which are working well individually

  Add Background Music Command

  String[] command = {"-i", inputPath, "-i", 
  
  audioPath, "-filter_complex", "amix", "-preset", 
  
  "ultrafast", "-vcodec", "libx264", outputPath};

  Multiple Image OverLay Command

  String[] command = {"-i", inputPath, "-i", 
  
  audio.getAbsolutePath(), "-i", image1,
  
  "-i", image2, "-i", image3, "- 
  
  filter_complex","[0][1]overlay=x=W/2-w/2:y=H/2- 
  
  h/2:enable='between(t,2,10)'[v1];[v1][2]overlay=x=W/2-w/2:y=H/2- 
  
  h/2:enable='between(t,10,20)'[v2];[v2][3]overlay=x=W/2-w/2:y=H/2- 
  
  h/2:enable='gt(t,20)'[v3]","-map", "[v3]", outputPath};

  Image OverLay Command

  String[] command = {"-i", inputPath, "-i", 
  
  image,"-filter_complex","overlay=(main_w-overlay_w)/2: 
  
  (main_h-overlay_h)/2","-codec:a", "copy", outputPath};

  Cropping Command

  String[] command = {"-i", inputPath, "-filter:v", "crop=iw/2:ih:" 
  
  + 0 + ":" + 0, "-c:a", "copy", outputPath};

  Effect

  String[] command = {"-i", inputPath, "-loop", "1", "-t", "2", "- 
  
  i", image1, "-loop", "1", "-t", "2", "-i", 
  
  image2, "-filter_complex", " 
  
  [0]boxblur=enable='lt(t,2)+gt(t,10)'[vid]; 
  
  [1:v]format=rgba,fade=in:st=0:d=0.5:alpha=1,
  
  fade=out:st=1.5:d=0.5:alpha=1[img1]; 
  
  [2:v]format=rgba,fade=in:st=0:d=0.5:alpha=1,
  
  fade=out:st=1.5:d=0.5:alpha=1,setpts 
  
  =PTS+10/TB[img2];[vid][img1]overlay=(main_w-overlay_w)/2:(main_h- 
  
  overlay_h)/2[bkg];[bkg][img2]overlay=(main_w-overlay_w)/2:(main_h- 
  
  overlay_h)/2", "-preset", "ultrafast", "-c:a", "copy", outputPath};

  But I don’t have any clue how to combine this all to one single command. Please help me out.

  Thanks in advance.

• ffmpeg select highest quality video track and audio track in specific language from m3u8

  17 juin 2019, par smfs

  I have a bunch of .m3u8 files that contain video tracks in different resolutions and bitrates, and audio tracks in different laguages.
  I want to select the highest quality video stream and if available the audio track in a specified language.

  I know how to select the audio track, currently I use

  -map 0:m:language:en? 

  like this

  ffmpeg -re -protocol_whitelist file,http,https,tcp,tls -i .\some_file.m3u8 -codec:a aac -c:v copy -f flv -map 0:m:language:en? rtmp://foo.com:1935/live/xyz

  With that I only stream audio if the specified audio language is available, or audio and video in the default configuration if it’s not.

  I want to stream the best video track (the one ffmpeg picks by default) in both cases.