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• how do I only output a single video stream per HLS output

  20 octobre 2018, par Marc Archenault

  I have successfully output 3 HLS output using -map 360, 720 & 1080p. My source file is 540p. once generated I use ffprobe on the newly created 360.ts, 720.ts, and 1080.ts and notice that there is a second video channel. This channel is the input video. How do I have FFmpeg not output the original video as part of the output ?

  this is the ffprobe on 360.ts

  Stream #0:0[0x100] : Video : h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  Stream #0:10x101 : Audio : aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 100 kb/s
  Stream #0:2[0x102] : Video : h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 960x540 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc

  This is the FFmpeg command

  %ffmpeg% -loglevel fatal -threads %threads% -hide_banner -y -i %input% -i %overlayImg%^
  -filter_complex "[1]colorchannelmixer=aa=%thumbopacity%,scale=iw*%thumbscale% :-1[wm] ;[0:v][wm]overlay=(main_w-overlay_w)-36 :(main_h-overlay_h)-21,split=4[a][b][c][d] ;[a]scale=w=640:h=360:force_original_aspect_ratio=decrease[a] ;[b]scale=w=1280:h=720:force_original_aspect_ratio=decrease[b] ;[c]scale=w=1920:h=1080:force_original_aspect_ratio=decrease[c] ;[d]scale=w=1280:h=720:force_original_aspect_ratio=decrease[d]"^
  -map "[a]" -map 0 -c:a aac -ar 48000 -c:v h264 -profile:v main -movflags +faststart -tune film -crf %crf% -preset %preset% -sc_threshold 0 -g 72 -keyint_min 72 -hls_time 4 -hls_playlist_type vod -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_flags single_file^
  %output%\360p.m3u8^
  -map "[b]" -map 0 -c:a aac -ar 48000 -c:v h264 -profile:v main -movflags +faststart -tune film -crf %crf% -preset %preset% -sc_threshold 0 -g 72 -keyint_min 72 -hls_time 4 -hls_playlist_type vod -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_flags single_file^
  %output%\720p.m3u8^
  -map "[c]" -map 0 -c:a aac -ar 48000 -c:v h264 -profile:v main -movflags +faststart -tune film -crf %crf% -preset %preset% -sc_threshold 0 -g 72 -keyint_min 72 -hls_time 4 -hls_playlist_type vod -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_flags single_file^
  %output%\1080p.m3u8^
  -map "[d]" -map 0 -c:a aac -ar 48000 -c:v h264 -profile:v main -preset %preset%^
  %output%\720.mp4^
  -map 0:v -y -ss 0.5 -vframes 1 -s %thumbsize% -ss 30^
  %outputthumb%

  thank you.

• The Ultimate YouTube-DL script [on hold]

  30 juillet 2018, par G. L.

  I need help creating/finishing a bash script. What I’m trying to do is to create the perfect YouTube-DL archiving script.
  As of now, the only thing I can do is download all of a Users’ videos, embed subtitles, add metadata but I want to also autosub the files (with script number 2) and convert the downloaded files with ffmpeg or AVConv or handbrake-cli and then remove the video files when I have a successful conversion.

  Script 1 (downloads videos skipping already downloaded ones)

  youtube-dl -i -o "%(title)s-%(id)s.%(ext)s" --all-subs --embed-subs --embed-thumbnail --add-metadata --sleep-interval=20 --rate-limit=1M --exec 'youtube-dl2kodi.py -t tvshow -f {}' --download-archive .archive $(cat url.txt) 

  Note : youtube-dl2kodi.py creates Kodi compatible nfo files so I can view them properly on Kodi with metadata.

  Script 2 (subtitles videos automatically using autosub)

  for file in *I WANT TO AUTOSUB files in this directory and subdirectories*
  
  do
  
    autosub -S de -D de "$file" >> results.out
  
  done

  I want to merge script 1 and 2 and then encode the files and remove original video files (mp4, mkv and webm) if successful.
  My encoding preference is HEVC with CRF 23 and I don’t want to encode the audio. I want to copy the audio. The final video would be a MKV file.

• cutting multiple segments with ffmpeg [duplicate]

  13 juin 2018, par B Pulsart

  This question already has an answer here :

  • Every 30 seconds is to cut a video 3s
    
    1 answer
    

  So there is a 10 min long .mp4 and I have to cut it in 2 seconds long segments every 10 seconds, then concatenate all 2 sec segments together to get a 2 min long film.

  I manage to do that with a loop in python that subprocep ffmpeg, but it’s long and ugly (cut, cut cut... and then glue)

  Is it a way to do that with just a line in ffmpeg ?

  my code in python for cutting sequences :

  import subprocess# as sp
  
  
  
  ffmpeg = file on disk # on Windows
  
  film_in =  a file name
  
  
  
  t_total = 10#min
  
  t_sec = t_total*60
  
  
  
  def c_cut(time) :
  
      cmd = [ffmpeg  , '-i' ,film_in ,'-b:v', '800k' ,'-ss', str(time) , '-t','2' , '-an', film_out]
  
      return cmd
  
  
  
  
  
  for tps in range(0, t_sec, 10) :
  
      film_out = a file name unique for each segment
  
      command = c_cut(tps)
  
      subprocess.call(command)