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• Can't change video subtitles codec using ffmpeg

  31 mars 2016, par jpo38

  I’ve got a mkv file with somes streams embedded :

  Stream #0:0: Video: h264 (High), yuv420p(tv, smpte170m/smpte170m/bt709), 720x300, SAR 1:1 DAR 12:5, 25 fps, 25 tbr, 48003.07 tbn, 50 tbc (default)
  
  Stream #0:1(tr): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
  
  Stream #0:2(fr): Subtitle: dvd_subtitle, 720x300

  When playing on my PC, I can see subtitles. When playing it from my old DVD/DIVX player, I cannot see the subtitles (other mkv/avi work fine).

  So I wanted to change the subtitle encoding, to see if another one could work with my DVD player.

  ffmpeg -encoders reports :

   S..... ssa                  ASS (Advanced SubStation Alpha) subtitle (codec ass)
  
   S..... ass                  ASS (Advanced SubStation Alpha) subtitle
  
   S..... dvbsub               DVB subtitles (codec dvb_subtitle)
  
   S..... dvdsub               DVD subtitles (codec dvd_subtitle)
  
   S..... mov_text             3GPP Timed Text subtitle
  
   S..... srt                  SubRip subtitle (codec subrip)
  
   S..... subrip               SubRip subtitle
  
   S..... text                 Raw text subtitle
  
   S..... webvtt               WebVTT subtitle
  
   S..... xsub                 DivX subtitles (XSUB)

  So I tried :

  ffmpeg -i input.mkv -acodec copy -vcodec copy -scodec "codec" converted.mkv

  with various versions of "codec". None of them will work (except the original dvdsub...) :

  xsub reports :

  [matroska @ 0x24558c0] Subtitle codec 94211 is not supported.
  
  av_interleaved_write_frame(): Function not implemented
  
  [matroska @ 0x24558c0] Subtitle codec 94211 is not supported.
  
  Error writing trailer of mustang_converted.mkv: Function not implementedframe=  244 fps=0.0 q=-1.0 Lsize=       1kB time=00:00:10.01 bitrate=   1.0kbits/s speed=1.23e+03x    
  
  video:321kB audio:235kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Conversion failed!

  ssa or ass reports :

  [ssa @ 0x262e000] Only SUBTITLE_ASS type supported.
  
  Subtitle encoding failed

  others reports :

  Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as bit_rate, rate, width or height

  What am I doing wrong ? Are some subtitles codec incompatible with the current video or audio codec ? Should I change those instead of copying ?

  Alternatively, is there an option to merge subtitle within the video images stream for good (and then have only two output streams : audio and video but preserve subtitles display) ?

  Note : Answer using another tool than ffmpeg are acceptable, if working under Linux (mint).

• how to add watermark and subtitles to multi video in the same time with ffmpeg

  19 novembre 2020, par Fady Sawairas

  hello i am using ffmpeg to add watermark to multi video with this code

  


  for %i in ("C :\Users\fady\Downloads\Fady\new2*.mp4") do ffmpeg -i "%i" -i C :\Users\fady\Downloads\convert\cima2u.png -preset ultrafast -filter_complex "[0]scale=1280:720 :-2[bg] ;[bg][1]overlay=main_w-overlay_w-10:10" -b:v 1000k "C :\Users\fady\Downloads\Fady\new\new2% ni.mp4"

  


  now i want to add subtitles to multi video at the same time
like video1.mp4 with subtitle video1.srt
video2.mp4 with subtitle video2.srt
video3.mp4 with subtitle video3.srt

  


  i am wondering is there any code to make it with ffmpeg one time with all video in one folder or i must make each video alone ?

  


• ffmpeg scale 4k video and add subtitles

  29 novembre 2020, par goodkid38

  I am having trouble scaling video from 4k to 1080 while still retaining the video sub titles. These subtitles are PGS based and therefore need to be baked into the output video. In order to scale the video I am using ffmpeg with a filter_complex like so :

  


  '-filter_complex', `[0:v][0:s:randomSubtitleHere]scale=1920:1080[scaled];[scaled][0:s:0]overlay[v]`, 
'-map', '[v]', '-map', 
`0:a:${movieTitle['audioSelect']}`,


  


  This will give me the video at 1080, but it i still am not seeing the subtitles I have selected.