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• Word-by-word display of subtitles in FFMPEG ?

  10 mars 2020, par ThaDon

  I am trying to burn subtitles into a video such that they appear in a word-by-word fashion instead of all at once.

  What I mean by this is, a word will appear, then another word will appear next to it, and so on. Eventually the line will clear, then repeat.

  Example :

  

  I thought I could create an Advanced Substation Alpha file where subtitles share the same end-time but differing start times, however FFMPEG doesn’t seem to cope very well when rendering the file :

  [Script Info]
  
  ; Script generated by FFmpeg/Lavc57.107.100
  
  ScriptType: v4.00+
  
  PlayResX: 384
  
  PlayResY: 288
  
  
  
  [V4+ Styles]
  
  Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
  
  Style: Default,Arial,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,1,1,0,2,10,10,10,0
  
  
  
  [Events]
  
  Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
  
  Dialogue: 0,0:00:00.00,0:00:03.46,Default,,0,0,0,,I'm
  
  Dialogue: 0,0:00:01.00,0:00:03.46,Default,,0,0,0,,a
  
  Dialogue: 0,0:00:01.50,0:00:03.46,Default,,0,0,0,,subtitle

  The idea being that I'm would appear, then 1 second later a would show up next to it followed by subtitle a half second later

• nut : Use nut->version in the version range check

  7 juillet 2014, par Luca Barbato

  nut : Use nut->version in the version range check
  It was wrongly left unchanged when the version field had been
  
  introduced. (c94e2e85cb6af8a570d8542a830556243bd32873)
  

  • [DH] libavformat/nutdec.c

• Linux - ffmpeg 3.4.6 vs. 4.2.1 - bash script with Tee (record & stream) runs in older version just fine - what needs to change for new version ?

  22 juillet 2020, par pomptondrive

  Thanks for reading my post. I have a bash script that I tested and it ran just fine ; although I was putting the script into identical hardware as the test computer, I forgot that the target computer would have a newer version of ffmpeg. It should be simple. I'm splitting the signal, recording, and streaming via UDP. Here's the script, that runs just fine with ffmpeg 3.4.6 :

  


  ffmpeg -f v4l2 -i /dev/video0 -t 00:30:00 -vf "drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf:text='%{localtime\:%T}':x=20:y=20:fontcolor=white" \
-profile:v high -pix_fmt yuvj420p -level:v 4.1 -preset ultrafast -tune \
zerolatency -vcodec libx264 -r 15 -b:v 512k -s 960x720 -f mpegts -flush_packets 0 \
-f tee -map 0:v "/media/dkm/video_usb/videos/video_$(date +%Y-%m-%d_%H.%M.%S).mkv|[f=mpegts]udp://192.168.0.19:5000?pkt_size=1316"


  


  I could try to downgrade, but that doesn't seem right, since that computer is running Linux Mint 19.2 and the original test computer was Ubuntu 18.4 LTS. Is there something basic that I need to change for v. 4.2.1 ?

  


  I'm hoping that this is a quick fix, since it runs in the old version, but I've learned not to get my hopes up for such things. Any help would be appreciated. I've perused the documentation, but I wasn't able to see anything salient. Thanks in advance !