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• Is it possible to add stroke to text in ffmpeg

  5 mai 2021, par DLucky Studio

  I would like to add black stroke to text in ffmpeg. Is it possible ?

  


  ffmpeg -y -i video.mp4 -vf drawtext="fontfile=arialuni.ttf:textfile=z1.txt : x=0/2:y=h-t*13:fontcolor=white:fontsize=35:shadowcolor=black:shadowx=10:shadowy=10" -shortest -vcodec libx264 -pix_fmt yuv420p -r 25 -g 160 -b:v 4000k -profile:v main -level 3.1 -acodec libmp3lame -b:a 128k -ar 44100 -preset superfast output1.mp4


  


• Stacking videos with ffmpeg via MATLAB not working as expected

  18 juillet 2022, par ersatzsheep

  I am stacking 4 video inputs in a 2x2 grid and running into a conversion failure.

  


  Basically, at least one of the videos is just a filler black video that I generated with this line (MATLAB, hence the eval) :

  


  eval(['!ffmpeg -framerate 1/3600 -i black_frame.JPG -c:v libx264 -t 3600 -pix_fmt yuv420p -vf scale=320:240 black_frame.mp4']);


  


  The other video inputs are 4 hr long videos with identical specs. I've concatenated them with this line :

  


  eval(['!ffmpeg -i "' v1 '" -i "' v3 '" -i "' v2 '" -i "' v4 '" -filter_complex "  [0:v] setpts=PTS-STARTPTS, scale=qvga [a0]; [1:v] setpts=PTS-STARTPTS, scale=qvga [a1]; [2:v] setpts=PTS-STARTPTS, scale=qvga [a2];  [3:v] setpts=PTS-STARTPTS, scale=qvga [a3];  [a0][a1][a2][a3]xstack=inputs=4:layout=0_0|0_h0|w0_0|w0_h0[out] "  -map "[out]" -c:v libx264 "' output '"'])  


  


  When I input v1-v4 with normal videos (not the filler black video), it outputs very quickly and everything is good. The line to generate the filler black video is very fast too. But when I sub one of the video inputs with the file path for the filler black video, the speed tanks exponentially, stalls, and conversion fails.

  


  Any pointers for me ? I also tried just subbing one of the inputs with a black image file instead of generating a whole video and inputting that. But it does the same thing :/ Does it have to do with frame rate ? Should I try a different approach ? Thanks.

  


• Youtube-dl cannot read various set on batch script

  18 novembre 2019, par Al UrbaseR Blongtous

  I created an batch-script that positioned with youtube-dl and ffmpeg. I set several set to put URL and Video/Audio ID. Here my script that I simplified

  @echo off
  
  cd /d %root%\YT
  
  color 0a
  
  title Youtube Downloader
  
  setlocal enableDelayedExpansion
  
  set q=^"
  
  color 0a
  
  
  
  :submenu
  
  echo Please enter URL.
  
  set /p f1="URL: " 
  
  echo Checking ID...
  
  youtube-dl -F %f1%
  
  ping localhost -n 2 >nul
  
  goto menu
  
  
  
  :menu
  
  echo.
  
  echo Script created by UrbaseR
  
  echo ___________________________________________________________
  
  echo.
  
  echo                          MENU
  
  echo ___________________________________________________________
  
  echo OS Windows - %ComputerName%
  
  echo.
  
  echo M E N U
  
  echo Press 1 to Download Best version 
  
  echo Press 2 to Download Custom version + convert
  
  echo Press 3 to Exit
  
  
  
  set /p you=">"
  
  if %you%==1 goto 1
  
  if %you%==2 goto 2
  
  if %you%==3 goto 3
  
  
  
  cls
  
  echo *********************************
  
  echo Sorry invalid number!
  
  echo *********************************
  
  ping localhost -n 2 >nul
  
  goto menu
  
  
  
  :1
  
  echo Downloading...
  
  youtube-dl -f best %f1%
  
  echo.
  
  echo Done
  
  ping localhost -n 2 >nul
  
  cls
  
  goto submenu
  
  
  
  :2
  
  set /p id1="Insert Video ID: "
  
  set /p id2="Insert Audio ID: "
  
  echo Downloading Video..
  
  youtube-dl -f %id1% -ciw -o "vid.%(ext)s" -v --write-sub %f1%
  
  echo.
  
  echo Video Done
  
  ping localhost -n 2 >nul
  
  echo Downloading Audio..
  
  youtube-dl -f %id2% -ciw -o "aud.%(ext)s" -v %f1%
  
  echo.
  
  echo Audio Done
  
  ping localhost -n 2 >nul
  
  echo Converting Video
  
  ffmpeg -i "vid.%(ext)s" -i "aud.%(ext)s" -c:v copy -c:a aac -strict experimental "input.mkv"
  
  echo Converting Done
  
  ping localhost -n 4 >nul
  
  cls
  
  goto submenu
  
  
  
  :3
  
  exit

  First and third option execute successfully. Second option will appear the message like this :

  Usage : youtube-dl [OPTIONS] URL [URL...]
  youtube-dl : error : You must provide at least one URL.

  Type youtube-dl —help to see a list of all options.

  Note : Since I stuck on first and second stage of youtube-dl, ffmpeg may not work (I have not tested it yet).

  Can you help me ?