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• Need to run ffmpeg multiple commands one after another

  16 mars 2017, par user1777097

  I need to run 100+ line commands on ffmpeg FF Prompt (on my windows PC)
  Example code

  ffmpeg -i "Agriculture, Farms 01.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-1.mp4 -y
  ffmpeg -i "Agriculture, Farms 02.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-2.mp4 -y
  ffmpeg -i "Agriculture, Farms 03.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-3.mp4 -y
  ffmpeg -i "Agriculture, Farms 04.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-4.mp4 -y
  ffmpeg -i "Agriculture, Farms 05.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-5.mp4 -y
  ffmpeg -i "Agriculture, Farms 06.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-6.mp4 -y
  ffmpeg -i "Agriculture, Farms 07.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-7.mp4 -y
  ffmpeg -i "Agriculture, Farms 08.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-8.mp4 -y
  ffmpeg -i "Agriculture, Farms 09.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-9.mp4 -y
  ffmpeg -i "Agriculture, Farms 10.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-10.mp4 -y
  ffmpeg -i "Agriculture, Farms 11.mp4" -vf scale=1280:720 -b:v 2000000 agriculture-farms-11.mp4 -y
  .........................
  .............
  ............

  now every time i need to paste one line, after that have to wait until complete... then paste next line and so on.

  is there any way so i can paste all line togather or any other option or any software ?

• Set the filename downloaded via youtube-dl to a variable [closed]

  22 septembre 2020, par Jim Jamil

  This is the current script, it's a Windows batch file that prompts for a Youtube url and then downloads the best audio in m4a. It's basically cobbled together and uses aria2 to manage the download.

  


  @echo off
SETLOCAL ENABLEDELAYEDEXPANSION
(set /p var1="Url? " && youtube-dl -f bestaudio[ext=m4a] --external-downloader aria2c --external-downloader-args "-j 16 -s 16 -x 16 -k 5M" --restrict-filenames -o "%%(title)s.%%(ext)s" --add-metadata --embed-thumbnail !Var1!)
ENDLOCAL
pause


  


  After asking for the url, I want to also prompt the user to input the start and end times to trim the audio, which would be done by ffmpeg post download.

  


  Something like :

  


  ffmpeg -i file.m4a -ss 00:00:20 -to 00:00:40 -c copy file-2.m4a


  


  Based on this : https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times/302469#302469

  


  The beginning and end times would need to be variables set by user input in 00:00:00 format, but not sure how to add the ffmpeg post-processing at the end or how it would all fit together. I want to add this trimming feature to remove some of the preamble on podcasts and get straight to the guest part of the show.

  


  The --embed-thumbnail is optional, and won't work anyway unless Atomic Parsley is present. FFmpeg often has trouble with Album Art anyway so I usually just use -vn on the final output file.

  


• Can't convert YUV video with ffmpeg

  3 février 2015, par Luca

  When i try to convert a file with ffmpeg (from command prompt) it always gives me :

  Segmentation fault (core dumped)

  The file name is left_432x240.yuv and I have downloaded it from here.

  the command i do is :

  ffmpeg -f rawvideo -vcodec rawvideo -s 432x240 -r 25 -pix_fmt yuv420p -i left_432x240.yuv -c:v libx264 -preset ultrafast -qp 0 output.mp4

  I have tried various option combination, but the result is always the same.

  doing :
  ffmpeg -i left_432x240.yuv

  produce :

  ffmpeg version 2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov 28 2013 16:44:43 with gcc 4.8 (Ubuntu/Linaro 4.8.1-10ubuntu9)
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab
  
    libavutil      52. 48.100 / 52. 48.100
  
    libavcodec     55. 39.100 / 55. 39.100
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [IMGUTILS @ 0xbff1adc0] Picture size 0x0 is invalid
  
  [IMGUTILS @ 0xbff1a8d0] Picture size 0x0 is invalid
  
  [IMGUTILS @ 0xbff1a950] Picture size 0x0 is invalid
  
  [rawvideo @ 0xa2aaee0] Could not find codec parameters for stream 0 (Video: rawvideo (I420 / 0x30323449), yuv420p, -4 kb/s): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  left_432x240.yuv: could not find codec parameters