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• configure : Don’t explicitly disable PIC for windows targets

  28 mai 2013, par Martin Storsjö

  configure : Don’t explicitly disable PIC for windows targets
  This reverts e08c946c6 and 05165c2f7a. The actual intention of
  
  e08c946c6 was to fix shared library builds for arm/win32, which
  
  can also be accomplished in other ways.
  Disabling pic on those platforms broke inline assembly on cygwin/64
  
  (since some inline assembly requires knowing whether we are building
  
  as PIC or not), and might also break inline assembly on other
  
  compilers on windows.
  As a side-effect, this unfortunately brings back all the warnings
  
  about PIC not having any effect on that platform.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] configure

• set variable and call result during FOR loop ; batch script windows

  19 juin 2018, par Doons

  I have read several posts here on Stackoverflow about binding a variable during a FOR loop. While I figure most of the help provided here has been for Linux/Unix, I’m reaching out for help with batch scripting in Windows. My main goal is to extract the "date created" from a mp4-file and "overlay the date on my video" using ffmpeg (and or ffprobe).

  I have experimented a lot, but my latest attempt has been trying to bind the result from ffprobe onto a variable, and use the variable later. My latest and simplest attempt looks like this :

  SETLOCAL ENABLEDELAYEDEXPANSION
  
  for %%a in ("*.mp4") do (
  
  for /F "tokens=*" %%G in ('ffprobe -v quiet %%a -print_format compact -show_entries format_tags=creation_time') do (
  
  set DateC=%%G
  
  echo !DateC!)
  
  )

  I was hoping to be able to print the tag result from ffprobe using that code, but apparently not. So helping me bind that variable, and how to call it again later inside the following code snippet in Windows, would be deeply appreciated :

   ffmpeg -i %%a -filter_complex "drawtext=fontfile=/Windows/Fonts/Arial.ttf:x=28:y=650:fontsize=45:fontcolor=white:box=1:boxcolor=black@0.4:text='!DateC!'" -c:a copy output.mp4

  I must also mention I’ve seen the following code on StackOverflow :

   ffmpeg -i %%a -filter_complex "drawtext=fontfile=/Windows/Fonts/Arial.ttf:x=28:y=650:fontsize=45:fontcolor=white:box=1:boxcolor=black@0.4:text='%{metadata\:creation_time}'" -c:a copy output.mp4

  But I have the same problem making Windows recognize and print the metadata.

  I am certain the file in question contains this metadata.

• Windows Ffmpeg - send audio to sound card's output

  30 mars 2021, par halitsafa

  I have a sound card (Behringer UMC202HD) which connected to a Windows 10 computer by usb cable, i am able to recieve audio from input device with the following ffmpeg command :
ffmpeg -f dshow -i audio="IN 1-2 (BEHRINGER UMC 202HD 192k)" -map_channel 0.0.0 -c:a pcm_s24le first_channel.wav -map_channel 0.0.1 -c:a pcm_s24le second_channel.wav

  


  But i can't send audio to sound card's output with the ffmpeg, is there any way to do this ? if there is, how can i do it ?

  


  Linux version (pseudo command) of what i'm trying to do in Windows :

  


  ffmpeg -i my_input.wav -f alsa alsa.behringer_out