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• 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.

• Revision 8281a19465 : vpxenc.sh : Add basic vp9 multithread encode test. - Change default real time sp

  24 juin 2015, par Tom Finegan

  Changed Paths :
   Modify /test/tools_common.sh

  
   Modify /test/vpxenc.sh

  
  
  vpxenc.sh : Add basic vp9 multithread encode test.

   Change default real time speed to -6.
   Add vpxenc_vp9_webm_rt_multithread, which encodes
  niklas_1280_720_30.y4m with 2 to 4 threads using 2 to 4
  tile columns.

  Change-Id : I4d86c3360aec67ae5d1ba82eb6e0f0be8068b5af

• VLC HLS read input at native frame rate for real time streaming

  1er avril 2016, par Optio

  I make http live streaming (hls) server with NodeJS. Now i have two variants : ffmpeg and VLC.
  With ffmpeg I know command -re (Read input at native frame rate. Mainly used to simulate a grab device or live input stream (e.g. when reading from a file)). I need this for real time streaming (pseudo-live channel) from file.

  As result I expected sign "Live" on the video player in browser, and not be able to make rewind over video (video.js player or hls.js library)

  But how I can do this with VLC ? Maybe you know some commands ?