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• From time to time ffmpeg makes my computer unable to restart

  6 juin 2022, par principal-ideal-domain

  I'm doing very time consuming ffmpeg video editing. That's why I put my commands into a .bat file and run them over night. Usually that works fine but from time to time when I look at the next moring a see an error message of this kind :

  


  

  


  From that state on I didn't find any good way to close the console. When I press the x in the top right corner, it freezes. When I try to kill it using the task manager nothing happens. Even explorer.exe can't be closed using the task manager. A shutdown won't do anything. During the last month I had this problem about three times and the only way I could close it was to long press the power button of the computer until it was turned off this hard way.

  


  Any ideas what to in such situations ? Or even better : Any ideas how to prevent those situations ? What is the reason for the error ? Do you understand the message ? By the way, when the computer is started again then at the next morining and I run the same bat file again everything works fine. So the same error does not repeat and the video is edited nicely.

  


  Edit : Now, about one week after posting this question the problem occurred many more times. It is very annoying. I guess it has to do with the external hard drive connected by USB. Sometimes it randomly interrupts the connection. That might be the reason for the behavior. However that be, I want to learn a solution how to deal with this in future. I don't want to always push the reset button of my computer. I want a proper way to shut it down.

  


• FFMPEG - make a stable & zero-padded frame counter

  2 octobre 2020, par L0Lock

  I use FFMPEG to print a frame counter on my videos, but I have two issues :

  


  

  


  

  1. The text stutters

  


  2. I'd like to have the possibility to have the number zero-padded (I.E. write 001 002 003 instead of 1 2 3).

  


  


  Code :

  


  @echo off
:again

cd /D %~p1

ffmpeg ^
    -i "%~nx1" ^
    -vf "drawtext=fontfile=arialbd.ttf: text='Frame \: %%{n}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: fontsize=40: box=1: boxcolor=black@0.4: boxborderw=8" ^
    -c:a copy ^
    "%~p1%~n1_framenumbered.mov"
if NOT ["%errorlevel%"]==["0"] goto:error
echo [92m%~n1 Done![0m

shift
if "%~1" == "" goto:end
goto:again

:error

echo [93mThere was an error. Please check your input file or report an issue on github.com/L0Lock/FFmpeg-bat-collection/issues.[0m
pause
exit 0

:end

cls
echo [92mEncoding succesful. This window will close after 10 seconds.[0m
timeout /t 10


  


  Solutions :

  


  

  • use `text='Frame : %eif:n:d:3' to get the zero-padded frame count (thanks to this answer)

  


  • use a monospace font (courrier new is common on Windows)

  


  • the script was failing to load the font, use the full path instead but without the drive (thanks to this answer) :

    

    • Do : /Windows/Fonts/courbd.ttf

    


    • Don't C:/Windows/Fonts/courbd.ttf nor use \

    


    


  


  


• Can not build ffmpeg with gpu acceleration on macOS

  21 février 2018, par Kirill Serebriakov

  I’m trying to use my GPU for video encoding/decoding operations on macOS.

  • OS : MacOS 10.12.5 (Sierra) //hackintosh if it matters
  • CUDA Toolkit 8.0 installed
  • NVidia GTX 1080 with latest web driver

  Followed this guides :

  • https://trac.ffmpeg.org/wiki/CompilationGuide/MacOSX
  • https://developer.nvidia.com/ffmpeg

  Config :

  ./configure --enable-cuda --enable-cuvid --enable-nvenc \
  
  --enable-nonfree --enable-libnpp \
  
  --extra-cflags=-I/Developer/NVIDIA/CUDA-8.0/include \
  
  --extra-ldflags=-L/Developer/NVIDIA/CUDA-8.0/lib

  Got this error :

  ERROR: cuvid requested, but not all dependencies are satisfied: cuda

  config.log - full configure log

  I did not install Video Codec SDK (not sure how to make it on macOS, just thought that it may come with cuda toolkit) and according to this page I have a lot of limitations on OSX.

  Is it possible on macOS ? Or this will work only for linux/windows ?