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• Using ffmpeg without hardware acceleration (C++)

  13 février 2018, par MadMarky

  I’m working on an application (c++/Linux) that uses the ffmpeg 3.4 libraries to do video encoding. Since version 3.3 hardware acceleration is enabled by default if the platform supports it. The graphics card in my dev system has hardware acceleration support, but the tool also has to run on older systems that do not.
  How can i configure ffmpeg to disable hardware acceleration for video encoding ? There is a ton of info about enabling, but i just cant find how to disable it.

  ps.
  There already is a similar question : How to turn off ffmpeg hardware acceleration but its a year old and unfortunately still unanswered.

• how to use multiple videos with background in it with color correction

  12 novembre 2022, par Muneer

  Hey i am try to create a batch input output file with that so i can easliy add my video in to a frame with top header and footer GIF for youtube subscribe and credit in the right side my logo and card should be display and the left the actual video should be shared to avoid video theifs please help me out

  


  look at my code but not working
for %%a in ("_input\*.*") do ffmpeg -loop 1 -i image.png -i "%%a"  -filter_complex "overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:shortest=1; movie=111.mp4" -codec:a copy -movflags +faststart _output\%%~na.mp4

  


  look at the image what i acutaly want any kind of help would be much much appreciated thank you[]

  


• FFMPEG & HW Acceleration Unable to find a suitable output format for 'cuda' ?

  10 juillet 2022, par user2522885

  I'm curious about FFMPEG and GPU hardware acceleration. My Windows 10 system uses the Asus / nVidia GTX 760 graphics card and Intel i5-2500K CPU. My graphics card claims to be of the Kepler architecture with CUDA 3.0 as shown here.

  


  Instead of going through the hassles of compiling FFMPEG with hw acceleration support i downloaded a pre-compiled binary from here and here.

  


  Next, i tried running a test with hw acceleration options as recommended here :

  


  ffmpeg -y -vsync 0 -i "input.mkv" -hwaccel cuda -hwaccel_output_format cuda -c:a copy -c:v h264_nvenc "output.mp4"


  


  I then received the error message :

  


  


  [NULL @ 000002257f4af540] Unable to find a suitable output format for 'cuda'

  


  cuda : Invalid argument

  


  


  What am i doing wrong ? For the record i install the CUDA setup file but it made no difference. I am using the latest nVidia drivers.

  


  UPDATE

  


  I modified the line to :

  


  ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -i "input.mkv" -c:a copy -c:v h264_nvenc "output.mp4" 


  


  The new error message is :

  


  


  [h264_nvenc @ 00000191f5c8d400] Lossless encoding not supported

  


  [h264_nvenc @ 00000191f5c8d400] Provided device doesn't support required NVENC features Error initializing output stream 0:0 — Error
while opening encoder for output stream #0:0 - maybe incorrect
parameters such as bit_rate, rate, width or height