Recherche avancée

Sur d’autres sites (9373)

• ffmpeg - convert video into individual frame image files ? [closed]

  2 janvier 2021, par MrFunreal

  i am trying to turn every single frame of a video file into png files using ffmpeg.
i have found several guides on how to do that, most of which look the same, by doing this :

  


  


  ffmpeg -i vid.mp4 frames/out%03d.png

  


  


  However, this does not work. FFmpeg for some reason just replaces the "%0" of the output file with the entire path of the bat file and then tells me that's wrong, like so :

  


  


  [image2 @ 000002c6aa87f680] Could not open file :
frames/outG :\Videos\vid_to_frames\3_video_to_frames.bat3d.jpg
av_interleaved_write_frame() : I/O error

  


  


  If i remove the "%0" of the output file it creates a single frame and gives me an error, telling me i need to put the "%03d" into the name, which doesn't work.

  


  


  [image2 @ 000001dc9a09fd40] Could not get frame filename number 2 from
pattern '$filename3d.png'. Use '-frames:v 1' for a single image, or
'-update' option, or use a pattern such as %03d within the filename.
av_interleaved_write_frame() : Invalid argument

  


  


  Is this just broken ?
I found about 20 guides on how to do it, all of which use this exact same method and it just doesn't work.

  


  Does anyone know another way to do this via ffmpeg ? (it must be via ffmpeg)

  


• Taking a high resolution picture with FFMPEG and Webcam

  13 mai 2016, par user2088176

  I have a Microsoft LifeCam VX-3000 and I want to capture a single image from this video source.

  I have tried DirectShow :

  ffmpeg -f dshow -video_size 1280x960 -i video="Microsoft LifeCam VX-3000" -vframes 1 file.jpg
  
  
  
  [dshow @ 01D69340] Could not set video options

  and
  Microsoft WDM Image Capture :

  ffmpeg -f vfwcap -video_size 1280x960 -i video="Microsoft LifeCam VX-3000" -vframes 1 file.jpg
  
  
  
  [vfwcap @ 01D79340] Could not set Video Format.

  If I lower the video size to 640x480, it works, but every sites tells me that 640x480 is the maximum video resolution, but the still picture maximum resolution is 1280x960. Like here

  I would like to capture the image at the highest resolution possible. Is there a way to do it with FFMPEG ? What command-line options should I give it ?

  Thank you very much.

• avcodec/libjxlenc : add option to disable xyb encoding

  11 février 2024, par Leo Izen

  avcodec/libjxlenc : add option to disable xyb encoding
  Add an AVOption to the libjxl encoder wrapper, which exposes the flag
  
  uses_original_profile in libjxl. For highly unusual ICC profiles where
  
  the target needs to stay in the original space, this can be useful.
  Signed-off-by : Leo Izen <leo.izen@gmail.com>
  

  • [DH] libavcodec/libjxlenc.c
  • [DH] libavcodec/version.h