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• Make a video file with the song cover for each song in a folder [closed]

  19 novembre 2024, par Nathan Kaufmann

  I have a folder full of wav audio files, and I would want, using ffmpeg in a batch file, to output as many video files as there is songs, with a still image of the cover, with the highest possible audio quality as permitted by ffmpeg. Additionally I would want the metadata (title, artist, album and year) to be copied to the corresponding video file.

  


  For now I have the command :
ffmpeg -f lavfi -i color=c=black:s=640x480 -i song.wav -c:v libx264 -tune stillimage -pix_fmt yuv420p -shortest -c:a aac -ar 96000 -b:a -metadata title="My title" 1000000000k output.mp4

  


  But it only makes a black video with the song, with the highest quality sound I could set, and it changes the title but I couldn't find how to change it to the song's title. Also for now I don't know how to automate it for a whole folder.

  


• ffplay shows no video from Grass Valley KMX in HDMI input even though HDMI from scope bars displays just fine

  14 juin 2023, par Scott Wilkerson

  I'm trying to replace an unsupported video input player that uses a Decklink card to superimpose video on an iControl widget. I was able to get this to work with a Decklink Mini Recorder 4K card with ffplay using this command :

  


  ffplay -f dshow -video_size 1280x720 -left 631 -top 19 -rtbufsize 702000k -framerate 59.94 -i video="Decklink Video Capture":audio="Decklink Audio Capture" -noborder -hide_banner -alwaysontop

  


  I used bars and tone from a handheld scope to test the video window and it worked great. When I put it into production with input from a Grass Valley KMX it only displays black. I can see the video, chroma, audio etc in the video window stats. The KMX video can display just fine with the Black Magic Media Express app. Any ideas what might be tripping it up ?

  


  I tried -videoinput HDMI, which did not work.

  


• Android FFMPEG + SDL2 Full screen issue (Video)

  15 janvier 2018, par byungkyu

  I make video player, use ffmpeg, SDL2.
  when I compile ffmpeg, I add —disable-filters, and I scale video using SDL.

  VideoPicture *vp;
  
  
  
  vp = &is->pictq[is->pictq_windex];
  
  Uint32 flags(SDL_GetWindowFlags(vp->screen));
  
  flags ^= SDL_WINDOW_FULLSCREEN_DESKTOP;
  
  SDL_SetWindowFullscreen(vp->screen, flags);
  
  int w = 640, h = 480; // TODO: UPDATE ME! ;)
  
  if ((flags & SDL_WINDOW_FULLSCREEN_DESKTOP) != 0)
  
  {
  
      LOGI("toggleFullscreen 1189");
  
      SDL_SetHint(SDL_HINT_RENDER_LOGICAL_SIZE_MODE, "overscan");
  
      SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
  
      SDL_RenderSetLogicalSize(vp->renderer, w, h);
  
  }
  
  else
  
  {
  
      LOGI("toggleFullscreen 1195");
  
      SDL_SetWindowSize(vp->screen, w, h);
  
  }

  but this code show black bar, upper side and down side.
  how to make full screen, no black, and expand video height ?