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• How to convert large jpgs to video ?

  15 juin 2014, par Paul H

  Whenever I try the command on my 15000 x 10840px images

  ffmpeg -y -r 1 -i File01.jpg -c:v libx264 -tune stillimage -pix_fmt yuv420p out.mp4

  I get the failing result :

  [swcaler @ 000000000347fe0] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0000000002da3c0] using SAR=1/1
  
  [libx264 @ 0000000002da3c0] frame MP size (938x678) > level limit (36864)

  and a corrupt file which cant be read.
  Is there a maximum size of the resolution that can be created ?

• In FFmpeg, using -filter_complex, how can I overlay and blend at the same time ?

  5 mars 2014, par Kristian Boruff

  My code works to combine three videos, resize the videos to 1920X1080, resize the watermark to the correct size, and then overlays the watermark to the lower left hand side. Then converts to the intended codecs for Youtube.
  My question is how do I Blend at the same time using the -filter_complex workflow ?
  Currently, I have the following workflow that does everything but set the opacity

  ffmpeg -y -i fancy movie.mov -i logo.png -i in.mov -i out.mov -c:v libx264 -crf 18 -b:v 50000k -preset veryfast -tune film -profile:v high -x264opts cabac=1:keyint=16:bframes=2:keyint_min=15 -c:a libvo_aacenc -ab 128K -ar 48000 -filter_complex "[0:0] scale=1920X1080 [main]; [2:0] scale=1920X1080 [start]; [3:0] scale=1920X1080 [end]; [start] [2:1] [main] [0:1] [end] [3:1] concat=n=3:v=1:a=1 [prog]; [1:0] scale=480:90 [wm]; [prog] [wm] overlay=36:main_h-overlay_h-45" fart.mp4

  I'm trying to add "blend=all_opacity=0.7" in the last step so the watermark will screen against the background. If I just add

  [prog] [wm] overlay=36:main_h-overlay_h-45, blend=all_mode='overlay':all_opacity=0.7" fart.mp4

  I get the error, Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_blend_6

  If I try a semicolon instead,

  [prog] [wm] overlay=36:main_h-overlay_h-45; blend=all_mode='overlay':all_opacity=0.7

  I get the error, Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_blend_6 which makes me think that it's expecting something like [input 1] [input 2] blend command [output]. The problem is that I need it to overlay and blend.

  I tried simplifying the code to just test if the blend operation was working properly.

  ffmpeg -i test.mp4 -i logo.png -filter_complex "[0:0] scale=1920x1080 [wm]; [1:0] scale=1920x1080 [prog], [wm][prog] blend=all_mode='overlay':all_opacity=0.7" fart.mp4

  I got the error First input link top parameters (size 1920x1080, SAR 1:1) do not match the corresponding second input link bottom parameters (1920x1080, SAR 243:80)
  Failed to configure output pad on Parsed_blend_2

  So, in addition to the trouble with combining of filters, I'm also having an issue with resizing the watermark as FFMpeg sees it as a different aspect ratio than the other videos.

  This is my second day with FFmpeg, so any help would be appreciated.

  I'm currently working with FFMpeg version N-61061-gf34cceb

• ffmpeg hevc (x265) encoding

  3 septembre 2015, par luca

  i’m trying to use h265 encoder in ffmpeg library but give me this error :

  Cannot open libx265 encoder.

  this is my code :

  formatContext = avformat_alloc_context();
  
  videoStream = avformat_new_stream(formatContext,0);
  
  if(!videoStream ) {
  
      //error
  
      return;
  
  }
  
  av_init_packet(&packet);
  
  codecContext=videoStream->codec;
  
  codecContext->codec_type = AVMEDIA_TYPE_VIDEO;
  
  codecContext->width = width;
  
  codecContext->height = height;
  
  codecContext->time_base.den = fps;
  
  codecContext->time_base.num = 1;
  
  codecContext->pix_fmt = AV_PIX_FMT_YUV420P;
  
  codecContext->codec_id = AV_CODEC_ID_HEVC;
  
  AVDictionary *param = 0;
  
  av_dict_set(&param, "x265-params", "qp=20", 0);
  
  av_dict_set(&param, "preset", "ultrafast", 0);
  
  av_dict_set(&param, "tune", "zero-latency", 0);
  
  av_dict_set(&param, "qmin", "0", 0);
  
  av_dict_set(&param, "qmax", "69", 0);
  
  av_dict_set(&param, "qdiff", "4", 0);
  
  codec = avcodec_find_encoder(codecContext->codec_id);
  
  if (!codec) {
  
      //codec not found
  
      return;
  
  }
  
  int rt = avcodec_open2(codecContext, codec, &param); // <----- fails here
  
  if (rt < 0) {
  
      // fails here!!
  
      return;
  
  }

  This code works for h264 encoder, anyone know why doesn’t work with hevc ?