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• FFmpeg droplet on Windows (converting EXR sequences to mp4)

  6 mars 2018, par KnK

  I’m trying to create a little droplet on my desktop in windows10 that creates mp4 files out of exr sequences. My idea would be to drag the first frame of the sequence and the droplet would recognize the sequence and cook a nice mp4 video out of it.

  My source sequence usually look like this :
  render.0001.exr
  render.0002.exr
  render.0003.exr
  etc.

  So far I’m doing this completely manually by typing this to a command line :

  ffmpeg.exe -gamma 2.2 -i render.%04d.exr -q:v 0 -r 25 video.mp4

  This command creates a nice quality gamma 2.2 mp4 which is perfect but manually setting it is obviously a hassle.

  After a little google-ing I’ve found this droplet :

  ffmpeg.exe -i %1 -y %~n1_preview.mp4

  Which is brilliant but doesn’t recognize file sequences so if I drop multiple files on it it will create single frame mp4 files. I guess it is missing the %04d but I have no idea where to put it or whether it needs some other parameter to work properly.

  Do you guys and girls have any idea how to format this droplet properly ? It would be a huge timesaver.

  Thanks in advance !

• Process GIF using FFmpeg libraries - can't find parser at av_parser_init

  24 novembre 2018, par natario

  I am playing with ffmpeg libs, namely libswscale and libavcodec for now. My goal is resize GIF files. From my ridiculous understanding, I think I need to

  • decode the GIF and get an AVFrame
  • process the frame with libswscale
  • encode again into GIF

  But I am stuck at step 1. Based on official sample at https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/decode_video.c , I need to get a parser :

  codec = avcodec_find_decoder(AV_CODEC_ID_GIF);
  
  parser = av_parser_init(codec->id);

  But no parser is found. I am not touching parser in my configure call, so I take all :

  Enabled parsers:
  
  aac                       cavsvideo                 dvbsub                    h263                      mpegvideo                 sipr                      xma
  
  aac_latm                  cook                      dvd_nav                   h264                      opus                      tak
  
  ac3                       dca                       dvdsub                    hevc                      png                       vc1
  
  adx                       dirac                     flac                      mjpeg                     pnm                       vorbis
  
  av1                       dnxhd                     g729                      mlp                       rv30                      vp3
  
  avs2                      dpx                       gsm                       mpeg4video                rv40                      vp8
  
  bmp                       dvaudio                   h261                      mpegaudio                 sbc                       vp9

  What am I doing wrong ? If this is the wrong approach, what is the correct one ?

• ffmpeg Unrecognized option 'preset' [closed]

  16 mai 2024, par Lalaluye

  Hello I just recently upgraded ffmpeg from 4.3.1 to 7.0 and getting the following error :

  


  my command is
ffmpeg -y -f image2pipe -framerate 24 -i pipe: -c:v libx264 -preset veryfast -crf 29 -pix_fmt yuv420

  


  and getting the below error :

  


  16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   built with gcc 7 (GCC)
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
configuration: --prefix=/local/p4clients/pkgbuild-JklBW/workspace/src/FFmpeg/build/private/install
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libavutil      59.  8.100 / 59.  8.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libavcodec     61.  3.100 / 61.  3.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libavformat    61.  1.100 / 61.  1.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libavdevice    61.  1.100 / 61.  1.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libavfilter    10.  1.100 / 10.  1.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libswscale      8.  1.100 /  8.  1.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg   libswresample   5.  1.100 /  5.  1.100
16 May 2024 06:43:28,979 [DEBUG] testIntent  (pool-7-thread-3) 
ffmpeg Unrecognized option 'preset'.



  


  Haven't found a resolution so far. Any help appreciated