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• 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

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

  20 avril 2023, 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

  


• avdevice/decklink : fix MSVC build issues

  6 mai 2017, par Aaron Levinson

  avdevice/decklink : fix MSVC build issues
  Purpose : Made minor changes to get the decklink avdevice code to build
  
  using Visual C++.
  Notes : Made changes to configure per Hendrik Leppkes's review of first
  
  and second versions of patch.  Also made slight alterations per Marton
  
  Balint's reviews.
  Comments :
  — configure : Added if enabled decklink section and setting
  
     decklink_indev_extralibs and decklink_outdev_extralibs here for
  
     both mingw and Windows.  Also eliminated the setting of these
  
     variables in the mingw section earlier in the file.
  — libavdevice/decklink_common.cpp : Switched the order of the include
  
     of libavformat/internal.h to workaround build issues with Visual
  
     C++.  See comment in file for more details.
  — libavdevice/decklink_dec.cpp :
  
  a) Rearranged the include of libavformat/internal.h (for reasons as
  
     described above).
  
  b) Made slight alteration to an argument for call to av_rescale_q() to
  
     workaround a compiler error with Visual C++.  This appears to only
  
     be an issue when building C++ files with Visual C++.  See comment
  
     in code for more details.
  — libavdevice/decklink_enc.cpp : Rearranged the include of
  
     libavformat/internal.h (for reasons as described above).
  Signed-off-by : Aaron Levinson <alevinsn@aracnet.com>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] configure
  • [DH] libavdevice/decklink_common.cpp
  • [DH] libavdevice/decklink_dec.cpp
  • [DH] libavdevice/decklink_enc.cpp