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• compiling ffmpeg with decklink fails on debian

  16 avril 2019, par derhottevomdorf

  Following FFmpeg Wiki : Ubuntu. All dependencies, gcc, nasm, etc. should be up to date. I compiled ffmpeg successfully without Decklink library.

  Now adding --enable-decklink and the required includes from Decklink SDK I get the errors below.

  Any ideas ?

  CXX     libavdevice/decklink_common.o
  
  cc1plus: warning: command line option ‘-Wdeclaration-after-statement’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wmissing-prototypes’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wno-pointer-to-int-cast’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wno-pointer-sign’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-std=c11’ is valid for C/ObjC but not for C++
  
  In file included from libavdevice/decklink_common.cpp:54:0:
  
  libavdevice/decklink_common.h:90:5: error: ‘IDeckLinkAttributes’ does not name a type
  
       IDeckLinkAttributes *attr;
  
       ^~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘int decklink_get_attr_string(IDeckLink*, BMDDeckLinkAttributeID, const char**)’:
  
  libavdevice/decklink_common.cpp:84:5: error: ‘IDeckLinkAttributes’ was not declared in this scope
  
       IDeckLinkAttributes *attr;
  
       ^~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:84:26: error: ‘attr’ was not declared in this scope
  
       IDeckLinkAttributes *attr;
  
                            ^~~~
  
  libavdevice/decklink_common.cpp:86:28: error: ‘IID_IDeckLinkAttributes’ was not declared in this scope
  
       if (dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&attr) != S_OK)
  
                              ^~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘int decklink_select_input(AVFormatContext*, BMDDeckLinkConfigurationID)’:
  
  libavdevice/decklink_common.cpp:112:20: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
           res = ctx->attr->GetInt(attr_id, &supported_connections);
  
                      ^~~~
  
  libavdevice/decklink_common.cpp: In function ‘int ff_decklink_set_configs(AVFormatContext*, decklink_direction_t)’:
  
  libavdevice/decklink_common.cpp:152:18: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
           if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
  
                    ^~~~
  
  libavdevice/decklink_common.cpp:152:32: error: ‘BMDDeckLinkSupportsDuplexModeConfiguration’ was not declared in this scope
  
           if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
  
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:156:36: error: ‘bmdDeckLinkConfigDuplexMode’ was not declared in this scope
  
               res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
  
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:156:89: error: ‘bmdDuplexModeFull’ was not declared in this scope
  
               res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
  
                                                                                           ^~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:156:109: error: ‘bmdDuplexModeHalf’ was not declared in this scope
  
               res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
  
                                                                                                               ^~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘int ff_decklink_set_format(AVFormatContext*, int, int, int, int, AVFieldOrder, decklink_direction_t, int)’:
  
  libavdevice/decklink_common.cpp:190:5: error: ‘BMDDisplayModeSupport’ was not declared in this scope
  
       BMDDisplayModeSupport support;
  
       ^~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:254:45: error: ‘support’ was not declared in this scope
  
                                              &support, NULL) != S_OK)
  
                                               ^~~~~~~
  
  libavdevice/decklink_common.cpp:259:68: error: ‘support’ was not declared in this scope
  
                                                                     &support, NULL) != S_OK) {
  
                                                                      ^~~~~~~
  
  libavdevice/decklink_common.cpp:270:9: error: ‘support’ was not declared in this scope
  
       if (support == bmdDisplayModeSupported)
  
           ^~~~~~~
  
  libavdevice/decklink_common.cpp:270:20: error: ‘bmdDisplayModeSupported’ was not declared in this scope
  
       if (support == bmdDisplayModeSupported)
  
                      ^~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘void ff_decklink_cleanup(AVFormatContext*)’:
  
  libavdevice/decklink_common.cpp:434:14: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
       if (ctx->attr)
  
                ^~~~
  
  libavdevice/decklink_common.cpp:435:14: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
           ctx->attr->Release();
  
                ^~~~
  
  libavdevice/decklink_common.cpp: In function ‘int ff_decklink_init_device(AVFormatContext*, const char*)’:
  
  libavdevice/decklink_common.cpp:476:33: error: ‘IID_IDeckLinkAttributes’ was not declared in this scope
  
       if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
  
                                   ^~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:476:73: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
       if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
  
                                                                           ^~~~
  
  ffbuild/common.mak:63: recipe for target 'libavdevice/decklink_common.o' failed
  
  make: *** [libavdevice/decklink_common.o] Error 1

• stream_loop generate a big size video [FFMPEG]

  26 mars 2021, par Mouaad Abdelghafour AITALI

  I'm trying to loop a short video for e.g. 190 time to match the audio length, I use the following code :

  


  -y -stream_loop  190  -i input.mp4 -c copy output.mp4


  


  The command above works, but it generates video with huge size for video with 3min the size is 885 MB

  


  2021-03-25 23:52:30.445 5687-6253/maa.abc.music_maker D/XXX: LOOPING VIDEO SIZE ===> 885.845MB


  


  Or there's any way I can loop the video to match the audio length without using -stream_loop

  


• Batch process audio files and image files to create movie files by matching multiple wildcard values

  29 septembre 2022, par psychaudio

  I'm attempting to batch-process audio and image files to create video files using a Shell script with FFmpeg.

  


  

  1. The ffmpeg script works in Terminal :

  


  


  ffmpeg -loop 1 -i image.png -i audio.wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest output.mp4


  


  

  2. A nested for loop with wildcards works as a batch script :

  


  


  #!/bin/sh
for img in *.png; do
    for wav in *.wav; do
        ffmpeg -loop 1 -i $img -i $wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest ../mb/$img.mp4
    done
done


  


  The only problem here is that it creates more combinations than I need. I'd like to be able to match wildcard values and only mix those together. I'd like to be able to prepare the filenames to match in advance to make this easier : For example, only match 1.png with 1.wav to make 1.mp4, 2.png with 2.wav to make 2.mp4 and so on. I'm able to modify the script to match the wildcards in a Regex, but I'm not sure if there is a way to then execute the logic above. Here is what I am attempting :

  


  #!/bin/sh
img=*.png
wav=*.wav

if [[ ${img%.*} == ${wav%.*} ]];
    then
        ffmpeg -loop 1 -i $img -i $wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest $img.mp4;
    else
        echo "Failure"
    fi


  


  This begins by overwriting the image files, so it does not appear to work as planned. Is there a simpler way to do this ? Perhaps looping through images 1..5 in one folder and audio files 1..5 in another ?

  


  Thanks for any insights, and happy to provide more context (very new to this, so still learning).