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• Error "sys/videoio.h - not found" OpenCV 3.1.0

  9 juin 2020, par Jefferson Rodriguez

  
I using Elementary OS and I'm trying to install OpenCV 3.1.0, I follow the instructions of http://docs.opencv.org/3.0-beta/doc/tutorials/introduction/linux_install/linux_install.html
  
Also, I have installed libav 11.7 and ffmpeg 3.1.3
  
but, after cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
I get :
  
— Looking for linux/videodev.h
  
— Looking for linux/videodev.h - found
  
— Looking for linux/videodev2.h
  
— Looking for linux/videodev2.h - found
  
— Looking for sys/videoio.h
  
— Looking for sys/videoio.h - not found
  
— Looking for libavformat/avformat.h
  
— Looking for libavformat/avformat.h - found
  
— Looking for ffmpeg/avformat.h
  
— Looking for ffmpeg/avformat.h - not found
  
— checking for module 'libgphoto2'
  
— package 'libgphoto2' not found
  
And after make,
  
I get :
  
../../lib/libopencv_videoio.so.3.1.0 : referencia a av_frame_alloc&#x27; sin definir <br />&#xA;../../lib/libopencv_videoio.so.3.1.0: referencia aav_frame_free' sin definir
  
collect2 : error : ld returned 1 exit status
  
make[2] : * [bin/opencv_test_video] Error 1
  
make[1] : * [modules/video/CMakeFiles/opencv_test_video.dir/all] Error 2

  

  



  someone who can help me ?

  


• Getting "moov atom not found" error on linux but not windows/mac ?

  22 juin 2020, par flynnstone9

  Hey I have a tool I built that makes a video for me and it works locally on a mac / windows machine. I setup a digital ocean ubuntu server to host my app and the final video is giving a "moov atom not found" when running ffprobe output.mp4.

  


  The way the video is being created is thru this cmd :

  


  


  ffmpeg -i 1.mp4 -i 3.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1" output.mp4

  


  


  I'm using slightly different versions of ffmpeg on linux v Mac. I was running 4.3-2ubuntu0 18.04.sav0 on linux and ffmpeg version 4.2.2 on Mac.

  


  Is this a linux specific issue or is it something with the video container I'm missing ?

  


• Getting "Error while decoding stream #0:0 : Invalid data found when processing input" when using ffmpeg to convert tga to mp4

  22 juin 2020, par Calvin Godfrey

  I've used ffmpeg to convert a bunch of tga files into an mp4 just fine for a few weeks, but it broke for no apparent reason earlier today. I have a pastebin with -loglevel debug here, but the command I use is the same as the one that has worked before — ffmpeg -framerate 60 -i triangle%03d.tga output.mp4, and now it's broken.

  


  The tga files are manually created by a C program that I wrote, but I don't think it's a problem with the file header/format because it hasn't been a problem with ffmpeg before before and I can open the tga files fine with eog and a tga viewer on Windows. Just in case it matters, here's the start of a hexdump for one of the files :

  


  0000000 0000 0002 0000 0000 0000 0000 0780 0438
0000010 2018 ceeb eb87 87ce ceeb eb87 87ce ceeb
0000020 eb87 87ce ceeb eb87 87ce ceeb eb87 87ce
0000030 ceeb eb87 87ce ceeb eb87 87ce ceeb eb87
0000040 87ce ceeb eb87 87ce ceeb eb87 87ce ceeb
0000050 eb87 87ce ceeb eb87 87ce ceeb eb87 87ce
0000060 ceeb eb87 87ce ceeb eb87 87ce ceeb eb87
0000070 87ce ceeb eb87 87ce ceeb eb87 87ce ceeb
0000080 eb87 87ce ceeb eb87 87ce ceeb eb87 87ce
0000090 ceeb eb87 87ce ceeb eb87 87ce ceeb eb87


  


  Would appreciate any help on fixing the ffmpeg (or alternative ways to convert tga to mp4).