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• How do you pipe video from one tool to another on Raspberry Pi ? [closed]

  11 septembre 2024, par Spenser Spratlin

  I'm trying to pipe video from libcamera to ffmpeg to get a consistent video stream from a Pi Camera Module 2 to a Java Program

  


  I'm using the following

  


  

  • OpenJDK/JRE 17

  


  • Raspberry Pi 5 Model B

  


  • Debian 12 (bookworm)

  


  • Arm64

  


  


  Since Raspberry Pi changed their video framework, you can no longer call a single /dev/video0 device. You have to go through the Media Controller using libcamera or rpicam. I'm wondering how I can pipe the video created from libcamera or rpicam into a useable format to intake with ffmpeg.

  


• ffmpeg armv7s compile segmentation fault

  13 mai 2015, par Sergey92zp

  I use https://github.com/kewlbear/FFmpeg-iOS-build-script to compile ffmpeg,
  but when i try to compile, for armv7s architecture i have next error

  all other archs compile fine

  clang : error : unable to execute command : Segmentation fault : 11 clang :
  error : clang frontend command failed due to signal (use -v to see
  invocation) Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM
  3.6.0svn) Target : arm-apple-darwin14.3.0 Thread model : posix clang : note : diagnostic msg : PLEASE submit a bug report to
  http://developer.apple.com/bugreporter/ and include the crash
  backtrace, preprocessed source, and associated run script. clang :
  note : diagnostic msg :

  ---

  PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT : Preprocessed
  source(s) and associated run script(s) are located at : clang : note :
  diagnostic msg :
  /var/folders/zk/wj2cn08s26x64nlzk3_kjnv80000gn/T/vp8-c6ec27.c clang :
  note : diagnostic msg :
  /var/folders/zk/wj2cn08s26x64nlzk3_kjnv80000gn/T/vp8-c6ec27.sh clang :
  note : diagnostic msg :

  ******************** make : * [libavcodec/vp8.o] Error 254 make : * Waiting for unfinished jobs.... CC libavcodec/wmv2enc.o

  Couple months ago all compiled without any errors.
  Tried on couple versions of ffmpeg

  Here is Clang -v

  Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
  Target : x86_64-apple-darwin14.3.0 Thread model : posix

  and xcode version is Version 6.3.1 (6D1002)

• Android NDK - ffmpeg header files not found by compiler

  7 septembre 2015, par markt

  I am trying to use the ffmpeg libraries with Android NDK in the experimental plugin.

  I am attempting to compile this example :
  https://github.com/roman10/android-ffmpeg-tutorial/blob/master/android-ffmpeg-tutorial01/jni/tutorial01.c

  My problem is that the header files are not being found by the compiler :

  Error:(13, 32) libavcodec/avcodec.h: No such file or directory

  I added flags to build.grade :

  cppFlags += "-ilibavcodec -ilibavutil -ilibavformat -ilibswscale"
  
  ldFlags += "-llibavcodec -llibavutil -llibavformat -llibswscale"

  Which seems to keep lint happy, but not the compiler. (Not sure if I have done this right ?)

  I Have added the header files to the /jni folder :
  

  And build.grade looks like this :

  apply plugin: 'com.android.model.application'
  
  model {
  
      android {
  
          compileSdkVersion = 23
  
          buildToolsVersion = "23.0.1"
  
  
  
          defaultConfig.with { 
  
              applicationId = "roman10.tutorial.android_ffmpeg_tutorial01"
  
              minSdkVersion.apiLevel = 10
  
              targetSdkVersion.apiLevel = 23
  
  
  
          }
  
      }
  
  
  
      compileOptions.with {
  
          sourceCompatibility = JavaVersion.VERSION_1_7
  
          targetCompatibility = JavaVersion.VERSION_1_7
  
      }
  
  
  
      android.buildTypes {
  
          release {
  
              minifyEnabled = false
  
              proguardFiles += file('proguard-rules.pro')
  
          }
  
      }
  
  
  
  
  
      android.ndk {
  
          moduleName = "tutorial01"
  
          ldLibs += ["android","log","jnigraphics","z"]
  
          cppFlags += "-ilibavcodec -ilibavutil -ilibavformat -ilibswscale"
  
          ldFlags += "-llibavcodec -llibavutil -llibavformat -llibswscale"
  
      }
  
  }
  
  
  
  dependencies {
  
      compile fileTree(dir: 'libs', include: ['*.jar'])
  
      compile 'com.android.support:support-v4:23.0.1'
  
  }

  Thanks.