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• Piping output of youtube-dl to a script using ffmpeg looks ok using echo but returns an error when executing

  29 mai 2020, par I0_ol

  I am trying to use youtube-dl to get the urls of some videos and then pipe the resulting urls into the input of my script. So in my terminal I do

  



  youtube-dl --ignore-config -iga ~/Desktop/youtube/videolist.txt | myscript.sh


  



  In my script I define things as

  



  command='ffmpeg'        
inputArgs='-i'              
outputArgs='-c:v libx264 -preset ultrafast -qp 0'       
directory="${HOME}/Desktop/Videos/"
output="video${count}"      
extension='mp4'         


  



  I test it with echo to make sure everything appears in the correct order.

  



  echo "${command}" "${inputArgs}" "${input}" "${outputArgs}" \
"${directory}""${output}${count}"."${extension}"


  



  And the output from that looks correct. But when I try to run the same thing without the preceding echo command, i.e.,

  



  "${command}" "${inputArgs}" "${input}" "${outputArgs}" \
"${directory}""${output}${count}"."${extension}"


  



  I get an error message that says

  



  


  At least one output file must be specified.

  


  



  So it seems pretty obvious to me that I'm doing something wrong when attempting to execute it.

  



  I have tried :

  



  

  • quoting the entire line as a whole

  


  • quoting different sections together

  


  • using the exec command in front of everything

  


  



  No matter what I do, an error occurs at some point in the process. I know it's something simple I'm doing wrong. Would someone please enlighten me as to what that might be ?

  



  I feel very strongly that the . shouldn't just be in the middle of everything like that, but I really don't know.

  



  Again, everything looks as it should when I run echo before the string of shell parameters.

  



  If more of the script I'm using is needed to understand what I'm talking about, that is not a problem.

  


• Piping output of youtube-dl to a script using ffmpeg looks ok using echo but returns an error when executing

  22 février 2016, par user556068

  I am trying to use youtube-dl to get the urls of some videos and then pipe the resulting urls into the input of my script. So in my terminal I do

  youtube-dl --ignore-config -iga ~/Desktop/youtube/videolist.txt | myscript.sh

  In my script I define things as

  command='ffmpeg'        
  
  inputArgs='-i'              
  
  outputArgs='-c:v libx264 -preset ultrafast -qp 0'       
  
  directory="${HOME}/Desktop/Videos/"
  
  output="video${count}"      
  
  extension='mp4'         

  I test it with echo to make sure everything appears in the correct order.

  echo "${command}" "${inputArgs}" "${input}" "${outputArgs}" \
  
  "${directory}""${output}${count}"."${extension}"

  And the output from that looks correct. But when I try to run the same thing without the preceding echo command, i.e.,

  "${command}" "${inputArgs}" "${input}" "${outputArgs}" \
  
  "${directory}""${output}${count}"."${extension}"

  I get an error message that says

  At least one output file must be specified.

  So it seems pretty obvious to me that I’m doing something wrong when attempting to execute it.

  I have tried :

  • quoting the entire line as a whole
  • quoting different sections together
  • using the exec command in front of everything

  No matter what I do, an error occurs at some point in the process. I know it’s something simple I’m doing wrong. Would someone please enlighten me as to what that might be ?

  I feel very strongly that the . shouldn’t just be in the middle of everything like that, but I really don’t know.

  Again, everything looks as it should when I run echo before the string of shell parameters.

  If more of the script I’m using is needed to understand what I’m talking about, that is not a problem.

• Include Shared library .so in android studio

  15 avril 2016, par Spartan

  I extracted ffmpeg in ndk’s source folder then compiled it there only for that I followed this :http://www.roman10.net/2013/08/18/how-to-build-ffmpeg-with-ndk-r9/ and successfully generated android folder with arm/lib and arm/include files.

  After that I created one Android.mk file in $NDK/sources/ffmpeg/android/arm and one Android.mk in my android project(src/main/jni folder).

  My src/main/jni/Android.mk is like this :

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  
  
  LOCAL_MODULE    := tutorial01
  
  LOCAL_SRC_FILES := tutorial01.c
  
  LOCAL_LDLIBS := -llog -ljnigraphics -lz
  
  LOCAL_SHARED_LIBRARIES := libavcodec
  
  
  
  include $(BUILD_SHARED_LIBRARY)
  
  $(call import-module,ffmpeg-3.0.1/android/arm)

  and $NDK/sources/ffmpeg/android/arm/Android.mk is :

  LOCAL_PATH:= $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavcodec
  
  LOCAL_SRC_FILES:= lib/libavcodec-57.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)

  I updated my build.gradle like this and successfully generated jniLibs with .so files but I am getting libavcodec/avcodec.h : No such file or directory while building project.

  import org.apache.tools.ant.taskdefs.condition.Os
  
  
  
  apply plugin: 'com.android.model.application'
  
  
  
  model {
  
      android {
  
          compileSdkVersion = 23
  
          buildToolsVersion = "23.0.2"
  
  
  
          defaultConfig.with {
  
              applicationId = "com.example.spartan.hello"
  
              minSdkVersion.apiLevel = 18
  
              targetSdkVersion.apiLevel = 23
  
              versionCode = 1
  
              versionName = "1.0"
  
          }
  
      }
  
      android.buildTypes {
  
          release {
  
              minifyEnabled = false
  
              proguardFiles.add(file('proguard-android.txt'))
  
          }
  
      }
  
  
  
      android.sources {
  
          main {
  
              jni {
  
                  source {
  
                      srcDirs = []
  
                  }
  
  
  
              }
  
  
  
          }
  
  
  
          main {
  
              jniLibs {
  
                  source {
  
                      srcDirs = ['src/main/libs']
  
                  }
  
              }
  
          }
  
  
  
      }
  
  
  
      android.ndk {
  
          moduleName = "tutorial01"
  
          stl = 'gnustl_shared'
  
      }
  
  }
  
  
  
  
  
  task ndkBuild(type: Exec) {
  
      if (Os.isFamily(Os.FAMILY_WINDOWS)) {
  
          commandLine 'ndk-build.cmd', '-C', file('src/main').absolutePath
  
      } else {
  
          commandLine 'ndk-build', '-C', file('src/main').absolutePath
  
      }
  
  }
  
  tasks.withType(JavaCompile) {
  
      compileTask -> compileTask.dependsOn ndkBuild
  
  }
  
  
  
  dependencies {
  
      compile fileTree(include: ['*.jar'], dir: 'libs')
  
      testCompile 'junit:junit:4.12'
  
      compile 'com.android.support:appcompat-v7:23.2.1'
  
  }

  and loading them in my activity like this :

  static {
  
          System.loadLibrary("tutorial01");     
  
          System.loadLibrary("avcodec-57");   
  
      }

  I am new to NDK so, Is it ok if we manually paste header files in jni folder ?