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• java.lang.UnsatisfiedLinkError : Couldn't load ffmpeg library findLibrary returned null

  22 février 2017, par Muthukumar Subramaniam

  I am new to live streaming from android to youtube in android. I mentioned my Project Structrue and build the gradle file in android. FFmpeg library could not load in runtime.

  Note : I am working in windows 10 and android studio 2.1.2

      apply plugin: 'com.android.application'
  
  
  
  android {
  
      compileSdkVersion 23
  
      buildToolsVersion "23.0.1"
  
  
  
      packagingOptions {
  
          exclude 'META-INF/DEPENDENCIES'
  
          exclude 'META-INF/NOTICE'
  
          exclude 'META-INF/NOTICE.txt'
  
          exclude 'META-INF/LICENSE'
  
          exclude 'META-INF/LICENSE.txt'
  
      }
  
  
  
      defaultConfig {
  
          applicationId "com.ephron.mobilizerapp"
  
          minSdkVersion 14
  
          targetSdkVersion 23
  
          versionCode 1
  
          versionName "1.4"
  
          multiDexEnabled true
  
      }
  
      dexOptions {
  
          javaMaxHeapSize "4g"
  
      }
  
  
  
  
  
      buildTypes {
  
          release {
  
              minifyEnabled false
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
          }
  
      }
  
      sourceSets {
  
          main {
  
              assets.srcDirs = ['src/main/assets', 'src/main/assets/']
  
  
  
          }
  
      }
  
      sourceSets { main {
  
          jni.srcDirs = ['src/main/jni', 'src/main/jni/libs']
  
          jni.srcDirs = ['libs']
  
          jni.srcDirs = []
  
      } }
  
  }
  
  
  
  dependencies {
  
      testCompile 'junit:junit:4.12'
  
      compile files('libs/httpclient-4.5.2.jar')
  
      compile files('libs/httpcore-4.4.4.jar')
  
      compile files('libs/httpmime-4.2.1.jar')
  
      compile files('libs/YouTubeAndroidPlayerApi.jar')
  
      compile 'com.android.support:appcompat-v7:23.1.0'
  
      compile 'com.google.android.gms:play-services:10.0.1'
  
      compile 'com.google.code.gson:gson:2.2.2'
  
      compile 'com.google.firebase:firebase-messaging:9.2.0'
  
      compile 'testfairy:testfairy-android-sdk:1.+@aar'
  
      compile 'com.android.support:multidex:1.0.0'
  
      compile 'com.mcxiaoke.volley:library:1.0.19'
  
      compile 'com.squareup.picasso:picasso:2.5.2'
  
      compile 'cn.aigestudio.wheelpicker:WheelPicker:1.1.2'
  
      compile 'com.google.android.gms:play-services-maps:10.0.1'
  
      compile 'com.google.apis:google-api-services-youtube:v3-rev182-1.22.0'
  
      compile 'com.google.api-client:google-api-client-android:1.22.0'
  
      compile 'com.google.http-client:google-http-client-gson:1.19.0'
  
      compile 'com.google.android.gms:play-services-ads:10.0.1'
  
      compile 'com.google.android.gms:play-services-auth:10.0.1'
  
      compile 'com.google.android.gms:play-services-gcm:10.0.1'
  
      compile files('libs/ffmpeg-android.jar')
  
  }
  
  apply plugin: 'com.google.gms.google-services'

  My Project Structure mentioned below Link

  https://www.screencast.com/t/E0TFsMUi1

  Application.mk file
  
  
  
      APP_OPTIM := release
  
  APP_ABI := all
  
  APP_STL := gnustl_static
  
  APP_CPPFLAGS := -frtti -fexceptions

  Android.mk file

     #
  
  # Copyright (c) 2014 Google Inc.
  
  #
  
  # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
  
  # in compliance with the License. You may obtain a copy of the License at
  
  #
  
  # http://www.apache.org/licenses/LICENSE-2.0
  
  #
  
  # Unless required by applicable law or agreed to in writing, software distributed under the License
  
  # is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  
  # or implied. See the License for the specific language governing permissions and limitations under
  
  # the License.
  
  
  
  
  
  # set NDK_PROJECT_PATH := D:/MobilizerApp/app/src/main/jni
  
  
  
  WORKING_DIR := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_PATH := $(WORKING_DIR)/../third_party/lame/libmp3lame
  
  LOCAL_MODULE    := lame
  
  LOCAL_C_INCLUDES := $(WORKING_DIR)/../third_party/lame/libmp3lame \
  
                      $(WORKING_DIR)/../third_party/lame/include
  
  LOCAL_CFLAGS := -DSTDC_HEADERS -std=c99
  
  LOCAL_ARM_MODE := arm
  
  APP_OPTIM := release
  
  
  
  LOCAL_SRC_FILES := VbrTag.c \
  
                     bitstream.c \
  
                     encoder.c \
  
                     fft.c \
  
                     gain_analysis.c \
  
                     id3tag.c \
  
                     lame.c \
  
                     mpglib_interface.c \
  
                     newmdct.c \
  
                     presets.c \
  
                     psymodel.c \
  
                     quantize.c \
  
                     quantize_pvt.c \
  
                     reservoir.c \
  
                     set_get.c \
  
                     tables.c \
  
                     takehiro.c \
  
                     util.c \
  
                     vbrquantize.c \
  
                     version.c
  
  
  
  
  
  #include $(BUILD_STATIC_LIBRARY)
  
  
  
  include $(BUILD_STATIC_LIBRARY)
  
  
  
  #include $(CLEAR_VARS)
  
  #LOCAL_MODULE  := mp3lame_a
  
  #LOCAL_STATIC_LIBRARIES := lame
  
  
  
  #include $(BUILD_EXECUTABLE) 
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_PATH := $(WORKING_DIR)
  
  LOCAL_MODULE    := ffmpeg
  
  LOCAL_CFLAGS := -DHAVE_AV_CONFIG_H -std=c99 -D__STDC_CONSTANT_MACROS -DSTDC_HEADERS -Wno-deprecated-declarations
  
  LOCAL_SRC_FILES := ffmpeg-jni.c
  
  LOCAL_C_INCLUDES := $(WORKING_DIR)/libavcodec $(WORKING_DIR)/libavcodec/arm $(WORKING_DIR)/libavformat $(WORKING_DIR)/libavutil $(WORKING_DIR)/libavutil/arm
  
  
  
  LOCAL_STATIC_LIBRARIES := lame
  
  
  
  LOCAL_LDLIBS := -llog -lm -lz $(WORKING_DIR)/../third_party/lib/libavformat.a $(WORKING_DIR)/../third_party/lib/libavcodec.a $(WORKING_DIR)/../third_party/lib/libavfilter.a $(WORKING_DIR)/../third_party/lib/libavresample.a $(WORKING_DIR)/../third_party/lib/libswscale.a $(WORKING_DIR)/../third_party/lib/libavutil.a $(WORKING_DIR)/../third_party/lib/libx264.a $(WORKING_DIR)/../third_party/lib/libpostproc.a $(WORKING_DIR)/../third_party/lib/libswresample.a $(WORKING_DIR)/../third_party/lib/libfdk-aac.a
  
  
  
  APP_OPTIM := release
  
  
  
  include $(BUILD_SHARED_LIBRARY)

  FFMPEG.Java

  package com.ephronsystem.mobilizerapp;
  
  
  
  
  
  public class Ffmpeg {
  
  
  
  
  
      static {
  
          System.loadLibrary("ffmpeg");
  
      }
  
  
  
      public static native boolean init(int width, int height, int audio_sample_rate, String rtmpUrl);
  
  
  
      public static native void shutdown();
  
  
  
      // Returns the size of the encoded frame.
  
      public static native int encodeVideoFrame(byte[] yuv_image);
  
  
  
      public static native int encodeAudioFrame(short[] audio_data, int length);
  
  }

• aaccoder : Implement Perceptual Noise Substitution for AAC

  15 avril 2015, par Rostislav Pehlivanov

  aaccoder : Implement Perceptual Noise Substitution for AAC
  This commit implements the perceptual noise substitution AAC extension. This is a proof of concept
  
  implementation, and as such, is not enabled by default. This is the fourth revision of this patch,
  
  made after some problems were noted out. Any changes made since the previous revisions have been indicated.
  In order to extend the encoder to use an additional codebook, the array holding each codebook has been
  
  modified with two additional entries - 13 for the NOISE_BT codebook and 12 which has a placeholder function.
  
  The cost system was modified to skip the 12th entry using an array to map the input and outputs it has. It
  
  also does not accept using the 13th codebook for any band which is not marked as containing noise, thereby
  
  restricting its ability to arbitrarily choose it for bands. The use of arrays allows the system to be easily
  
  extended to allow for intensity stereo encoding, which uses additional codebooks.
  The 12th entry in the codebook function array points to a function which stops the execution of the program
  
  by calling an assert with an always ’false’ argument. It was pointed out in an email discussion with
  
  Claudio Freire that having a ’NULL’ entry can result in unexpected behaviour and could be used as
  
  a security hole. There is no danger of this function being called during encoding due to the codebook maps introduced.
  Another change from version 1 of the patch is the addition of an argument to the encoder, ’-aac_pns’ to
  
  enable and disable the PNS. This currently defaults to disable the PNS, as it is experimental.
  
  The switch will be removed in the future, when the algorithm to select noise bands has been improved.
  
  The current algorithm simply compares the energy to the threshold (multiplied by a constant) to determine
  
  noise, however the FFPsyBand structure contains other useful figures to determine which bands carry noise more accurately.
  Some of the sample files provided triggered an assertion when the parameter to tune the threshold was set to
  
  a value of ’2.2’. Claudio Freire reported the problem’s source could be in the range of the scalefactor
  
  indices for noise and advised to measure the minimal index and clip anything above the maximum allowed
  
  value. This has been implemented and all the files which used to trigger the asserion now encode without error.
  The third revision of the problem also removes unneded variabes and comparisons. All of them were
  
  redundant and were of little use for when the PNS implementation would be extended.
  The fourth revision moved the clipping of the noise scalefactors outside the second loop of the two-loop
  
  algorithm in order to prevent their redundant calculations. Also, freq_mult has been changed to a float
  
  variable due to the fact that rounding errors can prove to be a problem at low frequencies.
  
  Considerations were taken whether the entire expression could be evaluated inside the expression
  
  , but in the end it was decided that it would be for the best if just the type of the variable were
  
  to change. Claudio Freire reported the two problems. There is no change of functionality
  
  (except for low sampling frequencies) so the spectral demonstrations at the end of this commit’s message were not updated.
  Finally, the way energy values are converted to scalefactor indices has changed since the first commit,
  
  as per the suggestion of Claudio Freire. This may still have some drawbacks, but unlike the first commit
  
  it works without having redundant offsets and outputs what the decoder expects to have, in terms of the
  
  ranges of the scalefactor indices.
  Some spectral comparisons : https://trac.ffmpeg.org/attachment/wiki/Encode/AAC/Original.png (original),
  
  https://trac.ffmpeg.org/attachment/wiki/Encode/AAC/PNS_NO.png (encoded without PNS),
  
  https://trac.ffmpeg.org/attachment/wiki/Encode/AAC/PNS1.2.png (encoded with PNS, const = 1.2),
  
  https://trac.ffmpeg.org/attachment/wiki/Encode/AAC/Difference1.png (spectral difference).
  
  The constant is the value which multiplies the threshold when it gets compared to the energy, larger
  
  values means more noise will be substituded by PNS values. Example when const = 2.2 :
  
  https://trac.ffmpeg.org/attachment/wiki/Encode/AAC/PNS_2.2.png
  Reviewed-by : Claudio Freire <klaussfreire@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/aaccoder.c
  • [DH] libavcodec/aacenc.c
  • [DH] libavcodec/aacenc.h

• Superimposing two videos onto a static image ?

  15 décembre 2014, par Archagon

  I have two videos that I’d like to combine into a single video, in which both videos would sit on top of a static background image. (Think something like this.) My requirements are that the software I use is free, that it runs on OSX, and that I don’t have to re-encode my videos an excessive number of times. I’d also like to be able to perform this operation from the command line or via script, since I’ll be doing it a lot. (But this isn’t strictly necessary.)

  I tried fiddling with ffmpeg for a couple of hours, but it just doesn’t seem very well suited for post-processing. I could potentially hack something together via the overlay feature, but so far I haven’t figured out how to do it, aside from pain-stakingly converting the image to a video (which takes 2x as long as the length of my videos !) and then superimposing the two videos onto it in another rendering step.

  Any tips ? Thank you !

  ---

  Update :

  Thanks to LordNeckbeard’s help, I was able to achieve my desired result with a single ffmpeg call ! Unfortunately, encoding is quite slow, taking 6 seconds to encode 1 second of video. I believe this is caused by the background image. Any tips on speeding up encoding ? Here’s the ffmpeg log :

  MacBook-Pro:Video archagon$ ffmpeg -loop 1 -i underlay.png -i test-slide-video-short.flv -i test-speaker-video-short.flv -filter_complex "[1:0]scale=400:-1[a];[2:0]scale=320:-1[b];[0:0][a]overlay=0:0[c];[c][b]overlay=0:0" -shortest -t 5 -an output.mp4
  
  ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Nov 14 2012 16:18:58 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      51. 73.101 / 51. 73.101
  
    libavcodec     54. 59.100 / 54. 59.100
  
    libavformat    54. 29.104 / 54. 29.104
  
    libavdevice    54.  2.101 / 54.  2.101
  
    libavfilter     3. 17.100 /  3. 17.100
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, image2, from 'underlay.png':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgb24, 1024x768, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Input #1, flv, from 'test-slide-video-short.flv':
  
    Metadata:
  
      author          : 
  
      copyright       : 
  
      description     : 
  
      keywords        : 
  
      rating          : 
  
      title           : 
  
      presetname      : Custom
  
      videodevice     : VGA2USB Pro V3U30343
  
      videokeyframe_frequency: 5
  
      canSeekToEnd    : false
  
      createdby       : FMS 3.5
  
      creationdate    : Mon Aug 16 16:35:34 2010
  
      encoder         : Lavf54.29.104
  
    Duration: 00:50:32.75, start: 0.000000, bitrate: 90 kb/s
  
      Stream #1:0: Video: vp6f, yuv420p, 640x480, 153 kb/s, 8 tbr, 1k tbn, 1k tbc
  
  Input #2, flv, from 'test-speaker-video-short.flv':
  
    Metadata:
  
      author          : 
  
      copyright       : 
  
      description     : 
  
      keywords        : 
  
      rating          : 
  
      title           : 
  
      presetname      : Custom
  
      videodevice     : Microsoft DV Camera and VCR
  
      videokeyframe_frequency: 5
  
      audiodevice     : Microsoft DV Camera and VCR
  
      audiochannels   : 1
  
      audioinputvolume: 75
  
      canSeekToEnd    : false
  
      createdby       : FMS 3.5
  
      creationdate    : Mon Aug 16 16:35:34 2010
  
      encoder         : Lavf54.29.104
  
    Duration: 00:50:38.05, start: 0.000000, bitrate: 238 kb/s
  
      Stream #2:0: Video: vp6f, yuv420p, 320x240, 204 kb/s, 25 tbr, 1k tbn, 1k tbc
  
      Stream #2:1: Audio: mp3, 22050 Hz, mono, s16, 32 kb/s
  
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  
  using cpu capabilities: none!
  
  [libx264 @ 0x7fa84c02f200] profile High, level 3.1
  
  [libx264 @ 0x7fa84c02f200] 264 - core 119 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf54.29.104
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1024x768, q=-1--1, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 (png) -> overlay:main
  
    Stream #1:0 (vp6f) -> scale
  
    Stream #2:0 (vp6f) -> scale
  
    overlay -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help

  ---

  Update 2 :

  It works ! One important tweak was to move the underlay.png input to the end of the input list. This increased performance substantially. Here’s my final ffmpeg call. (The maps at the end aren’t required for this particular arrangement, but I sometimes have a few extra audio inputs that I want to map to my output.)

  ffmpeg
  
      -i VideoOne.flv
  
      -i VideoTwo.flv
  
      -loop 1 -i Underlay.png
  
      -filter_complex "[2:0] [0:0] overlay=20:main_h/2-overlay_h/2 [overlay];[overlay] [1:0] overlay=main_w-overlay_w-20:main_h/2-overlay_h/2 [output]"
  
      -map [output]:v
  
      -map 0:a
  
      OutputVideo.m4v