Javacv: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "vp8_short_fdct4x4_sse2"

[anonym24]

java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "vp8_short_fdct4x4_sse2" referenced by "/data/data/com.example.app/app_lib/libavcodec.so"...

I'm trying to test it on 23, 27 API in Android Emulator x86

is it problem with x86 libs or Emulator?

I just don't have a x86 Device

[saudet]

Duplicate of #945. Please use 1.4.2-SNAPSHOT: http://bytedeco.org/builds/

[anonym24]

java presets 1.4.2 also available or only java cv?

is there link for 1.4.2 like for 1.4.1?
http://search.maven.org/remotecontent?filepath=org/bytedeco/javacv-platform/1.4.1/javacv-platform-1.4.1-bin.zip

https://github.com/bytedeco/javacv/issues/945#issuecomment-382254737 - he uses ffmpeg 1.4.1:

[saudet]

Please use 1.4.2-SNAPSHOT: http://bytedeco.org/builds/

[saudet]

You can download the JAR files manually, but no big archive, no.

[anonym24]

@saudet yes I just forgot about bytedeco/javacpp-presets/ffmpeg/ oss.sonatype.org/content/repositories/snapshots/org/bytedeco/javacpp-presets/ffmpeg/

I was trying to find ffmpeg libraries at /bytedeco/javacpp-presets/1.4.2-SNAPSHOT/ (when it should be bytedeco/javacpp-presets/ffmpeg/), my fault

[anonym24]

I'm going to try

    implementation files('libs/javacv-1.4.2-20180501.030242-10.jar')
    implementation files('libs/javacv-platform-1.4.2-20180501.030925-9.jar')
    implementation files('libs/javacpp-1.4.2-20180430.111859-15.jar')
    implementation files('libs/ffmpeg-platform-4.0-1.4.2-20180504.074213-61.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.074158-61.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.034926-56-android-arm.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.041836-57-android-arm64.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.050321-59-android-x86.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.054338-60-android-x86_64.jar')

hope it will work, there are so many files with different version/date, I was trying to download most recent ones (at page end)

[anonym24]

new issues with those libraries when trying to start recording mFFmpegFrameRecorder.start():

05-04 11:30:59.898 15273-15273/ W/System.err: org.bytedeco.javacv.FrameRecorder$Exception: avcodec_find_encoder() error: Video codec not found.
05-04 11:30:59.898 15273-15273/ W/System.err:     at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:447)

[anonym24]

is it a new bug? or did I do something wrong?

[saudet]

You probably have old files in your project somewhere that we not recompiled...

[anonym24]

I only compiled those files:

    implementation files('libs/javacv-1.4.2-20180501.030242-10.jar')
    implementation files('libs/javacv-platform-1.4.2-20180501.030925-9.jar')
    implementation files('libs/javacpp-1.4.2-20180430.111859-15.jar')
    implementation files('libs/ffmpeg-platform-4.0-1.4.2-20180504.074213-61.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.074158-61.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.034926-56-android-arm.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.041836-57-android-arm64.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.050321-59-android-x86.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.054338-60-android-x86_64.jar')

can you please check Recorder with exactly the same files?

[saudet]

Those are already compiled. What you need to recompile is the source code
of your application and of any other library that depends on JavaCV.

[anonym24]

I meant I added them to my build gradle file (replace old java entries with those), made project in Android Studio and it how it worked
I'll try again later of course, but I think I will get the same error

[anonym24]

mb with gradle maven repository in android project (no jars in libs) it will work better:

buildscript {
    repositories {
        google()
        jcenter()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
    }
   ...

I'm trying:

ext {
    versions = [
            'ffmpeg': '4.0-1.4.2-SNAPSHOT'
    ]
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    testImplementation 'junit:junit:4.12'
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation(group: 'org.bytedeco', name: 'javacv-platform', version: '1.4.2-SNAPSHOT') {
        exclude group: 'org.bytedeco.javacpp-presets'
    }
    implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: versions.ffmpeg
    implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: versions.ffmpeg, classifier: 'android-arm'

but get error for preset:

Failed to resolve: ffmpeg-android-arm

or .so lib files I download manually and try later (mb it will work ok)

    // implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.034926-56-android-arm.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.041836-57-android-arm64.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.050321-59-android-x86.jar')
    implementation files('libs/ffmpeg-4.0-1.4.2-20180504.054338-60-android-x86_64.jar')

[anonym24]

yes it worked :) at least on my arm64 device, I'll test on x84 emulator later

[anonym24]

actually I found what really was the issue

in previous versions (JavaCV FFmpeg 3.*) I used: mFrameRecorder.setVideoCodec(28); // 28 == avcodec.AV_CODEC_ID_H264 and it was working ok

but from FFMpeg 4.0 (I guess) it's not 28 anymore but 27, AV_CODEC_ID_H264 = 27
so it's better to use mFrameRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);

[saudet]

Yes, it's never a good idea to use numbers there :)

[anonym24]

checked again it also worked for 8.1 x86 Android Emulator using 1.4.2-SNAPSHOT :)