Javacv: normalize_path - invalid input: "lib/", the input path should be absolute

[YLPeng]

val fffr = FFmpegFrameRecorder(Environment.getExternalStorageDirectory().absolutePath + File.separator + "test.mp4",256,256)
        try {
            fffr.videoCodec = avcodec.AV_CODEC_ID_MPEG4
            fffr.format = "mp4"
            fffr.frameRate = 30.0
            fffr.pixelFormat = avutil.AV_PIX_FMT_YUV420P
            fffr.videoBitrate = 1200
            fffr.start()

            for (i in 0..4) {
                activity_record_layout.isDrawingCacheEnabled = true
                val b = Bitmap.createBitmap(activity_record_layout.drawingCache)
                //val frame =viewToFrame(activity_record_layout)
                val frame = AndroidFrameConverter().convert(b)
                recorder.record(frame)
            }

            fffr.stop()
        }
        catch (e: Exception){
            e.printStackTrace()
        }

I have above simple function to record view using FFmpegRecorder. However I have following issue when I'm running the code:

E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
W/linker: Warning: unable to normalize "lib/"
W/System.err: org.bytedeco.javacv.FrameRecorder$Exception: avio_open2 error() error -13: Could not open 'null'

I have searched issues with error -13 but didn't find any useful information. Please help thanks!

here's my grade dependencies for java cv:

    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation group: 'org.bytedeco', name: 'javacv', version: '1.4.4'
    implementation 'org.bytedeco.javacpp-presets:opencv:4.0.1-1.4.4:android-arm'
    implementation 'org.bytedeco.javacpp-presets:opencv:4.0.1-1.4.4:android-x86'
    implementation 'org.bytedeco.javacpp-presets:ffmpeg:4.1-1.4.4:android-arm'
    implementation 'org.bytedeco.javacpp-presets:ffmpeg:4.1-1.4.4:android-x86'

[saudet]

Since this isn't a problem, let's mark this as "enhancement". Please consider making a contribution :)

[saudet]

If you're wondering why Environment.getExternalStorageDirectory() returns null, that's not an issue with JavaCV, it's probably a problem with the permissions of your application.

[YLPeng]

Thank you @saudet. You are right, the issue was caused by the permissions issue. If anyone has the same issue, please double check you have the code to request correct permissions. I believe starting from Android 6.0 (API level 23), you need to have both manifest and request code in order to get permission granted.

https://developer.android.com/training/permissions/requesting

[Maja755]

Which Android permissions exactly do I need to set for this error "normalize_path - invalid input: "lib/", the input path should be absolute" not to be present?

[saudet]

@Maja755 That's probably just a warning that we can ignore.

[saudet]

The only thing that I can see that could do that is the rpath given in these properties:
https://github.com/bytedeco/javacpp/tree/master/src/main/resources/org/bytedeco/javacpp/properties
I believe it used to be required a long long time ago, but I think we can remove it now...
@Maja755 Please give it a try! Thanks

[Maja755]

@saudet Thank you for your previous answer about ignoring the warning. Though I don't understand your last reply...
But in this context, when ignoring the above mentioned warning, I get the following errors, which I am not sure have anything to do with the warning:

2019-10-03 18:24:14.658 1400-1668/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2019-10-03 18:24:14.997 1400-1434/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2019-10-03 18:24:15.609 1603-1620/? E/BluetoothAdapter: Bluetooth binder is null
2019-10-03 18:24:15.623 1603-1620/? E/KernelUidCpuFreqTimeReader: Failed to read /proc/uid_time_in_state: java.io.FileNotFoundException: /proc/uid_time_in_state (No such file or directory)
2019-10-03 18:24:15.623 1603-1620/? E/KernelCpuSpeedReader: Failed to read cpu-freq: /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state (No such file or directory)
2019-10-03 18:24:15.702 1603-1620/? E/BatteryExternalStatsWorker: modem info is invalid: ModemActivityInfo{ mTimestamp=0 mSleepTimeMs=0 mIdleTimeMs=0 mTxTimeMs[]=[0, 0, 0, 0, 0] mRxTimeMs=0 mEnergyUsed=0}

What would you say about these errors?

[saudet]

@Maja755 Those don't look related, no.

[qq12cvhj]

So what is the exactly permission?My device is on Android O or later.I just write this:
String str = Loader.load(ffmpeg.class);
Now the str is null.
and then I got this :
E/linker: normalize_path - invalid input: "lib/", the input path should be absolute W/linker: Warning: unable to normalize "lib/" (ignoring)
I've already require the WRITE & READ EXTERNAL STORAGE permissions.But this problem occurs.

[saudet]

@qq12cvhj That's just a warning, not an error. The error is some other message in the log.

[nlgtuankiet]

I tried 'org.bytedeco:ffmpeg-platform:4.2.2-1.5.3' few day ago
For some reason Loader.load(ffmpeg.class); return null (same with @qq12cvhj )
avcodec other binding in org.bytedeco.ffmpeg.global.** still work
and the apk looking good though

I'm using this library on Android
Could you please check @saudet
Thanks!

[saudet]

@nlgtuankiet That's been fixed in 1.5.4-SNAPSHOT, see issue #1410.
Please give it a try with the snapshots: http://bytedeco.org/builds/

[nlgtuankiet]

thank @saudet
I tried 1.5.4-SNAPSHOT
Good new is Loader.load(ffmpeg::class.java) working well, but I got permission denied when trying to execute the command ffmpeg (both alone with no params and with params) using the ProcessBuilder (from the doc)
Any idea?

2020-06-13 15:56:08.748 1568-3248/com.nlgtuankiet.ffmpeg1 E/AndroidRuntime: FATAL EXCEPTION: pool-1-thread-1
    Process: com.nlgtuankiet.ffmpeg1, PID: 1568
    java.lang.Error: java.io.IOException: Cannot run program "/data/data/com.nlgtuankiet.ffmpeg1/cache/.javacpp-root/cache/base.apk/lib/arm64-v8a/ffmpeg": error=13, Permission denied
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1173)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:929)
     Caused by: java.io.IOException: Cannot run program "/data/data/com.nlgtuankiet.ffmpeg1/cache/.javacpp-root/cache/base.apk/lib/arm64-v8a/ffmpeg": error=13, Permission denied
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050)
        at com.nlgtuankiet.ffmpeg1.MainActivity.exeCommand(MainActivity.kt:65)
        at com.nlgtuankiet.ffmpeg1.MainActivity.access$exeCommand(MainActivity.kt:24)
        at com.nlgtuankiet.ffmpeg1.MainActivity$execute$1.run(MainActivity.kt:48)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:929) 
     Caused by: java.io.IOException: error=13, Permission denied
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)
        at java.lang.ProcessImpl.start(ProcessImpl.java:141)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
        at com.nlgtuankiet.ffmpeg1.MainActivity.exeCommand(MainActivity.kt:65) 
        at com.nlgtuankiet.ffmpeg1.MainActivity.access$exeCommand(MainActivity.kt:24) 
        at com.nlgtuankiet.ffmpeg1.MainActivity$execute$1.run(MainActivity.kt:48) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:929) 

[saudet]

You've probably forgotten to give execute permission to your app.

[nlgtuankiet]

@saudet thank man, it work!

For those who are using this library on android, try this:

val ffmpeg = Loader.load(ffmpeg::class.java)
require(File(ffmpeg).setExecutable(true))

repositories {
    maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
}
implementation 'org.bytedeco:ffmpeg-platform:4.2.3-1.5.4-SNAPSHOT'

[saudet]

File.setExecutable(true) already gets called before returning it, so something else is causing problems here: https://github.com/bytedeco/javacpp/blob/master/src/main/java/org/bytedeco/javacpp/Loader.java#L1262

BTW, it appears that Android API 29+ doesn't support executing files like that anymore, so we might have to use API 28 or lower until they figure out another way to let us do that again.

[nlgtuankiet]

yup, my compileSdkVersion is 29 but I set targetSdkVersion to 28. As @saudet mention targetSdkVersion 29 will not work and you will get an exception:

     Caused by: java.io.IOException: error=13, Permission denied
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)
        at java.lang.ProcessImpl.start(ProcessImpl.java:141)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
        at org.zeroturnaround.exec.ProcessExecutor.invokeStart(ProcessExecutor.java:997) 
        at org.zeroturnaround.exec.ProcessExecutor.startInternal(ProcessExecutor.java:970) 
        at org.zeroturnaround.exec.ProcessExecutor.execute(ProcessExecutor.java:906) 

I have since an open that put ffmpeg executable file in the assets folder, at run time they copy it into the app folder ann execute the file from there. I haven't tried it yet but targetSdkVersion 28 seems just fine for me now

Edit: nope you still got permission denied

[saudet]

@nlgtuankiet Try an even older version of the SDK. It works fine for me when targeting Android 7.0, see issue #1410.