AMediaExtractor_setDataSource() in C++ code not working

[thierr...@technicolor.com]

Hi,

I'm using AMediaExtractor api from C++ code (no java). I have a problem when calling AMediaExtractor_setDataSource(ex, "/sdcard/gandalf2.avi"). It returns error code -10000.
This is the basic code I'm using. Is somebody has any idea of the problem I get ?

Thank's for the replies,

Thierry




        gpu::platform::android::Application::getCurrent().attachToJVM();



        AMediaExtractor *ex = AMediaExtractor_new(); // this works fine, AMediaExtractor_new is ok.
        if(ex != nullptr)
            __android_log_print(ANDROID_LOG_INFO, "com.technicolor.vrfl.thierry", "ici 2 = AMediaExtractor_new ok");
        else
            __android_log_print(ANDROID_LOG_INFO, "com.technicolor.vrfl.thierry", "ici 3 = AMediaExtractor_new nok");       
   
       


        media_status_t err = AMediaExtractor_setDataSource(ex, "/sdcard/gandalf2.avi");  //AMediaExtractor_setDataSource returns an error code -10000
        if (err != AMEDIA_OK )
            __android_log_print(ANDROID_LOG_INFO, "com.technicolor.vrfl.thierry", "AMediaExtractor_setDataSource ici 4 = AMEDIA_NOK error %d",  err); 
        else
            __android_log_print(ANDROID_LOG_INFO, "com.technicolor.vrfl.thierry", "AMediaExtractor_setDataSource ici 5 = AMEDIA_OK");  

      
   
        gpu::platform::android::Application::getCurrent().detachFromJVM();

[Alex Cohn]

/sdcard may be hidden for your application. This alias may be available from adb shell but you cannot trust it. See e.g. https://stackoverflow.com/a/19569136/192373. External storage may temporarily not be mounted, e.g. when it is used for USB file transfer, or the sd-card is pulled out. Finally, your app may not have permissions to read from external storage. 

BR,

Alex

[Dan Albert]

You do have an sdcard in the device, right? For devices with removable storage that don't have an sdcard in place (or perhaps just unmounted) file system operations in /sdcard will fail. Could be one of those errors being propagated up to your application.

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