Htykuut

I'm making an app that uses FFmpeg on Android to show the screen.

I have a few questions to ask you.

std::vector <AVHWDeviceType> GetSupportHwDeviceType ()

{

    unsigned int idx {};

    std::vector <AVHWDeviceType> hwDevTypes;



    AVHWDeviceType hwDevType = AVHWDeviceType::AV_HWDEVICE_TYPE_NONE;

    while ((hwDevType = av_hwdevice_iterate_types (hwDevType)) ! = AVHWDeviceType::AV_HWDEVICE_TYPE_NONE)

    {

        __android_log_print (ANDROID_LOG_DEBUG, __func__, "[Index% d]", idx ++);

        __android_log_print (ANDROID_LOG_DEBUG, __func__,

                        "[Support Device Name% s]", av_hwdevice_get_type_name (hwDevType));



        hwDevTypes.push_back (hwDevType);

    }



    return hwDevTypes;

}

I would like to use hardware acceleration with the above function, and as a result I could not find any type.

At https://trac.ffmpeg.org/wiki/HWAccelIntro, it says that Android can use MediaCodec. Why can not I retrieve any type from Android NDK with GetSupportHwDeviceType ()?

The Configure argument used while building FFmpeg for Android.

--disable-asm

--enable-cross-comile

--disable-static

--disable-programs

--disable-doc

--enable-shared

--enable-protocol=file

--enable-pic

--enable-small

--enable-mediacodec

--enable-jni

--enable-decoder=h264_mediacodec

--enable-opengl



/* The argument was not supported by ./configure --list-hwaccel in FFmpeg v4.0.3. */



--enable-hwaccel=h264_mediacodec