ffmpeg using MediaCodec, avcodec_open2 says error code:-1 (0xffffffff) text: “Operation not permitted”

delamor

Qt version: 5.7.1
ffmpeg version: n3.3
Android version: 5.1.1 ( but I've tried on some different devices )

I'm trying to use the Android API MediaCoded that have been supported by ffmpeg but while I try to open the codec I got "Operation not permitted" all times, I've tried some changes and I've tried to find examples without not luck.

This is what I'm doing

av_jni_set_java_vm(QAndroidJniEnvironment::javaVM(), NULL);

av_register_all();
avcodec_register_all();

AVCodec *_codec(nullptr);
AVCodecContext *_codecContext(nullptr);

if (_codec == nullptr)
    _codec = avcodec_find_decoder_by_name("h264_mediacodec");

if (_codecContext == nullptr)
    _codecContext = avcodec_alloc_context3(_codec);

int ret = 0;
if( (ret = avcodec_open2(_codecContext, _codec, NULL)) < 0 ) {

    char str[AV_ERROR_MAX_STRING_SIZE];
    memset(str, 0, sizeof(str));
    av_strerror(ret, str, sizeof(str));

    qDebug("avcodec_open2 \"%s\" error[code:%d text:\"%s\"]",_codec->long_name, ret, str);
}

And I'm getting this output

avcodec_open2 "H.264 Android MediaCodec decoder" error[code:-1 text:"Operation not permitted"]

What I'm doing wrong?

SGaist

Hi,

I haven't used ffmpeg on that platform but since you are looking after h264 and it not beeing a free format, I'd first start by printing everything that ffmpeg provides to check if the support is there.

delamor

I've already checked that, was also my first point

    av_jni_set_java_vm(QAndroidJniEnvironment::javaVM(), NULL);

    av_register_all();
    avcodec_register_all();

    AVCodec *current_codec = av_codec_next(current_codec);
    while (current_codec != NULL)
    {
        QString name(current_codec->name);
        if(name.contains("mediacodec"))
            qDebug("codec:%s",current_codec->name);
        current_codec = av_codec_next(current_codec);
    }

With output

codec:h264_mediacodec
codec:hevc_mediacodec
codec:mpeg4_mediacodec
codec:vp8_mediacodec
codec:vp9_mediacodec

So the codecs are there.

P.S.:
Thanks for your suggestion :)

rohit_n

Hey,
Just wondering if you found any solution to this?