{

QCoreApplication a(argc, argv);

QString file = QString::fromLatin1("test.avi");

int idx = a.arguments().indexOf(QLatin1String("-f"));

if (idx > 0)

file = a.arguments().at(idx + 1);

QString decName = QString::fromLatin1("FFmpeg");

idx = a.arguments().indexOf(QLatin1String("-vc"));

if (idx < 0)

idx = a.arguments().indexOf(QLatin1String("-vd"));

if (idx > 0)

decName = a.arguments().at(idx + 1);

QString opt;

QVariantHash decopt;

idx = decName.indexOf(QLatin1String(":"));

if (idx > 0) {

opt = decName.right(decName.size() - idx -1);

decName = decName.left(idx);

QStringList opts(opt.split(QString::fromLatin1(";")));

QVariantHash subopt;

foreach (QString o, opts) {

idx = o.indexOf(QLatin1String(":"));

subopt[o.left(idx)] = o.right(o.size() - idx - 1);

}

decopt[decName] = subopt;

}

qDebug() << decopt;

VideoDecoder *dec = VideoDecoder::create(decName.toLatin1().constData());

if (!dec) {

fprintf(stderr, "Can not find decoder: %s\n", decName.toUtf8().constData());

return 1;

}

if (!decopt.isEmpty())

dec->setOptions(decopt);

AVDemuxer demux;

demux.setMedia(file);

if (!demux.load()) {

qWarning("Failed to load file: %s", file.toUtf8().constData());

return 1;

}

dec->setCodecContext(demux.videoCodecContext());

dec->open();

int count = 0;

int vstream = demux.videoStream();

QQueue<qint64> t;

qint64 t0 = QDateTime::currentMSecsSinceEpoch();

while (!demux.atEnd()) {

if (!demux.readFrame())

continue;

if (demux.stream() != vstream)

continue;

const Packet pkt = demux.packet();

if (dec->decode(pkt)) {

VideoFrame frame = dec->frame(); // why is faster to call frame() for hwdec? no frame() is very slow for VDA

Q_UNUSED(frame);

count++;

const qint64 now = QDateTime::currentMSecsSinceEpoch();

const qint64 dt = now - t0;

t.enqueue(now);

printf("decode count: %d, elapsed: %lld, fps: %.1f/%.1f\r", count, dt, count*1000.0/dt, t.size()*1000.0/(now - t.first()));fflush(0);

if (t.size() > 10)

t.dequeue();

}

}

return 0;