void MovieDecoder::decodeVideoFrame()
{
bool frameFinished = false;
while (!frameFinished && getVideoPacket()) {
frameFinished = decodeVideoPacket();
}
if (!frameFinished) {
qDebug() << "decodeVideoFrame() failed: frame not finished";
return;
}
}
void MovieDecoder::decodeVideoFrame()
{
bool frameFinished = false;
while(!frameFinished && getVideoPacket())
{
frameFinished = decodeVideoPacket();
}
if (!frameFinished)
{
throw std::logic_error("decodeVideoFrame() failed: frame not finished");
}
}
void MovieDecoder::seek(int timeInSeconds)
{
if (!allowSeek_)
{
return;
}
int64_t timestamp = AV_TIME_BASE * static_cast<int64_t>(timeInSeconds);
if (timestamp < 0)
{
timestamp = 0;
}
int ret = av_seek_frame(pFormatContext_, -1, timestamp, 0);
if (ret >= 0)
{
avcodec_flush_buffers(pFormatContext_->streams[videoStream_]->codec);
}
else
{
throw std::logic_error("Seeking in video failed");
}
int keyFrameAttempts = 0;
bool gotFrame = 0;
do
{
int count = 0;
gotFrame = 0;
while (!gotFrame && count < 20)
{
getVideoPacket();
try
{
gotFrame = decodeVideoPacket();
}
catch(std::logic_error&) {}
++count;
}
++keyFrameAttempts;
} while ((!gotFrame || !pFrame_->key_frame) && keyFrameAttempts < 200);
if (gotFrame == 0)
{
throw std::logic_error("Seeking in video failed");
}
}
int VideoDecoder::decodeVideoFrame() {
int gotpkt = -1, decpkt = -1;
while (((gotpkt = getVideoPacket()) == 0)
&& ((decpkt = decodeVideoPacket()) == 0)) {
//empty
}
if (gotpkt < 0 || decpkt < 0) {
return -1;
}
return 0;
}
void MovieDecoder::seek(int timeInSeconds)
{
if (!m_AllowSeek) {
return;
}
qint64 timestamp = AV_TIME_BASE * static_cast<qint64>(timeInSeconds);
if (timestamp < 0) {
timestamp = 0;
}
int ret = av_seek_frame(m_pFormatContext, -1, timestamp, 0);
if (ret >= 0) {
avcodec_flush_buffers(m_pFormatContext->streams[m_VideoStream]->codec);
} else {
qDebug() << "Seeking in video failed";
return;
}
int keyFrameAttempts = 0;
bool gotFrame = 0;
do {
int count = 0;
gotFrame = 0;
while (!gotFrame && count < 20) {
getVideoPacket();
gotFrame = decodeVideoPacket();
++count;
}
++keyFrameAttempts;
} while ((!gotFrame || !m_pFrame->key_frame) && keyFrameAttempts < 200);
if (gotFrame == 0) {
qDebug() << "Seeking in video failed";
}
}
