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use node graph time to get frame

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This commit is contained in:
itsmattkc
2019-08-06 08:41:27 +10:00
parent 360328ccbb
commit 73a32ad9cd
2 changed files with 16 additions and 14 deletions
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app/decoder/ffmpeg/ffmpegdecoder.cpp
+9 -3
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@@ -167,8 +167,12 @@ FramePtr FFmpegDecoder::Retrieve(const rational &timecode, const rational &lengt
return nullptr;
}
//avcodec_flush_buffers(codec_ctx_);
//av_seek_frame(fmt_ctx_, avstream_->index, 0, AVSEEK_FLAG_BACKWARD);
// Convert timecode to AVStream timebase
int64_t target_ts = qFloor(timecode.toDouble() * rational(avstream_->time_base).flipped().toDouble());
// Seek to it
avcodec_flush_buffers(codec_ctx_);
av_seek_frame(fmt_ctx_, avstream_->index, target_ts, AVSEEK_FLAG_BACKWARD);
// Allocate and init a packet for reading encoded data
AVPacket pkt;
@@ -186,6 +190,8 @@ FramePtr FFmpegDecoder::Retrieve(const rational &timecode, const rational &lengt
// FFmpeg frame retrieve loop
while ((ret = avcodec_receive_frame(codec_ctx_, dec_frame)) == AVERROR(EAGAIN) && !eof) {
av_frame_unref(dec_frame);
// Find next packet in the correct stream index
do {
// Free buffer in packet if there is one
@@ -219,7 +225,7 @@ FramePtr FFmpegDecoder::Retrieve(const rational &timecode, const rational &lengt
}
}
// qDebug() << dec_frame->pts << ",";
//qDebug() << dec_frame->pts << ",";
// Handle any errors received during the frame retrieve process
if (ret < 0) {