Hi
My decoder receives slice based frame, and it cannot decode them (the
result is a greased picture). How should I decode them and which are
differences from decoding a usual frame? My code of dedoding is canonical:
if (size >= sizeof(kh264Prefix) && memcmp(data, kh264Prefix,
sizeof(kh264Prefix)) != 0)
{
if (size > prefix_buffer_.size() - sizeof(kh264Prefix))
{
logger_->Error("Too large data packet for decoding");
return false;
}
memcpy(prefix_buffer_.data() + sizeof(kh264Prefix), data, size);
data = prefix_buffer_.data();
size += sizeof(kh264Prefix);
}
AVPacket avpkt;
av_init_packet(&avpkt);
avpkt.pts = 0;
avpkt.dts = 0;
avpkt.data = data;
avpkt.size = size;
int gotFrame = false;
while (avpkt.size > 0)
{
// We must use positive result to move through the data buffer
auto len = avcodec_decode_video2(av_context_, av_frame_, &gotFrame,
&avpkt);
if (len < 0)
{
// In case of an error/warning FFmpeg will call
// decoder::LogCallback(...) to inform about the issue
break;
}
avpkt.data += len;
avpkt.size -= len;
}
av_free_packet(&avpkt);
I tried the AV_CODEC_CAP_SLICE_THREADS flag, not sure is it for decoding
or not.
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