On Sun, Nov 12, 2017 at 11:40:57AM +0900, Natsuki Kai wrote: > Hello guys, > > this is my first posting to ffmpeg-devel, and I believe my mail format is > correct. > > I'm using ffmpeg for encoding video in real-time, so low encode delay is > needed. > Once I call "avcodec_send_frame(avctx, frame)", I'd like to get the encoded > data from "avcodec_receive_packet(avctx, avpkt)". > > However I cannot do that in ffmpeg and Intel QSV (qsv), > "avcodec_receive_packet()" returns nothing when I input the first frame to > qsv encoder by calling "avcodec_send_frame()". > Of cource, after second frame inputs, qsv encoder returns valid data. > I'd like to get a valid data from first calling. > > I've tried some cases and as a result, my requirement is satisfied when > avcodec/qsvenc.c will be fixed like below diff info. > Then I have a question. > Why q->async_fifo is set to be q->async_depth "+ 1"? > Anybody knows? > > --- a/avcodec/qsvenc.c > +++ b/avcodec/qsvenc.c > @@ -803,7 +803,7 @@ > > q->param.AsyncDepth = q->async_depth; > > - q->async_fifo = av_fifo_alloc((1 + q->async_depth) * > + q->async_fifo = av_fifo_alloc((q->async_depth) * > (sizeof(AVPacket) + > sizeof(mfxSyncPoint*) + sizeof(mfxBitstream*))); > if (!q->async_fifo) > return AVERROR(ENOMEM);
This looks corrupted by a newline Applying: avcodec/qsvenc Question for Intel QSV low latency error: corrupt patch at line 10 [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Those who are best at talking, realize last or never when they are wrong.
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