[Libav-user] Encoding packetization speed

[조경식]

I think it need buffering for network stream.


2011년 8월 31일 오전 11:12, 김희숙 <hskim095 at naver.com>님의 말:

> Hi All,
>
>
>
> I'm testing FFMPEG performance with libx264 for H.264 encoding.
>
> I found there may 2 or 3 seconds delay on receiving PC.
>
>
>
> The command is as follows:
>
> ffmpeg -r 30 -f vfwcap -s 1280x720  -i 0 -vcodec libx264 -b 2000k -minrate
> 1000k -coder 0 -flags +loop+cgop -cmp +chroma -partitions
> -parti8x8+parti4x4+partp8x8-partp4x4-partb8x8 -me_method dia -subq 3
> -me_range  24 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71
> -b_strategy 1 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -directpred 1 -flags2
> +fastpskip -refs 6 -subq 5 -f rtp rtp://192.168.1.100:40000
>
>
>
> I also tested cif resolution and I got same result, 2 or 3 seconds delay.
>
> I captured the rtp packets and I found there is no many packets to be sent
> on receiving side.
>
>
>
> In general, how many packets to be sent under 1280x720 at 30fps?
>
>
>
> the decoding picture quality was good but there was delay.
>
>
>
> I wonder there is missing point on above command or something.
>
>
>
> Please advise something to me.
>
>
>
> Thanks
>
> hsk
>
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