<html><head><style>P {margin-top:2px;margin-bottom:2px;}</style></head><body><div style="font-size:10pt; font-family:gulim,Gulim,AppleGothic,sans-serif;"><P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif">Dear Jan,</P>
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<P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif">It works. Thank you for your help.</P>
<P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif">Have a nice day.</P>
<P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif"> </P>
<P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif">Best Regards,</P>
<P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif">hsk</P>
<P style="FONT-SIZE: 10pt; FONT-FAMILY: ,AppleGothic,sans-serif"> </P>
<P style="PADDING-RIGHT: 0px; PADDING-LEFT: 10pt; FONT-SIZE: 10pt; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT-FAMILY: Gulim,AppleGothic,sans-serif"><SPAN>-----Original Message-----</SPAN><BR><B>From:</B> "jan hölscher"<jan.hoelscher@codergrid.de> <BR><B>To:</B> "This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter."<libav-user@ffmpeg.org><BR><B>Cc:</B> <BR><B>Sent:</B> 11-09-19(월) 00:59:58<BR><B>Subject:</B> Re: [Libav-user] Encoding packetization speed<BR><BR>
<P>You an try to set rc_lookahead=0, that should solve the delay.<BR>Regards,<BR>Jan.</P>
<DIV class=gmail_quote>Am 15.09.2011 04:37 schrieb "김희숙" <<A href="mailto:hskim095@naver.com">hskim095@naver.com</A>>:<BR type="attribution">> After decoding on another PC(192.168.1.100), I can see the delay 2 seconds more. There is no exact calculation.<BR>> The decoding module is also ffmpeg library.<BR>><BR>> I found out ffmpeg encoder does not return output data even though vfw capture data exist.<BR>> After ffmpeg encoder is received more than 40 frames, the encoder returns output data.<BR>><BR>> BTW, I added cqp option and then the ffmpeg encoder returns output data promptly.<BR>><BR>> -----Original Message-----<BR>> From: "NEERAJ SHUKLA"&<A href="mailto:lt%3Bneeraj2009shukla@gmail.com">lt;neeraj2009shukla@gmail.com</A>><BR>> To: "This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter."&<A href="mailto:lt%3Blibav-user@ffmpeg.org">lt;libav-user@ffmpeg.org</A>><BR>> Cc:<BR>> Sent: 11-09-10(토) 02:14:35<BR>> Subject: Re: [Libav-user] Encoding packetization speed<BR>> 2011/8/31 김희숙 &<A href="mailto:lt%3Bhskim095@naver.com">lt;hskim095@naver.com</A>><BR>> Hi All,<BR>><BR>> I'm testing FFMPEG performance with libx264 for H.264 encoding.<BR>> I found there may 2 or 3 seconds delay on receiving PC.<BR>><BR>> The command is as follows:<BR>> 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://<A href="http://192.168.1.100:40000/">192.168.1.100:40000</A><BR>><BR>> I also tested cif resolution and I got same result, 2 or 3 seconds delay.<BR>> I captured the rtp packets and I found there is no many packets to be sent on receiving side.<BR>><BR>> In general, how many packets to be sent under 1280x720@30fps?<BR>><BR>> the decoding picture quality was good but there was delay.<BR>><BR>> I wonder there is missing point on above command or something.<BR>><BR>> Please advise something to me.<BR>><BR>> Thanks<BR>> hsk<BR>> _______________________________________________<BR>> Libav-user mailing list<BR>> <A href="mailto:Libav-user@ffmpeg.org">Libav-user@ffmpeg.org</A><BR>> <A href="http://ffmpeg.org/mailman/listinfo/libav-user">http://ffmpeg.org/mailman/listinfo/libav-user</A><BR>> HOW ARE YOU CALCULATING THE DELAY ??<BR>> PLEASE SPECIFY ELABORATELY<BR></DIV>
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