Date: Wed, 3 Sep 2003 00:25:27 +0900 (JST) From: sugiura@kt.rim.or.jp (Sugiura Shiro) To: steve@sohara.org, freebsd-multimedia@freebsd.org Subject: Re: How to make high quality MPEG4 video Message-ID: <200309021525.AAA26452@mail4.rim.or.jp> In-Reply-To: Your message of "Mon, 1 Sep 2003 20:13:41 %2B0200". <20030901201341.1e6ff86d.steve@sohara.org>
next in thread | previous in thread | raw e-mail | index | archive | help
In article <20030901201341.1e6ff86d.steve@sohara.org> steve@sohara.org writes: >> With that 2.8GHZ P4 you should be able to go direct. I can quite >> easily record PAL 720x576@25fps in mpeg4 or mpeg1 on my AMD XP2000 in >> realtime with ffmpeg alone running like this: >> >> ffmpeg -s 768x576 -tvstd pal -vcodec mpeg4 -b 2000 -acodec mp3 -ac 2 \ >> -ab 128 -f avi -t $DURATION -y $NAME.avi >> >> It uses about 60% CPU on average, adding -hq pushes it to >> a bit over 70%. Thank you. I tried to direct encode a sportscast like following: % ffmpeg -s 640x480 -tvstd ntsc -vcodec mpeg4 -b 2000 -acodec mp3 -ac 2 \ -ab 128 -f avi TV.avi It uses about 30% CPU on average. And then, I play TV.avi using mplayer and xine. But output avi files seems that some frame was droped during capture and encode. >> SS> Step2-2: mpeg4 encode by ffmpeg(strange out put) >> SS> % ffmpeg -i raw.avi -vcodec mpeg4 -r 29.97 -me full -re -b 2000 >> SS> -acodec \ >> SS> copy -deinterlace tv.avi >> >> Strange how ? Audio stream is OK, but Video stream playbacks 2-3X speed, like Charles Chaplin movies. I tried to direct encode(mpeg1/mpeg4) and rawvideo recode , but in any case , my mpeg files seems that some frames was droped. I think, I mistook something, but I don't know what it is. First step, I want to know how to setup to recode/encode full frames(29.97fps) movie. thank you. -- Sugiura Shiro E-mail : sugiura@kt.rim.or.jp
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200309021525.AAA26452>