Date: Fri, 19 Oct 2001 16:12:40 -0700 (PDT) From: bruno schwander <bschwand@dvart.com> To: Pete McKenna <pmckenna@qwest.net> Cc: Daniel O'Connor <doconnor@gsoft.com.au>, multimedia@FreeBSD.ORG Subject: Re: fxtv and real-time mpeg capture (status) Message-ID: <Pine.BSF.4.21.0110191603350.19136-100000@mail.dvart.com> In-Reply-To: <20011019090502.V81785@otto.oss.qwest.net>
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thanks for the hint. I specify more parameters when encoding, maybe some interfere or do not have the expected result. I'll try what you did, and streaming from the fifos, maybe there is an issue there. I noticed something funny with my non-working mpeg4: videolan can play the audio track, not the video... weird. Also, the output is an mpeg system stream, not avi. Maybe that will make the difference... bruno PS: can you keep those files until I get to check this out, maybe I'll ask you for them and parameters. could be useful. thanks. > > > > so, anybody can play mpeg4 streams generated by ffmpeg ? > > Yes the files play ok in mplayer. I didn't stream them though. > This is obviously not the way to do it but I was just experimenting > with getting mpeg4 files made to see if they would play under mplayer. > > I first made an mpeg1 file with the built in scripts from fxtv. > I then did this: > > ffmpeg -ac 2 -f mpeg -i ffmpeg_test3.mps -vcodec msmpeg4 ffmpeg_test3.avi > > The file plays just fine in mplayer. > This is a 320x240 30fps stereo clip. I have all the files raw mpeg1 and > mpeg4 if you have any questions on their settings. > > Pete > > > > > > problem is I do not know if the player has a problem or the encoder or > > most probably the parameters are wrong. But ffmpeg output during encoding > > does not show anything special. > > > > bruno > > > > On Fri, 19 Oct 2001, Daniel O'Connor wrote: > > > > > > > > On 18-Oct-2001 bruno schwander wrote: > > > > Fxtv is actually consuming twice as much cpu time as ffmpeg (probably > > > > because of the conversion to ppm, and because I do some inefficient > > > > things) > > > > > > If you could get fxtv to dump YUV frames you would find it would be much more > > > efficient.. > > > > > > The BT8x8 cards can generate such frames, and mpeg encoding starts off by > > > generating YUV from RGB (and it is a major CPU killer - witness how much CPU > > > the Xv extension saves you when playing a movie - the CPU no longer has to do > > > YUV -> RGB) > > > > > > And, uhh, no, I have no patches :) > > > > > > > I'll post a link when I get there. Probably some time next week. > > > > > > This is good work :) > > > > > > --- > > > Daniel O'Connor software and network engineer > > > for Genesis Software - http://www.gsoft.com.au > > > "The nice thing about standards is that there > > > are so many of them to choose from." > > > -- Andrew Tanenbaum > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-multimedia" in the body of the message > > -- > Peter McKenna Qwest Internet Solutions > pmckenna@qwest.net Main 612-664-4000 > FAX 612-664-4770 > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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