Date: Fri, 14 Apr 2006 22:10:14 -0700 From: Jacob Meuser <jakemsr@jakemsr.com> To: freebsd-multimedia@freebsd.org Subject: Re: ffmpeg question Message-ID: <20060415051014.GA20238@puff.jakemsr.gom> In-Reply-To: <FAEBE9DA-2556-4F6E-9A50-3D9A22D42805@netmusician.org> References: <FAEBE9DA-2556-4F6E-9A50-3D9A22D42805@netmusician.org>
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On Fri, Apr 14, 2006 at 11:54:18PM -0400, Joe Auty wrote: > Hello, > > Doing a: > > cat /dev/cxm0 > myvideo.mpg > > produces great mpeg2 video... However: > > ffmpeg -i /dev/cxm0 -t 10 test_ffmpeg.mpg > > produces 10 seconds of mpeg1 video that doesn't look as good. > > > I've tried adding -f <format> and -vcodec options with -s 640x480, > but I just can't seem to find something that will reproduce my raw > feed without errors, loss of picture, the size being off, or > reverting back to mpeg1. > > To save me a little further time in just random trial and error, can > anybody hook me up with the combination I need? sorry, but what exactly are you trying to do? what is lacking with the cat command? most likely, if you are running a transcoder (like ffmpeg, mencoder or transcode), it is decoding the input into raw YUV or RGB and then back to MPEG. this is a lossy and time/cpu consuming process. -- <jakemsr@jakemsr.com>
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