On Oct 16 19:20:32, Jacob Meuser wrote:
> On Sat, Oct 16, 2010 at 05:46:24PM +0200, Jan Stary wrote:
> > (I have changed the subject,
> > because the subject has changed.)
> >
> > On Oct 14 01:59:39, Jacob Meuser wrote:
> > > On Thu, Oct 14, 2010 at 12:05:09AM +0000, Jacob Meuser wrote:
> > > > On Thu, Oct 14, 2010 at 12:59:37AM +0200, Jan Stary wrote:
> > > > > On Oct 13 22:07:27, Jacob Meuser wrote:
> > > > > > On Wed, Oct 13, 2010 at 11:51:47PM +0200, Jan Stary wrote:
> > > > > > > This is a fresh upgrade of current/amd64 on a Macbook3,1.
> > > > > > > Basically, everything works except the wifi and uvideo.
> > > > > >
> > > > > > > I installed the uvideo firmware as documented in uvideo(4).
> > > > > > > I can capture an image with 'fswebcam image.jpg';
> > > > > > > I have problems capturing a video stream with
> > > > > > > ffmpeg -y -f video4linux2 -s vga -r 25 -i /dev/video0 /tmp/out.mpg
> > > > > > > (the fps eventually drops to 0 and results in a tiny file
> > > > > > > containing just a few frames) but I haven't really tried
> > > > > > > tweaking the format options.
> > > > > >
> > > > > > ffmpeg doesn't work with video(4). frankly, I don't understand why
> > > > > > video(4) support is enabled in ffmpeg, giving the the impression
> > > > > > it's
> > > > > > supposed to work, when it clearly doesn't.
> > > > >
> > > > > On another machine (HP EliteBook 8530w running a recent -current)
> > > > > I can capture video(4) just fine - using certain resolutions and frame
> > > > > rates, that is.
> > > >
> > > > with ffmpeg? can you share your command, I've never gotten it to work.
> >
> > This _sometimes_ works:
> > ffmpeg -y -f video4linux2 -r 25 -s vga -i /dev/video out.mpg
> > Other times, the fps gradually drops to zero.
> >
> > With the current ffmpeg (just built form svn),
> > it consistently results in
> >
> > ffmpeg -y -f video4linux2 -r 25 -s vga -i /dev/video0 /tmp/out.m>
> > FFmpeg version SVN-r25502, Copyright (c) 2000-2010 the FFmpeg developers
> > built on Oct 16 2010 14:05:50 with gcc 4.2.1 20070719
> > configuration:
> > libavutil 50.32. 3 / 50.32. 3
> > libavcore 0. 9. 1 / 0. 9. 1
> > libavcodec 52.92. 0 / 52.92. 0
> > libavformat 52.83. 0 / 52.83. 0
> > libavdevice 52. 2. 2 / 52. 2. 2
> > libavfilter 1.52. 0 / 1.52. 0
> > libswscale 0.12. 0 / 0.12. 0
> > [video4linux2 @ 0x83f3d080] ioctl set time per frame(1/25) failed
> > /dev/video0: Input/output error
> >
> > It fails this way with any other framerate, too.
> > So you are right: it doesn't work.
>
> I'm pretty sure this is because video/uvideo doesn't allow setting the
> frame rate. also, many webcams don't deliver a consistent frame rate;
> some of them will deliver a higher frame rate if they receive more light.
>
> > > fwiw, this is what I use, because using ffmpeg to capture directly from
> > > video(4) has never worked for me:
> > >
> > > $ video -f /dev/video1 -e yuy2 -s 640x480 -r 20 -o - | ffmpeg -y \
> > > -f rawvideo -pix_fmt yuyv422 -s 640x480 -r 20 -i - \
> > > -itsoffset 0.5 -f sndio -ar 16000 -ac 1 -i sun:1 out.avi
> >
> > This is much more reliable;
> > without audio, I can capture just fine with
> >
> > $ video -f /dev/video -e yuy2 -s 640x480 -r 20 -o - \
> > | ffmpeg -y -f rawvideo -pix_fmt yuyv422 -s 640x480 -r 20 -i - out.avi
> >
> > However, the audio part does not work for me.
> > The ffmpeg-20100512p4 package says
> >
> > $ video -f /dev/video -e yuy2 -s 640x480 -r 20 -o - \
> > | ffmpeg -y -f rawvideo -pix_fmt yuyv422 -s 640x480 -r 20 -i - \
> > -f sndio -ar 16000 -ac 1 -i sun:1 out.avi
> > FFmpeg version SVN-r23102, Copyright (c) 2000-2010 the FFmpeg developers
> > built on Oct 11 2010 18:27:01 with gcc 4.2.1 20070719
> > configuration: --enable-shared --cc=cc --disable-altivec
> > --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-armvfp
> > --disable-debug --disable-indev=jack --disable-indev=oss --disable-iwmmxt
> > --disable-neon --disable-optimizations --disable-outdev=oss --enable-gpl
> > --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame
> > --enable-libschroedinger --enable-libspeex --enable-libtheora
> > --enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc
> > --enable-pthreads --enable-runtime-cpudetect --enable-x11grab
> > --extra-cflags=-I/usr/local/include -I/usr/X11R6/include
> > --extra-libs=-L/usr/local/lib -L/usr/X11R6/lib --mandir=/usr/local/man
> > libavutil 50.15. 2 / 50.15. 2
> > libavcodec 52.67. 0 / 52.67. 0
> > libavformat 52.62. 0 / 52.62. 0
> > libavdevice 52. 2. 0 / 52. 2. 0
> > libavfilter 1.20. 0 / 1.20. 0
> > libswscale 0.10. 0 / 0.10. 0
> > libpostproc 51. 2. 0 / 51. 2. 0
> > [rawvideo @ 0x80239080]Estimating duration from bitrate, this may be
> > inaccurate
> > Input #0, rawvideo, from 'pipe:':
> > Duration: N/A, start: 0.000000, bitrate: N/A
> > Stream #0.0: Video: rawvideo, yuyv422, 640x480, 20 tbr, 20 tbn, 20 tbc
> > [sndio @ 0x83bc9080]Could not open sndio device
> > sun:1: Input/output error
>
> -f sndio -ar 16000 -ac 1 -i sun:1 out.avi
>
> that means to record 16kHz mono from /dev/audio1. maybe that just isn't
> supported on your hardware?
Aaah, yes, sorry; :1 should be :0 on my hardware.
> > I get the same result with -f sndio -i /dev/audio.
>
> does simply 'ffmpeg -f sndio -i /dev/audio out.wav' work?
If I kill aucat, yes.
> > I get the same result with or without aucat running.
>
> yeah, ffmpeg requires to specify the "input file", even if the specified
> format's demuxer can figure out on it's own what the "input file" is,
> which means '-i /dev/audio' will not work when aucat is running. when
> aucat is running, you can use '-i aucat:0' or '-i default', assuming
> you are not renaming the aucat streams with aucat's -s option.
With '-i aucat:0' and aucat running, it works fine.
> > The svn install of ffmpeg doesn't even recognize sndio as a format
> > (Unknown input format: 'sndio'). It does recognize -f oss,
> > and I can capture both video and audio with
> >
> > $ video -f /dev/video -e yuy2 -s 640x480 -r 20 -o - \
> > | ffmpeg -y -f rawvideo -pix_fmt yuyv422 -s 640x480 -r 20 -i - \
> > -f sndio -ar 48000 -ac 2 -i /dev/audio out.avi
>
> afaik Brad submitted the sndio backend but the ffmpeg devs consider
> OpenBSD insignificant ... they seem to think that because they don't
> get many complaints about ffmpeg not working on OpenBSD that no one
> uses ffmpeg on OpenBSD, heh.
(Maybe I should subscribe to the ffmpeg list again to bitch some more.)
Thanks again
Jan
