[MPlayer-users] pipe /dev/video0 to fifo
peter.white at posteo.net
Sat Jun 11 16:20:27 CEST 2016
Am 11.06.2016 um 15:21 schrieb Peter Irbizon:
> when I run $ mplayer tv:///dev/video0 I get picture ok. And with
> other commands like "mplayer tv:// -tv
> driver=v4l2:norm=PAL:device=/dev/video0 -hardframedrop" too.
All right, so mplayer can play it. Check.
>>> $ mplayer tv:///dev/video0 -dumpstream -dumpfile test_output.raw
> This gives me just 0 byte file and closes mplayer immediatelly.
So there is the culprit. Apparently, mplayer does not like to dump a
stream from v4l2-devices. Searching the man page for dumpstream
... Same as for -dumpstream, this will likely not produce
usable results for anything else than MPEG streams. ..."
Maybe there is nothing that can be done, for now. It might be a bug in
mplayer, or a "feature" judging by this statement. If you think it is
a bug that needs fixing, I suggest filing a report:
But, maybe there are other options outside of using mplayer. Certainly,
these would be off-topic for this list, but at least there are some.
Someone in the Pi-community seems to have faced the same problem:
The last reply suggests cvlc could be a solution, only the script
Also, ffmpeg comes to mind:
But that is as far off-topic as I am willing to go. :)
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