Em Wed, 4 Sep 2019 11:13:36 -0700 Scott Doty <scott@xxxxxxxxx> escreveu: > On 9/3/19 1:34 AM, Hans Verkuil wrote: > > > > Never mind, hdpvr uses read(), not streaming I/O. Of course this > > doesn't work... > > > > Just plain 'cat /dev/videoX >x.mpg' will do. > > > > > > Okay, tried that, it produces data that vlc can then play back. > > So I think I'm running into a problem with vlc instead of hdpvr. It's > just weird that mplayer, vlc, and ffplay would all three be unable to > use it. You can use any of them, provided that it is opened as if it were a normal file, using the read() interface. For example, this should work: cat /dev/videoX | mplayer -cache 8000 - The thing is that most apps assume that a V4L2 device supports mmap(). This is true for almost all devices, being hdpvr - and pvrusb - two exceptions. Thanks, Mauro
