[vlc-devel] [PATCH 2/2] add V4L2 video_output module

Francois Cartegnie fcvlcdev at free.fr
Sat Jan 14 14:43:16 CET 2012

Le 14/01/2012 09:42, Rémi Denis-Courmont a écrit :
> It is dubious that you would need to copy pictures.

writev() doesn't help here. I have the same result as using many writes
for one picture.

> IIUC, streaming should be enabled in Open() to reserve the device.

API says ioctl returns EINVAL when
"Streaming I/O is not supported, the buffer type is not supported, or no
buffers have been allocated (memory mapping) or enqueued (output) yet."
I'm afraid we can't enable stream until we started buffering.


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