[Ffmpeg-devel] [PATCH] grabbing with V4L
Flavio Pimentel Duarte
flaviop
Thu Feb 23 12:54:57 CET 2006
Hi Luca!
On Wed, 22 Feb 2006, Luca Abeni wrote:
> Hi Flavio,
>
> On Tue, 2006-02-21 at 08:32 -0300, Flavio Pimentel Duarte wrote:
> [...]
>>>> I also have one question: how do I force ffmpeg to use v4l instead
>>>> v4l2 ? Is there an option for it ? In my tests I had to compile ffmpeg
>>>> using '--disable-v4l2' option, otherwise it uses v4l2.
>>> Sorry, you currently have to disable v4l2 at configure time.
>>> I'll send a patch for ffmpeg.c as soon as I'll find some time (maybe
>>> tomorrow).
>> Ok. Thanks.
> Can you try the attached patch?
It did not work at first try. But it was not your patch's
fault. I had to change v4l2.c. In open_device function, it did not close
the device after an error detection. I am sending the changes I had to do
in an attached patch.
Flavio
-------------- next part --------------
--- a/ffmpeg/libavformat/v4l2.c 2006-02-23 08:52:12.000000000 -0500
+++ b/ffmpeg/libavformat/v4l2.c 2006-02-23 08:52:22.000000000 -0500
@@ -123,12 +123,14 @@ static int device_open(const char *devna
res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
if (res < 0) {
+ close(fd);
av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
strerror(errno));
return -1;
}
if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
+ close(fd);
av_log(NULL, AV_LOG_ERROR, "Not a video capture device\n");
return -1;
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