Running the "Stream video from a capture video device (/dev/video1) to an
output video device (/dev/video2)" example from the manpage with vivid
as the output device failed with a error message.
vedant@pc ~$ v4l2-ctl --list-devices
vivid (platform:vivid-000):
/dev/video2
/dev/video3
/dev/radio0
/dev/radio1
/dev/vbi0
/dev/vbi1
/dev/swradio0
/dev/media1
HD WebCam: HD WebCam (usb-0000:00:14.0-7):
/dev/video0
/dev/video1
/dev/media0
vedant@pc ~$ v4l2-ctl -d0 --stream-mmap --out-device /dev/video3 --stream-out-dmabuf
VIDIOC_G_FMT returned -1 (Invalid argument)
<VIDIOC_QBUF: failed: Invalid argument
handle out -1
handle out2in -1
While using the --out-device mode g_fmt must be operated on out_fd as
well. determine_field was called on fps_timestamp object for output, but was
not passed out_fd.
This patch fixes the VIDIOC_G_FMT returned -1 (Invalid argument) error.
Signed-off-by: Vedant Paranjape <vedantparanjape160201@xxxxxxxxx>
---
utils/v4l2-ctl/v4l2-ctl-streaming.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
index 752ea140..7f6482d6 100644
--- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
@@ -2666,7 +2666,7 @@ static void streaming_set_cap2out(cv4l_fd &fd, cv4l_fd &out_fd)
unsigned cnt = 0;
cv4l_fmt fmt[2];
- fd.g_fmt(fmt[OUT], out.g_type());
+ out_fd.g_fmt(fmt[OUT], out.g_type());
fd.g_fmt(fmt[CAP], in.g_type());
if (!(capabilities & (V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_VIDEO_CAPTURE_MPLANE |
@@ -2757,7 +2757,7 @@ static void streaming_set_cap2out(cv4l_fd &fd, cv4l_fd &out_fd)
}
fps_ts[CAP].determine_field(fd.g_fd(), in.g_type());
- fps_ts[OUT].determine_field(fd.g_fd(), out.g_type());
+ fps_ts[OUT].determine_field(out_fd.g_fd(), out.g_type());
if (fd.streamon() || out_fd.streamon())
goto done;
--
2.25.1
