From 19503dbc94851a4e1e0cfdd5cbabe1c749efcc4b Mon Sep 17 00:00:00 2001
From: Martin Pulec <pulec@cesnet.cz>
Date: Wed, 11 Jul 2018 11:22:08 +0200
Subject: [PATCH] V4L2: fixed freeze when conversion is needed

---
 src/video_capture/v4l2.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/video_capture/v4l2.c b/src/video_capture/v4l2.c
index 8652e81b3..59e3b00d3 100644
--- a/src/video_capture/v4l2.c
+++ b/src/video_capture/v4l2.c
@@ -730,8 +730,10 @@ static struct video_frame * vidcap_v4l2_grab(void *state, struct audio_frame **a
 
                 // we do not need the driver buffer any more
                 if (ioctl(s->fd, VIDIOC_QBUF, &buf) != 0) {
-                        perror("Unable to enqueue buffer");
-                };
+                        log_msg(LOG_LEVEL_ERROR, "[V4L2 capture] Unable to enqueue buffer: %s\n", strerror(errno));
+                } else {
+                        s->dequeued_buffers -= 1;
+                }
 
                 if(ret == -1) {
                         fprintf(stderr, "Error converting video.\n");