[FFmpeg-devel] [PATCH] udp: ignore UDP packets without payload

[Daniel Kucera]

Time to time some devices send UDP packets without payload.
ffmpeg previously exited on receiving such packet, this patch
fixes this behaviour.

Signed-off-by: Daniel Kucera <daniel.kucera at gmail.com>
---
 libavformat/udp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libavformat/udp.c b/libavformat/udp.c
index 3835f989c4..28fa7b2354 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -1039,7 +1039,11 @@ static int udp_read(URLContext *h, uint8_t *buf, int size)
                 av_fifo_generic_read(s->fifo, buf, avail, NULL);
                 av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
                 pthread_mutex_unlock(&s->mutex);
-                return avail;
+                if (avail > 0){
+                    return avail;
+                } else {
+                    continue;
+                }
             } else if(s->circular_buffer_error){
                 int err = s->circular_buffer_error;
                 pthread_mutex_unlock(&s->mutex);
-- 
2.11.0