avconv: don't try to free threads that were not initialized.

diff --git a/avconv.c b/avconv.c
index 2ed590d086d4b93dc24a652a53d0ecf65e3d8045..9da8d8aecaa1708614e9348b5feb4b0025d9c89e 100644 (file)
--- a/avconv.c
+++ b/avconv.c
@@ -2827,7 +2827,7 @@ static void free_input_threads(void)
         InputFile *f = input_files[i];
         AVPacket pkt;
 
-        if (f->joined)
+        if (!f->fifo || f->joined)
             continue;
 
         pthread_mutex_lock(&f->fifo_lock);