diff --git a/examples/sigrok-conv.sh b/examples/sigrok-conv.sh
index 1981f285..070edac9 100755
--- a/examples/sigrok-conv.sh
+++ b/examples/sigrok-conv.sh
@@ -37,7 +37,7 @@ if [ ! -z "$4" ] ; then
 fi
 
 # create channels
-rtl_433 -q -s ${rate}k -r "$file" -w F32:I:analog-1-4-1 -w F32:Q:analog-1-5-1 -w F32:AM:analog-1-6-1 -w F32:FM:analog-1-7-1 -w U8:LOGIC:logic-1-1 >/dev/null 2>&1
+rtl_433 -s ${rate}k -r "$file" -w F32:I:analog-1-4-1 -w F32:Q:analog-1-5-1 -w F32:AM:analog-1-6-1 -w F32:FM:analog-1-7-1 -w U8:LOGIC:logic-1-1 >/dev/null 2>&1
 # create version tag
 echo -n "2" >version
 # create meta data
diff --git a/examples/sigrok-open.sh b/examples/sigrok-open.sh
index 5fc9d467..6a10dfed 100755
--- a/examples/sigrok-open.sh
+++ b/examples/sigrok-open.sh
@@ -30,7 +30,7 @@ if [ ! -z "$3" ] ; then
 fi
 
 # create channels
-rtl_433 -q -s ${rate}k -r "$file" -w F32:I:analog-1-4-1 -w F32:Q:analog-1-5-1 -w F32:AM:analog-1-6-1 -w F32:FM:analog-1-7-1 -w U8:LOGIC:logic-1-1 >/dev/null 2>&1
+rtl_433 -s ${rate}k -r "$file" -w F32:I:analog-1-4-1 -w F32:Q:analog-1-5-1 -w F32:AM:analog-1-6-1 -w F32:FM:analog-1-7-1 -w U8:LOGIC:logic-1-1 >/dev/null 2>&1
 # create version tag
 echo -n "2" >version
 # create meta data
diff --git a/src/rtl_433.c b/src/rtl_433.c
index d03dc73e..b7c46d0a 100644
--- a/src/rtl_433.c
+++ b/src/rtl_433.c
@@ -1359,8 +1359,12 @@ int main(int argc, char **argv) {
                     || demod->load_info.format == S16_AM
                     || demod->load_info.format == S16_FM) {
                 demod->sample_size = sizeof(uint8_t); // CU8, AM, FM
-            } else {
+            } else if (demod->load_info.format == CS16_IQ
+                    || demod->load_info.format == CF32_IQ) {
                 demod->sample_size = sizeof(int16_t); // CF32, CS16
+            } else {
+                fprintf(stderr, "Input format invalid: %s\n", file_info_string(&demod->load_info));
+                break;
             }
             if (cfg->verbosity) {
                 fprintf(stderr, "Input format: %s\n", file_info_string(&demod->load_info));