4 files changed, 5 insertions, 4 deletions
diff --git a/libavdevice/alsa_enc.c b/libavdevice/alsa_enc.c
index 3d6bccdc2a..ac09e33c49 100644
--- a/libavdevice/alsa_enc.c
+++ b/libavdevice/alsa_enc.c
@@ -86,7 +86,7 @@ static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
     AlsaData *s = s1->priv_data;
     int res;
     int size     = pkt->size;
-    uint8_t *buf = pkt->data;
+    const uint8_t *buf = pkt->data;
 
     size /= s->frame_size;
     if (pkt->dts != AV_NOPTS_VALUE)
diff --git a/libavdevice/fbdev_enc.c b/libavdevice/fbdev_enc.c
index 898a630aa1..84ec6733ff 100644
--- a/libavdevice/fbdev_enc.c
+++ b/libavdevice/fbdev_enc.c
@@ -100,7 +100,8 @@ static av_cold int fbdev_write_header(AVFormatContext *h)
 static int fbdev_write_packet(AVFormatContext *h, AVPacket *pkt)
 {
     FBDevContext *fbdev = h->priv_data;
-    uint8_t *pin, *pout;
+    const uint8_t *pin;
+    uint8_t *pout;
     enum AVPixelFormat fb_pix_fmt;
     int disp_height;
     int bytes_to_copy;
diff --git a/libavdevice/oss_enc.c b/libavdevice/oss_enc.c
index d6a512a264..704f434c53 100644
--- a/libavdevice/oss_enc.c
+++ b/libavdevice/oss_enc.c
@@ -55,9 +55,9 @@ static int audio_write_header(AVFormatContext *s1)
 static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
 {
     OSSAudioData *s = s1->priv_data;
+    const uint8_t *buf = pkt->data;
     int len, ret;
     int size= pkt->size;
-    uint8_t *buf= pkt->data;
 
     while (size > 0) {
         len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size);
diff --git a/libavdevice/sndio_enc.c b/libavdevice/sndio_enc.c
index a595438d8a..0cf58fdc6a 100644
--- a/libavdevice/sndio_enc.c
+++ b/libavdevice/sndio_enc.c
@@ -46,7 +46,7 @@ static av_cold int audio_write_header(AVFormatContext *s1)
 static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
 {
     SndioData *s = s1->priv_data;
-    uint8_t *buf= pkt->data;
+    const uint8_t *buf = pkt->data;
     int size = pkt->size;
     int len, ret;