diff --git a/src/codec/decoder/audio.rs b/src/codec/decoder/audio.rs
index 70358bd..d74d25e 100644
--- a/src/codec/decoder/audio.rs
+++ b/src/codec/decoder/audio.rs
@@ -12,6 +12,11 @@ use {packet, AudioService, ChannelLayout, Error};
 pub struct Audio(pub Opened);
 
 impl Audio {
+    #[deprecated(
+        since = "4.4.0",
+        note = "Underlying API avcodec_decode_audio4 has been deprecated since FFmpeg 3.1; \
+        consider switching to send_packet() and receive_frame()"
+    )]
     pub fn decode<P: packet::Ref>(
         &mut self,
         packet: &P,
diff --git a/src/codec/decoder/video.rs b/src/codec/decoder/video.rs
index 5bf3308..3bc4036 100644
--- a/src/codec/decoder/video.rs
+++ b/src/codec/decoder/video.rs
@@ -14,6 +14,11 @@ use {packet, Error, FieldOrder, Rational};
 pub struct Video(pub Opened);
 
 impl Video {
+    #[deprecated(
+        since = "4.4.0",
+        note = "Underlying API avcodec_decode_video2 has been deprecated since FFmpeg 3.1; \
+        consider switching to send_packet() and receive_frame()"
+    )]
     pub fn decode<P: packet::Ref>(
         &mut self,
         packet: &P,
diff --git a/src/codec/encoder/audio.rs b/src/codec/encoder/audio.rs
index 215f8b2..78875ee 100644
--- a/src/codec/encoder/audio.rs
+++ b/src/codec/encoder/audio.rs
@@ -140,6 +140,11 @@ impl AsMut<Context> for Audio {
 pub struct Encoder(pub Audio);
 
 impl Encoder {
+    #[deprecated(
+        since = "4.4.0",
+        note = "Underlying API avcodec_encode_audio2 has been deprecated since FFmpeg 3.1; \
+        consider switching to send_frame() and receive_packet()"
+    )]
     pub fn encode<P: packet::Mut>(
         &mut self,
         frame: &frame::Audio,
@@ -164,6 +169,11 @@ impl Encoder {
         }
     }
 
+    #[deprecated(
+        since = "4.4.0",
+        note = "Underlying API avcodec_encode_audio2 has been deprecated since FFmpeg 3.1; \
+        consider switching to send_eof() and receive_packet()"
+    )]
     pub fn flush<P: packet::Mut>(&mut self, out: &mut P) -> Result<bool, Error> {
         unsafe {
             let mut got: c_int = 0;
diff --git a/src/codec/encoder/video.rs b/src/codec/encoder/video.rs
index 7b4e425..4229078 100644
--- a/src/codec/encoder/video.rs
+++ b/src/codec/encoder/video.rs
@@ -415,6 +415,11 @@ impl AsMut<Context> for Video {
 pub struct Encoder(pub Video);
 
 impl Encoder {
+    #[deprecated(
+        since = "4.4.0",
+        note = "Underlying API avcodec_encode_video2 has been deprecated since FFmpeg 3.1; \
+        consider switching to send_frame() and receive_packet()"
+    )]
     #[inline]
     pub fn encode<P: packet::Mut>(
         &mut self,
@@ -443,6 +448,11 @@ impl Encoder {
         }
     }
 
+    #[deprecated(
+        since = "4.4.0",
+        note = "Underlying API avcodec_encode_video2 has been deprecated since FFmpeg 3.1; \
+        consider switching to send_frame() and receive_packet()"
+    )]
     #[inline]
     pub fn flush<P: packet::Mut>(&mut self, out: &mut P) -> Result<bool, Error> {
         unsafe {