diff --git a/QtScrcpy/decoder/decoder.cpp b/QtScrcpy/decoder/decoder.cpp
index d0d4cce..05321c1 100644
--- a/QtScrcpy/decoder/decoder.cpp
+++ b/QtScrcpy/decoder/decoder.cpp
@@ -1,6 +1,7 @@
 #include <QDebug>
 #include <QTime>
 
+#include "compat.h"
 #include "decoder.h"
 #include "frames.h"
 #include "devicesocket.h"
@@ -53,7 +54,7 @@ static void avLogCallback(void *avcl, int level, const char *fmt, va_list vl) {
 
 bool Decoder::init()
 {
-#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 9, 100)
+#ifdef QTSCRCPY_LAVF_REQUIRES_REGISTER_ALL
     av_register_all();
 #endif    
     if (avformat_network_init()) {
@@ -325,7 +326,7 @@ void Decoder::run()
         AVFrame* decodingFrame = m_frames->decodingFrame();
         // the new decoding/encoding API has been introduced by:
         // <http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=7fc329e2dd6226dfecaa4a1d7adf353bf2773726>
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 37, 0)
+#ifdef QTSCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
         int ret;
         if ((ret = avcodec_send_packet(codecCtx, &packet)) < 0) {
             char errorbuf[255] = { 0 };
@@ -371,7 +372,7 @@ void Decoder::run()
             int gotPicture = 0;
             int len = -1;
             if (decodingFrame) {
-                len = avcodec_decode_video2(codecCtx, decodingFrame, &gotpicture, &packet);
+                len = avcodec_decode_video2(codecCtx, decodingFrame, &gotPicture, &packet);
             }
             if (len < 0) {
                 qCritical("Could not decode video packet: %d", len);
diff --git a/QtScrcpy/recorder/recorder.cpp b/QtScrcpy/recorder/recorder.cpp
index ae19bda..70d1d82 100644
--- a/QtScrcpy/recorder/recorder.cpp
+++ b/QtScrcpy/recorder/recorder.cpp
@@ -1,18 +1,9 @@
 #include <QDebug>
 #include <QFileInfo>
 
+#include "compat.h"
 #include "recorder.h"
 
-// In ffmpeg/doc/APIchanges:
-// 2016-04-11 - 6f69f7a / 9200514 - lavf 57.33.100 / 57.5.0 - avformat.h
-//   Add AVStream.codecpar, deprecate AVStream.codec.
-#if    (LIBAVFORMAT_VERSION_MICRO >= 100 /* FFmpeg */ && \
-        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 33, 100)) \
-    || (LIBAVFORMAT_VERSION_MICRO < 100 && /* Libav */ \
-        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 5, 0))
-# define LAVF_NEW_CODEC_API
-#endif
-
 static const AVRational SCRCPY_TIME_BASE = {1, 1000000}; // timestamps in us
 
 Recorder::Recorder(const QString& fileName)
@@ -67,7 +58,7 @@ bool Recorder::open(AVCodec *inputCodec)
         return false;
     }
 
-#ifdef LAVF_NEW_CODEC_API
+#ifdef QTSCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
     outStream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     outStream->codecpar->codec_id = inputCodec->id;
     outStream->codecpar->format = AV_PIX_FMT_YUV420P;
@@ -126,12 +117,12 @@ bool Recorder::write(AVPacket *packet)
 
 const AVOutputFormat *Recorder::findMuxer(const char* name)
 {
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 9, 100)
+#ifdef QTSCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
     void* opaque = Q_NULLPTR;
 #endif
     const AVOutputFormat* outFormat = Q_NULLPTR;
     do {
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 9, 100)
+#ifdef QTSCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
         outFormat = av_muxer_iterate(&opaque);
 #else
         outFormat = av_oformat_next(outFormat);
@@ -152,7 +143,7 @@ bool Recorder::recorderWriteHeader(AVPacket *packet)
     // copy the first packet to the extra data
     memcpy(extradata, packet->data, packet->size);
 
-#ifdef LAVF_NEW_CODEC_API
+#ifdef QTSCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
     ostream->codecpar->extradata = extradata;
     ostream->codecpar->extradata_size = packet->size;
 #else
diff --git a/QtScrcpy/util/compat.h b/QtScrcpy/util/compat.h
new file mode 100644
index 0000000..a2ae3f1
--- /dev/null
+++ b/QtScrcpy/util/compat.h
@@ -0,0 +1,36 @@
+#ifndef COMPAT_H
+#define COMPAT_H
+#include "libavcodec/version.h"
+#include "libavformat/version.h"
+
+// In ffmpeg/doc/APIchanges:
+// 2016-04-11 - 6f69f7a / 9200514 - lavf 57.33.100 / 57.5.0 - avformat.h
+//   Add AVStream.codecpar, deprecate AVStream.codec.
+#if    (LIBAVFORMAT_VERSION_MICRO >= 100 /* FFmpeg */ && \
+        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 33, 100)) \
+    || (LIBAVFORMAT_VERSION_MICRO < 100 && /* Libav */ \
+        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 5, 0))
+# define QTSCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
+#endif
+
+// In ffmpeg/doc/APIchanges:
+// 2018-02-06 - 0694d87024 - lavf 58.9.100 - avformat.h
+//   Deprecate use of av_register_input_format(), av_register_output_format(),
+//   av_register_all(), av_iformat_next(), av_oformat_next().
+//   Add av_demuxer_iterate(), and av_muxer_iterate().
+#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 9, 100)
+# define QTSCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
+#else
+# define QTSCRCPY_LAVF_REQUIRES_REGISTER_ALL
+#endif
+
+// In ffmpeg/doc/APIchanges:
+// 2016-04-21 - 7fc329e - lavc 57.37.100 - avcodec.h
+//   Add a new audio/video encoding and decoding API with decoupled input
+//   and output -- avcodec_send_packet(), avcodec_receive_frame(),
+//   avcodec_send_frame() and avcodec_receive_packet().
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 37, 100)
+# define QTSCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
+#endif
+
+#endif // COMPAT_H
diff --git a/QtScrcpy/util/util.pri b/QtScrcpy/util/util.pri
index 8756e35..366d5c5 100644
--- a/QtScrcpy/util/util.pri
+++ b/QtScrcpy/util/util.pri
@@ -1 +1,4 @@
 include ($$PWD/mousetap/mousetap.pri)
+
+HEADERS += \
+    $$PWD/compat.h