diff -ur libavcodec/libfdk-aacdec.c.bak libavcodec/libfdk-aacdec.c
--- libavcodec/libfdk-aacdec.c.bak	2017-05-05 11:14:25.953125000 +0200
+++ libavcodec/libfdk-aacdec.c	2017-05-05 11:25:41.000000000 +0200
@@ -17,6 +17,17 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#ifndef _WIN32
+#include <dlfcn.h>
+#define LIBNAME "libfdk-aac.so.1"
+#else
+#include <windows.h>
+#define LIBNAME "libfdk-aac-1.dll"
+#define dlopen(fname, f) ((void *) LoadLibraryA(fname))
+#define dlclose(handle) FreeLibrary((HMODULE) handle)
+#define dlsym(handle, name) GetProcAddress((HMODULE) handle, name)
+#endif
+
 #include <fdk-aac/aacdecoder_lib.h>
 
 #include "libavutil/channel_layout.h"
@@ -25,6 +36,37 @@
 #include "avcodec.h"
 #include "internal.h"
 
+typedef LINKSPEC_H HANDLE_AACDECODER (*imp_aacDecoder_Open)(TRANSPORT_TYPE transportFmt, UINT nrOfLayers);
+typedef LINKSPEC_H void (*imp_aacDecoder_Close)(HANDLE_AACDECODER self);
+typedef LINKSPEC_H AAC_DECODER_ERROR (*imp_aacDecoder_Fill)(HANDLE_AACDECODER self, UCHAR *pBuffer[], const UINT bufferSize[], UINT *bytesValid);
+typedef LINKSPEC_H AAC_DECODER_ERROR (*imp_aacDecoder_DecodeFrame)(HANDLE_AACDECODER self, INT_PCM *pTimeData, const INT timeDataSize, const UINT flags);
+typedef LINKSPEC_H CStreamInfo* (*imp_aacDecoder_GetStreamInfo)(HANDLE_AACDECODER self);
+typedef LINKSPEC_H AAC_DECODER_ERROR (*imp_aacDecoder_ConfigRaw)(HANDLE_AACDECODER self, UCHAR *conf[], const UINT length[]);
+typedef LINKSPEC_H AAC_DECODER_ERROR (*imp_aacDecoder_SetParam)(const HANDLE_AACDECODER self, const AACDEC_PARAM param, const INT value);
+typedef LINKSPEC_H AAC_DECODER_ERROR (*imp_aacDecoder_AncDataInit)(HANDLE_AACDECODER self, UCHAR *buffer, int size);
+
+typedef struct _aacDecLib {
+    imp_aacDecoder_Open aacDecoder_Open;
+    imp_aacDecoder_Close aacDecoder_Close;
+    imp_aacDecoder_Fill aacDecoder_Fill;
+    imp_aacDecoder_DecodeFrame aacDecoder_DecodeFrame;
+    imp_aacDecoder_ConfigRaw aacDecoder_ConfigRaw;
+    imp_aacDecoder_GetStreamInfo aacDecoder_GetStreamInfo;
+    imp_aacDecoder_SetParam aacDecoder_SetParam;
+    imp_aacDecoder_AncDataInit aacDecoder_AncDataInit;
+} aacDecLib;
+
+#define DLSYM(x) \
+    do \
+    { \
+        s->pfn.x = ( imp_##x ) dlsym(s->hLib, AV_STRINGIFY(x)); \
+        if (!s->pfn.x ) \
+        { \
+            av_log(avctx, AV_LOG_ERROR, "Unable to find symbol " AV_STRINGIFY(x) " in dynamic " LIBNAME "\n"); \
+            return -1; \
+        } \
+    } while (0)
+
 /* The version macro is introduced the same time as the setting enum was
  * changed, so this check should suffice. */
 #ifndef AACDECODER_LIB_VL0
@@ -41,6 +83,8 @@
 typedef struct FDKAACDecContext {
     const AVClass *class;
     HANDLE_AACDECODER handle;
+    void *hLib;
+    aacDecLib pfn;
     uint8_t *decoder_buffer;
     int decoder_buffer_size;
     uint8_t *anc_buffer;
@@ -85,7 +129,7 @@
 static int get_stream_info(AVCodecContext *avctx)
 {
     FDKAACDecContext *s   = avctx->priv_data;
-    CStreamInfo *info     = aacDecoder_GetStreamInfo(s->handle);
+    CStreamInfo *info     = s->pfn.aacDecoder_GetStreamInfo(s->handle);
     int channel_counts[0x24] = { 0 };
     int i, ch_error       = 0;
     uint64_t ch_layout    = 0;
@@ -197,8 +241,10 @@
 {
     FDKAACDecContext *s = avctx->priv_data;
 
-    if (s->handle)
-        aacDecoder_Close(s->handle);
+    if (s->hLib && s->handle) {
+        s->pfn.aacDecoder_Close(s->handle);
+        dlclose(s->hLib);
+    }
     av_freep(&s->decoder_buffer);
     av_freep(&s->anc_buffer);
 
@@ -210,6 +256,27 @@
     FDKAACDecContext *s = avctx->priv_data;
     AAC_DECODER_ERROR err;
 
+    if (!(s->hLib = dlopen(LIBNAME, RTLD_NOW))) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to load " LIBNAME "\n");
+        return -1;
+    }
+
+    DLSYM(aacDecoder_Open);
+#define aacDecoder_Open s->pfn.aacDecoder_Open
+    DLSYM(aacDecoder_Close);
+    DLSYM(aacDecoder_Fill);
+#define aacDecoder_Fill s->pfn.aacDecoder_Fill
+    DLSYM(aacDecoder_DecodeFrame);
+#define aacDecoder_DecodeFrame s->pfn.aacDecoder_DecodeFrame
+    DLSYM(aacDecoder_GetStreamInfo);
+#define aacDecoder_GetStreamInfo s->pfn.aacDecoder_GetStreamInfo
+    DLSYM(aacDecoder_ConfigRaw);
+#define aacDecoder_ConfigRaw s->pfn.aacDecoder_ConfigRaw
+    DLSYM(aacDecoder_SetParam);
+#define aacDecoder_SetParam s->pfn.aacDecoder_SetParam
+    DLSYM(aacDecoder_AncDataInit);
+#define aacDecoder_AncDataInit s->pfn.aacDecoder_AncDataInit
+
     s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
     if (!s->handle) {
         av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
diff -ur libavcodec/libfdk-aacenc.c.bak libavcodec/libfdk-aacenc.c
--- libavcodec/libfdk-aacenc.c.bak	2017-05-05 11:14:32.359375000 +0200
+++ libavcodec/libfdk-aacenc.c	2017-05-05 11:28:38.515625000 +0200
@@ -17,6 +17,17 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#ifndef _WIN32
+#include <dlfcn.h>
+#define LIBNAME "libfdk-aac.so.1"
+#else
+#include <windows.h>
+#define LIBNAME "libfdk-aac-1.dll"
+#define dlopen(fname, f) ((void *) LoadLibraryA(fname))
+#define dlclose(handle) FreeLibrary((HMODULE) handle)
+#define dlsym(handle, name) GetProcAddress((HMODULE) handle, name)
+#endif
+
 #include <fdk-aac/aacenc_lib.h>
 
 #include "libavutil/channel_layout.h"
@@ -26,6 +37,31 @@
 #include "audio_frame_queue.h"
 #include "internal.h"
 
+typedef AACENC_ERROR (*imp_aacEncOpen)(HANDLE_AACENCODER *phAacEncoder, const UINT encModules, const UINT maxChannels);
+typedef AACENC_ERROR (*imp_aacEncClose)(HANDLE_AACENCODER *phAacEncoder);
+typedef AACENC_ERROR (*imp_aacEncEncode)(const HANDLE_AACENCODER hAacEncoder, const AACENC_BufDesc *inBufDesc, const AACENC_BufDesc *outBufDesc, const AACENC_InArgs *inargs, AACENC_OutArgs *outargs);
+typedef AACENC_ERROR (*imp_aacEncInfo)(const HANDLE_AACENCODER hAacEncoder, AACENC_InfoStruct *pInfo);
+typedef AACENC_ERROR (*imp_aacEncoder_SetParam)(const HANDLE_AACENCODER hAacEncoder, const AACENC_PARAM param, const UINT value);
+
+typedef struct _aacEncLib {
+    imp_aacEncOpen aacEncOpen;
+    imp_aacEncClose aacEncClose;
+    imp_aacEncEncode aacEncEncode;
+    imp_aacEncInfo aacEncInfo;
+    imp_aacEncoder_SetParam aacEncoder_SetParam;
+} aacEncLib;
+
+#define DLSYM(x) \
+    do \
+    { \
+        s->pfn.x = ( imp_##x ) dlsym(s->hLib, AV_STRINGIFY(x)); \
+        if (!s->pfn.x ) \
+        { \
+            av_log(avctx, AV_LOG_ERROR, "Unable to find symbol " AV_STRINGIFY(x) " in dynamic " LIBNAME "\n"); \
+            return -1; \
+        } \
+    } while (0)
+
 typedef struct AACContext {
     const AVClass *class;
     HANDLE_AACENCODER handle;
@@ -36,6 +72,8 @@
     int header_period;
     int vbr;
 
+    void *hLib;
+    aacEncLib pfn;
     AudioFrameQueue afq;
 } AACContext;
 
@@ -93,8 +131,10 @@
 {
     AACContext *s = avctx->priv_data;
 
-    if (s->handle)
-        aacEncClose(&s->handle);
+    if (s->hLib && s->handle) {
+        s->pfn.aacEncClose(&s->handle);
+        dlclose(s->hLib);
+    }
     av_freep(&avctx->extradata);
     ff_af_queue_close(&s->afq);
 
@@ -111,6 +151,21 @@
     int aot = FF_PROFILE_AAC_LOW + 1;
     int sce = 0, cpe = 0;
 
+    if (!(s->hLib = dlopen(LIBNAME, RTLD_NOW))) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to load " LIBNAME "\n");
+        return -1;
+    }
+
+    DLSYM(aacEncOpen);
+#define aacEncOpen s->pfn.aacEncOpen
+    DLSYM(aacEncClose);
+    DLSYM(aacEncEncode);
+#define aacEncEncode s->pfn.aacEncEncode
+    DLSYM(aacEncInfo);
+#define aacEncInfo s->pfn.aacEncInfo
+    DLSYM(aacEncoder_SetParam);
+#define aacEncoder_SetParam s->pfn.aacEncoder_SetParam
+
     if ((err = aacEncOpen(&s->handle, 0, avctx->channels)) != AACENC_OK) {
         av_log(avctx, AV_LOG_ERROR, "Unable to open the encoder: %s\n",
                aac_get_error(err));