diff --git a/doc/APIchanges b/doc/APIchanges
index 1b6891108d..aa92b69f79 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,10 @@ libavutil:     2014-08-09
 
 API changes, most recent first:
 
+2015-xx-xx - lavc 56.58.100 - vaapi.h
+  Deprecate old VA-API context (vaapi_context) fields that were only
+  set and used by libavcodec. They are all managed internally now.
+
 2015-xx-xx - lavu 54.31.100 - pixfmt.h
   Add a unique pixel format for VA-API (AV_PIX_FMT_VAAPI) that
   indicates the nature of the underlying storage: a VA surface. This
diff --git a/libavcodec/vaapi.c b/libavcodec/vaapi.c
index 6ac22e64fa..5dc43e1d14 100644
--- a/libavcodec/vaapi.c
+++ b/libavcodec/vaapi.c
@@ -21,6 +21,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/log.h"
 #include "h264.h"
 #include "vaapi_internal.h"
 
@@ -41,7 +42,28 @@ static void destroy_buffers(VADisplay display, VABufferID *buffers, unsigned int
     }
 }
 
-int ff_vaapi_render_picture(struct vaapi_context *vactx, VASurfaceID surface)
+int ff_vaapi_context_init(AVCodecContext *avctx)
+{
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
+    const struct vaapi_context * const user_vactx = avctx->hwaccel_context;
+
+    if (!user_vactx) {
+        av_log(avctx, AV_LOG_ERROR, "Hardware acceleration context (hwaccel_context) does not exist.\n");
+        return AVERROR(ENOSYS);
+    }
+
+    vactx->display              = user_vactx->display;
+    vactx->config_id            = user_vactx->config_id;
+    vactx->context_id           = user_vactx->context_id;
+    return 0;
+}
+
+int ff_vaapi_context_fini(AVCodecContext *avctx)
+{
+    return 0;
+}
+
+int ff_vaapi_render_picture(FFVAContext *vactx, VASurfaceID surface)
 {
     VABufferID va_buffers[3];
     unsigned int n_va_buffers = 0;
@@ -81,7 +103,7 @@ int ff_vaapi_render_picture(struct vaapi_context *vactx, VASurfaceID surface)
     return 0;
 }
 
-int ff_vaapi_commit_slices(struct vaapi_context *vactx)
+int ff_vaapi_commit_slices(FFVAContext *vactx)
 {
     VABufferID *slice_buf_ids;
     VABufferID slice_param_buf_id, slice_data_buf_id;
@@ -121,7 +143,7 @@ int ff_vaapi_commit_slices(struct vaapi_context *vactx)
     return 0;
 }
 
-static void *alloc_buffer(struct vaapi_context *vactx, int type, unsigned int size, uint32_t *buf_id)
+static void *alloc_buffer(FFVAContext *vactx, int type, unsigned int size, uint32_t *buf_id)
 {
     void *data = NULL;
 
@@ -133,22 +155,22 @@ static void *alloc_buffer(struct vaapi_context *vactx, int type, unsigned int si
     return data;
 }
 
-void *ff_vaapi_alloc_pic_param(struct vaapi_context *vactx, unsigned int size)
+void *ff_vaapi_alloc_pic_param(FFVAContext *vactx, unsigned int size)
 {
     return alloc_buffer(vactx, VAPictureParameterBufferType, size, &vactx->pic_param_buf_id);
 }
 
-void *ff_vaapi_alloc_iq_matrix(struct vaapi_context *vactx, unsigned int size)
+void *ff_vaapi_alloc_iq_matrix(FFVAContext *vactx, unsigned int size)
 {
     return alloc_buffer(vactx, VAIQMatrixBufferType, size, &vactx->iq_matrix_buf_id);
 }
 
-uint8_t *ff_vaapi_alloc_bitplane(struct vaapi_context *vactx, uint32_t size)
+uint8_t *ff_vaapi_alloc_bitplane(FFVAContext *vactx, uint32_t size)
 {
     return alloc_buffer(vactx, VABitPlaneBufferType, size, &vactx->bitplane_buf_id);
 }
 
-VASliceParameterBufferBase *ff_vaapi_alloc_slice(struct vaapi_context *vactx, const uint8_t *buffer, uint32_t size)
+VASliceParameterBufferBase *ff_vaapi_alloc_slice(FFVAContext *vactx, const uint8_t *buffer, uint32_t size)
 {
     uint8_t *slice_params;
     VASliceParameterBufferBase *slice_param;
@@ -181,7 +203,7 @@ VASliceParameterBufferBase *ff_vaapi_alloc_slice(struct vaapi_context *vactx, co
 
 void ff_vaapi_common_end_frame(AVCodecContext *avctx)
 {
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
 
     ff_dlog(avctx, "ff_vaapi_common_end_frame()\n");
 
@@ -202,7 +224,7 @@ void ff_vaapi_common_end_frame(AVCodecContext *avctx)
     CONFIG_VC1_VAAPI_HWACCEL   || CONFIG_WMV3_VAAPI_HWACCEL
 int ff_vaapi_mpeg_end_frame(AVCodecContext *avctx)
 {
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     MpegEncContext *s = avctx->priv_data;
     int ret;
 
diff --git a/libavcodec/vaapi.h b/libavcodec/vaapi.h
index 815a27e226..4448a2ec2f 100644
--- a/libavcodec/vaapi.h
+++ b/libavcodec/vaapi.h
@@ -31,6 +31,8 @@
  */
 
 #include <stdint.h>
+#include <libavutil/attributes.h>
+#include "version.h"
 
 /**
  * @defgroup lavc_codec_hwaccel_vaapi VA API Decoding
@@ -72,12 +74,14 @@ struct vaapi_context {
      */
     uint32_t context_id;
 
+#if FF_API_VAAPI_CONTEXT
     /**
      * VAPictureParameterBuffer ID
      *
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     uint32_t pic_param_buf_id;
 
     /**
@@ -86,6 +90,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     uint32_t iq_matrix_buf_id;
 
     /**
@@ -94,6 +99,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     uint32_t bitplane_buf_id;
 
     /**
@@ -102,6 +108,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     uint32_t *slice_buf_ids;
 
     /**
@@ -110,6 +117,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     unsigned int n_slice_buf_ids;
 
     /**
@@ -118,6 +126,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     unsigned int slice_buf_ids_alloc;
 
     /**
@@ -126,6 +135,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     void *slice_params;
 
     /**
@@ -134,6 +144,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     unsigned int slice_param_size;
 
     /**
@@ -142,6 +153,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     unsigned int slice_params_alloc;
 
     /**
@@ -150,6 +162,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     unsigned int slice_count;
 
     /**
@@ -157,6 +170,7 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     const uint8_t *slice_data;
 
     /**
@@ -165,7 +179,9 @@ struct vaapi_context {
      * - encoding: unused
      * - decoding: Set by libavcodec
      */
+    attribute_deprecated
     uint32_t slice_data_size;
+#endif
 };
 
 /* @} */
diff --git a/libavcodec/vaapi_h264.c b/libavcodec/vaapi_h264.c
index 55ee2fc233..ded2cb3d49 100644
--- a/libavcodec/vaapi_h264.c
+++ b/libavcodec/vaapi_h264.c
@@ -227,7 +227,7 @@ static int vaapi_h264_start_frame(AVCodecContext          *avctx,
                                   av_unused uint32_t       size)
 {
     H264Context * const h = avctx->priv_data;
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VAPictureParameterBufferH264 *pic_param;
     VAIQMatrixBufferH264 *iq_matrix;
 
@@ -292,7 +292,7 @@ static int vaapi_h264_start_frame(AVCodecContext          *avctx,
 /** End a hardware decoding based frame. */
 static int vaapi_h264_end_frame(AVCodecContext *avctx)
 {
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     H264Context * const h = avctx->priv_data;
     H264SliceContext *sl = &h->slice_ctx[0];
     int ret;
@@ -318,6 +318,7 @@ static int vaapi_h264_decode_slice(AVCodecContext *avctx,
                                    const uint8_t  *buffer,
                                    uint32_t        size)
 {
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     H264Context * const h = avctx->priv_data;
     H264SliceContext *sl  = &h->slice_ctx[0];
     VASliceParameterBufferH264 *slice_param;
@@ -326,7 +327,7 @@ static int vaapi_h264_decode_slice(AVCodecContext *avctx,
             buffer, size);
 
     /* Fill in VASliceParameterBufferH264. */
-    slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
+    slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(vactx, buffer, size);
     if (!slice_param)
         return -1;
     slice_param->slice_data_bit_offset          = get_bits_count(&sl->gb) + 8; /* bit buffer started beyond nal_unit_type */
@@ -363,4 +364,7 @@ AVHWAccel ff_h264_vaapi_hwaccel = {
     .start_frame    = vaapi_h264_start_frame,
     .end_frame      = vaapi_h264_end_frame,
     .decode_slice   = vaapi_h264_decode_slice,
+    .init           = ff_vaapi_context_init,
+    .uninit         = ff_vaapi_context_fini,
+    .priv_data_size = sizeof(FFVAContext),
 };
diff --git a/libavcodec/vaapi_internal.h b/libavcodec/vaapi_internal.h
index 918c718d14..29f46ab430 100644
--- a/libavcodec/vaapi_internal.h
+++ b/libavcodec/vaapi_internal.h
@@ -35,23 +35,53 @@
  * @{
  */
 
+typedef struct {
+    VADisplay display;                  ///< Windowing system dependent handle
+    VAConfigID config_id;               ///< Configuration ID
+    VAContextID context_id;             ///< Context ID (video decode pipeline)
+    VABufferID pic_param_buf_id;        ///< Picture parameter buffer
+    VABufferID iq_matrix_buf_id;        ///< Inverse quantiser matrix buffer
+    VABufferID bitplane_buf_id;         ///< Bitplane buffer (for VC-1 decoding)
+    VABufferID *slice_buf_ids;          ///< Slice parameter/data buffers
+    unsigned int n_slice_buf_ids;       ///< Number of effective slice buffers
+    unsigned int slice_buf_ids_alloc;   ///< Number of allocated slice buffers
+    void *slice_params;                 ///< Pointer to slice parameter buffers
+    unsigned int slice_param_size;      ///< Size of a slice parameter element
+    unsigned int slice_params_alloc;    ///< Number of allocated slice parameters
+    unsigned int slice_count;           ///< Number of slices currently filled in
+    const uint8_t *slice_data;          ///< Pointer to slice data buffer base
+    unsigned int slice_data_size;       ///< Current size of slice data
+} FFVAContext;
+
+/** Extract vaapi_context from an AVCodecContext */
+static inline FFVAContext *ff_vaapi_get_context(AVCodecContext *avctx)
+{
+    return avctx->internal->hwaccel_priv_data;
+}
+
 /** Extract VASurfaceID from an AVFrame */
 static inline VASurfaceID ff_vaapi_get_surface_id(AVFrame *pic)
 {
     return (uintptr_t)pic->data[3];
 }
 
+/** Common AVHWAccel.init() implementation */
+int ff_vaapi_context_init(AVCodecContext *avctx);
+
+/** Common AVHWAccel.uninit() implementation */
+int ff_vaapi_context_fini(AVCodecContext *avctx);
+
 /** Common AVHWAccel.end_frame() implementation */
 void ff_vaapi_common_end_frame(AVCodecContext *avctx);
 
 /** Allocate a new picture parameter buffer */
-void *ff_vaapi_alloc_pic_param(struct vaapi_context *vactx, unsigned int size);
+void *ff_vaapi_alloc_pic_param(FFVAContext *vactx, unsigned int size);
 
 /** Allocate a new IQ matrix buffer */
-void *ff_vaapi_alloc_iq_matrix(struct vaapi_context *vactx, unsigned int size);
+void *ff_vaapi_alloc_iq_matrix(FFVAContext *vactx, unsigned int size);
 
 /** Allocate a new bit-plane buffer */
-uint8_t *ff_vaapi_alloc_bitplane(struct vaapi_context *vactx, uint32_t size);
+uint8_t *ff_vaapi_alloc_bitplane(FFVAContext *vactx, uint32_t size);
 
 /**
  * Allocate a new slice descriptor for the input slice.
@@ -61,11 +91,11 @@ uint8_t *ff_vaapi_alloc_bitplane(struct vaapi_context *vactx, uint32_t size);
  * @param size the size of the slice in bytes
  * @return the newly allocated slice parameter
  */
-VASliceParameterBufferBase *ff_vaapi_alloc_slice(struct vaapi_context *vactx, const uint8_t *buffer, uint32_t size);
+VASliceParameterBufferBase *ff_vaapi_alloc_slice(FFVAContext *vactx, const uint8_t *buffer, uint32_t size);
 
 int ff_vaapi_mpeg_end_frame(AVCodecContext *avctx);
-int ff_vaapi_commit_slices(struct vaapi_context *vactx);
-int ff_vaapi_render_picture(struct vaapi_context *vactx, VASurfaceID surface);
+int ff_vaapi_commit_slices(FFVAContext *vactx);
+int ff_vaapi_render_picture(FFVAContext *vactx, VASurfaceID surface);
 
 /* @} */
 
diff --git a/libavcodec/vaapi_mpeg2.c b/libavcodec/vaapi_mpeg2.c
index 27c69cde14..a3deab124b 100644
--- a/libavcodec/vaapi_mpeg2.c
+++ b/libavcodec/vaapi_mpeg2.c
@@ -40,7 +40,7 @@ static inline int mpeg2_get_is_frame_start(MpegEncContext *s)
 static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
 {
     struct MpegEncContext * const s = avctx->priv_data;
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VAPictureParameterBufferMPEG2 *pic_param;
     VAIQMatrixBufferMPEG2 *iq_matrix;
     int i;
@@ -103,6 +103,7 @@ static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_
 static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 {
     MpegEncContext * const s = avctx->priv_data;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VASliceParameterBufferMPEG2 *slice_param;
     GetBitContext gb;
     uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
@@ -123,7 +124,7 @@ static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer
     macroblock_offset = get_bits_count(&gb);
 
     /* Fill in VASliceParameterBufferMPEG2 */
-    slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
+    slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(vactx, buffer, size);
     if (!slice_param)
         return -1;
     slice_param->macroblock_offset              = macroblock_offset;
@@ -142,4 +143,7 @@ AVHWAccel ff_mpeg2_vaapi_hwaccel = {
     .start_frame    = vaapi_mpeg2_start_frame,
     .end_frame      = ff_vaapi_mpeg_end_frame,
     .decode_slice   = vaapi_mpeg2_decode_slice,
+    .init           = ff_vaapi_context_init,
+    .uninit         = ff_vaapi_context_fini,
+    .priv_data_size = sizeof(FFVAContext),
 };
diff --git a/libavcodec/vaapi_mpeg4.c b/libavcodec/vaapi_mpeg4.c
index 5b2e9d4446..426bef2646 100644
--- a/libavcodec/vaapi_mpeg4.c
+++ b/libavcodec/vaapi_mpeg4.c
@@ -45,7 +45,7 @@ static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_
 {
     Mpeg4DecContext *ctx = avctx->priv_data;
     MpegEncContext * const s = &ctx->m;
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VAPictureParameterBufferMPEG4 *pic_param;
     VAIQMatrixBufferMPEG4 *iq_matrix;
     int i;
@@ -121,12 +121,13 @@ static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_
 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 {
     MpegEncContext * const s = avctx->priv_data;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VASliceParameterBufferMPEG4 *slice_param;
 
     ff_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
 
     /* Fill in VASliceParameterBufferMPEG4 */
-    slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
+    slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(vactx, buffer, size);
     if (!slice_param)
         return -1;
     slice_param->macroblock_offset      = get_bits_count(&s->gb) % 8;
@@ -145,6 +146,9 @@ AVHWAccel ff_mpeg4_vaapi_hwaccel = {
     .start_frame    = vaapi_mpeg4_start_frame,
     .end_frame      = ff_vaapi_mpeg_end_frame,
     .decode_slice   = vaapi_mpeg4_decode_slice,
+    .init           = ff_vaapi_context_init,
+    .uninit         = ff_vaapi_context_fini,
+    .priv_data_size = sizeof(FFVAContext),
 };
 #endif
 
@@ -157,5 +161,8 @@ AVHWAccel ff_h263_vaapi_hwaccel = {
     .start_frame    = vaapi_mpeg4_start_frame,
     .end_frame      = ff_vaapi_mpeg_end_frame,
     .decode_slice   = vaapi_mpeg4_decode_slice,
+    .init           = ff_vaapi_context_init,
+    .uninit         = ff_vaapi_context_fini,
+    .priv_data_size = sizeof(FFVAContext),
 };
 #endif
diff --git a/libavcodec/vaapi_vc1.c b/libavcodec/vaapi_vc1.c
index 63d514d54e..5ded5dba89 100644
--- a/libavcodec/vaapi_vc1.c
+++ b/libavcodec/vaapi_vc1.c
@@ -148,7 +148,7 @@ static int vaapi_vc1_start_frame(AVCodecContext *avctx, av_unused const uint8_t
 {
     VC1Context * const v = avctx->priv_data;
     MpegEncContext * const s = &v->s;
-    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VAPictureParameterBufferVC1 *pic_param;
 
     ff_dlog(avctx, "vaapi_vc1_start_frame()\n");
@@ -315,6 +315,7 @@ static int vaapi_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
 {
     VC1Context * const v = avctx->priv_data;
     MpegEncContext * const s = &v->s;
+    FFVAContext * const vactx = ff_vaapi_get_context(avctx);
     VASliceParameterBufferVC1 *slice_param;
 
     ff_dlog(avctx, "vaapi_vc1_decode_slice(): buffer %p, size %d\n", buffer, size);
@@ -326,7 +327,7 @@ static int vaapi_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
     }
 
     /* Fill in VASliceParameterBufferVC1 */
-    slice_param = (VASliceParameterBufferVC1 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
+    slice_param = (VASliceParameterBufferVC1 *)ff_vaapi_alloc_slice(vactx, buffer, size);
     if (!slice_param)
         return -1;
     slice_param->macroblock_offset       = get_bits_count(&s->gb);
@@ -343,6 +344,9 @@ AVHWAccel ff_wmv3_vaapi_hwaccel = {
     .start_frame    = vaapi_vc1_start_frame,
     .end_frame      = ff_vaapi_mpeg_end_frame,
     .decode_slice   = vaapi_vc1_decode_slice,
+    .init           = ff_vaapi_context_init,
+    .uninit         = ff_vaapi_context_fini,
+    .priv_data_size = sizeof(FFVAContext),
 };
 #endif
 
@@ -354,4 +358,7 @@ AVHWAccel ff_vc1_vaapi_hwaccel = {
     .start_frame    = vaapi_vc1_start_frame,
     .end_frame      = ff_vaapi_mpeg_end_frame,
     .decode_slice   = vaapi_vc1_decode_slice,
+    .init           = ff_vaapi_context_init,
+    .uninit         = ff_vaapi_context_fini,
+    .priv_data_size = sizeof(FFVAContext),
 };
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 2e7cf40961..a118d5b223 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,8 +29,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR  57
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR 58
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
@@ -181,6 +181,9 @@
 #ifndef FF_API_AUDIOENC_DELAY
 #define FF_API_AUDIOENC_DELAY    (LIBAVCODEC_VERSION_MAJOR < 58)
 #endif
+#ifndef FF_API_VAAPI_CONTEXT
+#define FF_API_VAAPI_CONTEXT     (LIBAVCODEC_VERSION_MAJOR < 58)
+#endif
 #ifndef FF_API_AVCTX_TIMEBASE
 #define FF_API_AVCTX_TIMEBASE    (LIBAVCODEC_VERSION_MAJOR < 59)
 #endif