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diff --git a/media/ffvpx/libavcodec/audioconvert.h b/media/ffvpx/libavcodec/audioconvert.h
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+++ b/media/ffvpx/libavcodec/audioconvert.h
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+/*
+ * audio conversion
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2008 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AUDIOCONVERT_H
+#define AVCODEC_AUDIOCONVERT_H
+
+#include "version.h"
+
+/**
+ * @file
+ * Audio format conversion routines
+ * This interface is deprecated and will be dropped in a future
+ * version. You should use the libswresample library instead.
+ */
+
+#if FF_API_AUDIO_CONVERT
+
+#include "libavutil/cpu.h"
+#include "avcodec.h"
+#include "libavutil/channel_layout.h"
+
+struct AVAudioConvert;
+typedef struct AVAudioConvert AVAudioConvert;
+
+/**
+ * Create an audio sample format converter context
+ * @param out_fmt Output sample format
+ * @param out_channels Number of output channels
+ * @param in_fmt Input sample format
+ * @param in_channels Number of input channels
+ * @param[in] matrix Channel mixing matrix (of dimension in_channel*out_channels). Set to NULL to ignore.
+ * @param flags See AV_CPU_FLAG_xx
+ * @return NULL on error
+ * @deprecated See libswresample
+ */
+
+attribute_deprecated
+AVAudioConvert *av_audio_convert_alloc(enum AVSampleFormat out_fmt, int out_channels,
+                                       enum AVSampleFormat in_fmt, int in_channels,
+                                       const float *matrix, int flags);
+
+/**
+ * Free audio sample format converter context
+ * @deprecated See libswresample
+ */
+
+attribute_deprecated
+void av_audio_convert_free(AVAudioConvert *ctx);
+
+/**
+ * Convert between audio sample formats
+ * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
+ * @param[in] out_stride distance between consecutive output samples (measured in bytes)
+ * @param[in] in array of input buffers for each channel
+ * @param[in] in_stride distance between consecutive input samples (measured in bytes)
+ * @param len length of audio frame size (measured in samples)
+ * @deprecated See libswresample
+ */
+
+attribute_deprecated
+int av_audio_convert(AVAudioConvert *ctx,
+                           void * const out[6], const int out_stride[6],
+                     const void * const  in[6], const int  in_stride[6], int len);
+
+#endif /* FF_API_AUDIO_CONVERT */
+
+#endif /* AVCODEC_AUDIOCONVERT_H */