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diff --git a/third_party/aom/common/video_writer.h b/third_party/aom/common/video_writer.h
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+++ b/third_party/aom/common/video_writer.h
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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_COMMON_VIDEO_WRITER_H_
+#define AOM_COMMON_VIDEO_WRITER_H_
+
+#include "common/video_common.h"
+
+enum { kContainerIVF } UENUM1BYTE(AvxContainer);
+
+struct AvxVideoWriterStruct;
+typedef struct AvxVideoWriterStruct AvxVideoWriter;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Finds and opens writer for specified container format.
+// Returns an opaque AvxVideoWriter* upon success, or NULL upon failure.
+// Right now only IVF format is supported.
+AvxVideoWriter *aom_video_writer_open(const char *filename,
+                                      AvxContainer container,
+                                      const AvxVideoInfo *info);
+
+// Frees all resources associated with AvxVideoWriter* returned from
+// aom_video_writer_open() call.
+void aom_video_writer_close(AvxVideoWriter *writer);
+
+// Writes frame bytes to the file.
+int aom_video_writer_write_frame(AvxVideoWriter *writer, const uint8_t *buffer,
+                                 size_t size, int64_t pts);
+// Set fourcc.
+void aom_video_writer_set_fourcc(AvxVideoWriter *writer, uint32_t fourcc);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_COMMON_VIDEO_WRITER_H_