笔记：H265文件格式分析

作者:张富春(ahfuzhang)，转载时请注明作者和引用链接，谢谢！

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H265 文件格式分析

总结

每段以 00 00 00 01 来开头
- 为什么不用长度来定位？这一点很奇怪
之后是两字节的类型信息：类型是其中 6 个 bit
不同的段有不同的格式，猜测可能是对应着某个 struct 的结构

例子文件

先使用 ffmpeg 命令行，对一个 hevc(h265) 编码的视频文件取第一帧，并保存为 h265 的裸格式：

 # 提取视频的第一帧为原始 h265 格式
ffmpeg -i input.hevc -c:v copy -frames:v 1 first_frame.h265

下面用十六进制编辑器打开 first_frame.h265 文件，分析文件的内容：

 0 00 00 01 4E 01 05 23 47 56 4A DC 5C 4C 43 3F 
94 EF C5 11 3C D1 43 A8 00 00 03 00 00 03 00 06 
66 34 11 03 EE 11 11 EE 02 01 57 5D 34 80 00 00 
00 01 40 01 0C 02 FF FF 01 60 00 00 03 00 B0 00 
00 03 00 00 03 00 96 00 00 15 C0 90 00 00 00 01 
42 01 02 01 60 00 00 03 00 B0 00 00 03 00 00 03 
00 96 00 00 A0 01 E0 20 02 1C 58 81 5E E4 59 54 
D4 04 04 04 02 00 00 00 01 44 01 C0 2C BC 14 C9 
00 00 00 01 44 01 50 0B 2F 05 3C 21 F3 16 43 0C 
1A 0A A0 52 84 3E 62 C8 61 83 41 54 0A 50 87 CC 
59 0C 30 68 2A 81 4A 10 F9 38 AC 21 07 50 87 C9 
C5 61 08 3A 84 3E 4E 2B 08 41 D4 21 FF 4D 34 9A 
B4 62 A4 D9 0C 59 25 91 48 63 96 20 82 22 4A 38 
70 A1 63 C3 C1 68 5C 18 04 82 60 42 81 4A 10 FF 
A6 9A 4D 5A 31 52 6C 86 2C 92 C8 A4 31 CB 10 41 
11 25 1C 38 50 B1 E1 E0 B4 2E 0C 02 41 30 21 40 
A5 08 7F D3 4D 26 AD 18 A9 36 43 16 49 64 52 18 
E5 88 20 88 92 8E 1C 28 58 F0 F0 5A 17 06 01 20 
98 10 A0 52 84 3F EB D7 C9 F8 8F EB F3 7C 57 84 
B8 24 C1 84 1E 42 1F F5 EB E4 FC 47 F5 F9 BE 2B 
C2 5C 12 60 C2 0F 21 0F FA F5 F2 7E 23 FA FC DF 
15 E1 2E 09 30 61 07 90 87 FE 9A 69 35 68 C5 49 
B2 18 B2 4B 22 90 C7 2C 41 04 44 94 70 E1 42 C7 
87 82 D0 B8 30 09 04 C0 85 02 94 21 FF A6 9A 4D 
5A 31 52 6C 86 2C 92 C8 A4 31 CB 10 41 11 25 1C 
38 50 B1 E1 E0 B4 2E 0C 02 41 30 21 40 A5 08 7F 
E9 A6 93 56 8C 54 9B 21 8B 24 B2 29 0C 72 C4 10 
44 49 47 0E 14 2C 78 78 2D 0B 83 00 90 4C 08 50 
29 42 1F FA F5 F2 7E 23 FA FC DF 15 E1 2E 09 30 
61 07 90 87 FE BD 7C 9F 88 FE BF 37 C5 78 4B 82 
4C 18 41 E4 21 FF AF 5F 27 E2 3F AF CD F1 5E 12 
E0 93 06 10 79 08 7F E9 A6 93 56 8C 54 9B 21 8B 
24 B2 29 0C 72 C4 10 44 49 47 0E 14 2C 78 78 2D 
0B 83 00 90 4C 08 50 29 42 1F FA F5 F2 7E 23 FA 
FC DF 15 E1 2E 09 30 61 07 89 00 00 00 01 28 01 
93 D0 11 07 3A 72 EA 63 A9 8F 18 BD 96 FE B4 11

H265 文件的格式结构大概如下：

开始	结束	长度	内容(HEX)	说明
0	3	4	00 00 00 01	h265 的nal 的分隔符
第一段				总长 46
4	5	2	4E 01	0100 1110 0000 0001 * Forbidden Bit (1 bit): 0 * NAL Type (6 bits): 100111(39), SEI 补充增强信息 * Layer ID (6 bits): 0 * Temporal ID (3 bits): 1
6	6	1	05	SEI payloadType: User data unregistered
7	7	1	23	payloadSize: 35字节
8	23	16		UUID
24	27	4	00 00 03 00	RBSP 逃码
28	44	17		???
45	45	1	80	结束标志
第二段				总长 30
46	49	4	00 00 00 01
50	51	2	40 01	0100 0000 0000 0001 * Forbidden Bit (1 bit): 0 * NAL Type (6 bits): 100000(32), VPS 视频参数集 * Layer ID (6 bits): 0 * Temporal ID (3 bits): 1
			0C	最大层数 (12)
			02	最大子层数 (2)
			FF FF	配置参数
			01 60	解码能力
			90	结束标记
		24		???
第三段				41字节
76	79	4	00 00 00 01
80	81	2	42 01	* NAL Type (6 bits): 33, 序列集参数， SPS
82	116
				???
第四段				11字节
117	120	4	00 00 00 01
121	122	2	44 01	* NAL Type (6 bits): 34, 图像参数， PPS
123	127	5
				???
第五段				462 字节
128	131	4	00 00 00 01
132	133	2	44 01	* NAL Type (6 bits): 34, 图像参数， PPS

第 6 段
554	557	4	00 00 00 01
558	559	2	28 01	* NAL Type (6 bits): 20, HEVC_NAL_IDR_N_LP
560	530564	530004		到文件结束

杂乱的笔记

下载官方文档

hevc 的官方文档的下载链接： https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.265-201802-S!!PDF-E&type=items

通过 ffmpeg c 的源码来反推格式

以下是一些杂乱的笔记，对分析 h265 文件的格式有帮助：

解析格式的源码

libavcodec/h2645_parse.h

 typedef struct H2645NAL {
    const uint8_t *data;
    int size;
 
    /**
     * Size, in bits, of just the data, excluding the stop bit and any trailing
     * padding. I.e. what HEVC calls SODB.
     */
    int size_bits;
 
    int raw_size;
    const uint8_t *raw_data;
 
    GetBitContext gb;
 
    /**
     * NAL unit type
     */
    int type;
 
    /**
     * H.264 only, nal_ref_idc
     */
    int ref_idc;
 
    /**
     * HEVC only, nuh_temporal_id_plus_1 - 1
     */
    int temporal_id;
 
    /*
     * HEVC only, identifier of layer to which nal unit belongs
     */
    int nuh_layer_id;
 
    int skipped_bytes;
    int skipped_bytes_pos_size;
    int *skipped_bytes_pos;
} H2645NAL;

libavcodec/hevc/hevc.h

NAL每一段的含义：

 /**
 * Table 7-1 – NAL unit type codes and NAL unit type classes in
 * T-REC-H.265-201802
 */
enum HEVCNALUnitType {
    HEVC_NAL_TRAIL_N        = 0,
    HEVC_NAL_TRAIL_R        = 1,
    HEVC_NAL_TSA_N          = 2,
    HEVC_NAL_TSA_R          = 3,
    HEVC_NAL_STSA_N         = 4,
    HEVC_NAL_STSA_R         = 5,
    HEVC_NAL_RADL_N         = 6,
    HEVC_NAL_RADL_R         = 7,
    HEVC_NAL_RASL_N         = 8,
    HEVC_NAL_RASL_R         = 9,
    HEVC_NAL_VCL_N10        = 10,
    HEVC_NAL_VCL_R11        = 11,
    HEVC_NAL_VCL_N12        = 12,
    HEVC_NAL_VCL_R13        = 13,
    HEVC_NAL_VCL_N14        = 14,
    HEVC_NAL_VCL_R15        = 15,
    HEVC_NAL_BLA_W_LP       = 16,
    HEVC_NAL_BLA_W_RADL     = 17,
    HEVC_NAL_BLA_N_LP       = 18,
    HEVC_NAL_IDR_W_RADL     = 19,
    HEVC_NAL_IDR_N_LP       = 20,
    HEVC_NAL_CRA_NUT        = 21,
    HEVC_NAL_RSV_IRAP_VCL22 = 22,
    HEVC_NAL_RSV_IRAP_VCL23 = 23,
    HEVC_NAL_RSV_VCL24      = 24,
    HEVC_NAL_RSV_VCL25      = 25,
    HEVC_NAL_RSV_VCL26      = 26,
    HEVC_NAL_RSV_VCL27      = 27,
    HEVC_NAL_RSV_VCL28      = 28,
    HEVC_NAL_RSV_VCL29      = 29,
    HEVC_NAL_RSV_VCL30      = 30,
    HEVC_NAL_RSV_VCL31      = 31,
    HEVC_NAL_VPS            = 32,
    HEVC_NAL_SPS            = 33,
    HEVC_NAL_PPS            = 34,
    HEVC_NAL_AUD            = 35,
    HEVC_NAL_EOS_NUT        = 36,
    HEVC_NAL_EOB_NUT        = 37,
    HEVC_NAL_FD_NUT         = 38,
    HEVC_NAL_SEI_PREFIX     = 39,
    HEVC_NAL_SEI_SUFFIX     = 40,
    HEVC_NAL_RSV_NVCL41     = 41,
    HEVC_NAL_RSV_NVCL42     = 42,
    HEVC_NAL_RSV_NVCL43     = 43,
    HEVC_NAL_RSV_NVCL44     = 44,
    HEVC_NAL_RSV_NVCL45     = 45,
    HEVC_NAL_RSV_NVCL46     = 46,
    HEVC_NAL_RSV_NVCL47     = 47,
    HEVC_NAL_UNSPEC48       = 48,
    HEVC_NAL_UNSPEC49       = 49,
    HEVC_NAL_UNSPEC50       = 50,
    HEVC_NAL_UNSPEC51       = 51,
    HEVC_NAL_UNSPEC52       = 52,
    HEVC_NAL_UNSPEC53       = 53,
    HEVC_NAL_UNSPEC54       = 54,
    HEVC_NAL_UNSPEC55       = 55,
    HEVC_NAL_UNSPEC56       = 56,
    HEVC_NAL_UNSPEC57       = 57,
    HEVC_NAL_UNSPEC58       = 58,
    HEVC_NAL_UNSPEC59       = 59,
    HEVC_NAL_UNSPEC60       = 60,
    HEVC_NAL_UNSPEC61       = 61,
    HEVC_NAL_UNSPEC62       = 62,
    HEVC_NAL_UNSPEC63       = 63,
};

解析 NAL 时函数调用链：

 int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
 CodedBitstreamUnit *unit);
 
int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
                     H265RawSEI *current, int prefix);
// 解析 type
int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
                                 H265RawNALUnitHeader *current,
                                 int expected_nal_unit_type);
// 解析消息
int FUNC(message_list)(CodedBitstreamContext *ctx, RWContext *rw,
                              SEIRawMessageList *current, int prefix);
// SEI 的格式
typedef struct SEIRawMessage {
    uint32_t     payload_type;
    uint32_t     payload_size;
    void        *payload;
    void        *payload_ref;    ///< RefStruct reference
    uint8_t     *extension_data; ///< RefStruct reference
    size_t       extension_bit_length;
} SEIRawMessage;

读取 vps 段

 int FUNC(vps)(CodedBitstreamContext *ctx, RWContext *rw,
                     H265RawVPS *current);
 
 
// vps 的结构
typedef struct H265RawVPS {
    H265RawNALUnitHeader nal_unit_header;
 
    uint8_t vps_video_parameter_set_id;
 
    uint8_t vps_base_layer_internal_flag;
    uint8_t vps_base_layer_available_flag;
    uint8_t vps_max_layers_minus1;
    uint8_t vps_max_sub_layers_minus1;
    uint8_t vps_temporal_id_nesting_flag;
 
    H265RawProfileTierLevel profile_tier_level;
 
    uint8_t vps_sub_layer_ordering_info_present_flag;
    uint8_t vps_max_dec_pic_buffering_minus1[HEVC_MAX_SUB_LAYERS];
    uint8_t vps_max_num_reorder_pics[HEVC_MAX_SUB_LAYERS];
    uint32_t vps_max_latency_increase_plus1[HEVC_MAX_SUB_LAYERS];
 
    uint8_t vps_max_layer_id;
    uint16_t vps_num_layer_sets_minus1;
    uint8_t layer_id_included_flag[HEVC_MAX_LAYER_SETS][HEVC_MAX_LAYERS];
 
    uint8_t vps_timing_info_present_flag;
    uint32_t vps_num_units_in_tick;
    uint32_t vps_time_scale;
    uint8_t vps_poc_proportional_to_timing_flag;
    uint32_t vps_num_ticks_poc_diff_one_minus1;
    uint16_t vps_num_hrd_parameters;
    uint16_t hrd_layer_set_idx[HEVC_MAX_LAYER_SETS];
    uint8_t cprms_present_flag[HEVC_MAX_LAYER_SETS];
    H265RawHRDParameters hrd_parameters[HEVC_MAX_LAYER_SETS];
 
    uint8_t vps_extension_flag;
    H265RawExtensionData extension_data;
} H265RawVPS;

参考文章

HEVC码流解析： https://blog.csdn.net/CrystalShaw/article/details/80624804
H265 之格式解析：H265之格式解析_51CTO博客_h265是什么格式

posted on 2025-02-25 17:34 ahfuzhang 阅读(14) 评论(0) 编辑收藏举报

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ahfuzhang

笔记：H265文件格式分析

H265 文件格式分析

总结

例子文件

杂乱的笔记

下载官方文档

通过 ffmpeg c 的源码来反推格式

参考文章

导航

公告

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	# 提取视频的第一帧为原始 h265 格式
	ffmpeg -i input.hevc -c:v copy -frames:v 1 first_frame.h265

	0 00 00 01 4E 01 05 23 47 56 4A DC 5C 4C 43 3F
	94 EF C5 11 3C D1 43 A8 00 00 03 00 00 03 00 06
	66 34 11 03 EE 11 11 EE 02 01 57 5D 34 80 00 00
	00 01 40 01 0C 02 FF FF 01 60 00 00 03 00 B0 00
	00 03 00 00 03 00 96 00 00 15 C0 90 00 00 00 01
	42 01 02 01 60 00 00 03 00 B0 00 00 03 00 00 03
	00 96 00 00 A0 01 E0 20 02 1C 58 81 5E E4 59 54
	D4 04 04 04 02 00 00 00 01 44 01 C0 2C BC 14 C9
	00 00 00 01 44 01 50 0B 2F 05 3C 21 F3 16 43 0C
	1A 0A A0 52 84 3E 62 C8 61 83 41 54 0A 50 87 CC
	59 0C 30 68 2A 81 4A 10 F9 38 AC 21 07 50 87 C9
	C5 61 08 3A 84 3E 4E 2B 08 41 D4 21 FF 4D 34 9A
	B4 62 A4 D9 0C 59 25 91 48 63 96 20 82 22 4A 38
	70 A1 63 C3 C1 68 5C 18 04 82 60 42 81 4A 10 FF
	A6 9A 4D 5A 31 52 6C 86 2C 92 C8 A4 31 CB 10 41
	11 25 1C 38 50 B1 E1 E0 B4 2E 0C 02 41 30 21 40
	A5 08 7F D3 4D 26 AD 18 A9 36 43 16 49 64 52 18
	E5 88 20 88 92 8E 1C 28 58 F0 F0 5A 17 06 01 20
	98 10 A0 52 84 3F EB D7 C9 F8 8F EB F3 7C 57 84
	B8 24 C1 84 1E 42 1F F5 EB E4 FC 47 F5 F9 BE 2B
	C2 5C 12 60 C2 0F 21 0F FA F5 F2 7E 23 FA FC DF
	15 E1 2E 09 30 61 07 90 87 FE 9A 69 35 68 C5 49
	B2 18 B2 4B 22 90 C7 2C 41 04 44 94 70 E1 42 C7
	87 82 D0 B8 30 09 04 C0 85 02 94 21 FF A6 9A 4D
	5A 31 52 6C 86 2C 92 C8 A4 31 CB 10 41 11 25 1C
	38 50 B1 E1 E0 B4 2E 0C 02 41 30 21 40 A5 08 7F
	E9 A6 93 56 8C 54 9B 21 8B 24 B2 29 0C 72 C4 10
	44 49 47 0E 14 2C 78 78 2D 0B 83 00 90 4C 08 50
	29 42 1F FA F5 F2 7E 23 FA FC DF 15 E1 2E 09 30
	61 07 90 87 FE BD 7C 9F 88 FE BF 37 C5 78 4B 82
	4C 18 41 E4 21 FF AF 5F 27 E2 3F AF CD F1 5E 12
	E0 93 06 10 79 08 7F E9 A6 93 56 8C 54 9B 21 8B
	24 B2 29 0C 72 C4 10 44 49 47 0E 14 2C 78 78 2D
	0B 83 00 90 4C 08 50 29 42 1F FA F5 F2 7E 23 FA
	FC DF 15 E1 2E 09 30 61 07 89 00 00 00 01 28 01
	93 D0 11 07 3A 72 EA 63 A9 8F 18 BD 96 FE B4 11

	typedef struct H2645NAL {
	const uint8_t *data;
	int size;

	/**
	* Size, in bits, of just the data, excluding the stop bit and any trailing
	* padding. I.e. what HEVC calls SODB.
	*/
	int size_bits;

	int raw_size;
	const uint8_t *raw_data;

	GetBitContext gb;

	/**
	* NAL unit type
	*/
	int type;

	/**
	* H.264 only, nal_ref_idc
	*/
	int ref_idc;

	/**
	* HEVC only, nuh_temporal_id_plus_1 - 1
	*/
	int temporal_id;

	/*
	* HEVC only, identifier of layer to which nal unit belongs
	*/
	int nuh_layer_id;

	int skipped_bytes;
	int skipped_bytes_pos_size;
	int *skipped_bytes_pos;
	} H2645NAL;

	/**
	* Table 7-1 – NAL unit type codes and NAL unit type classes in
	* T-REC-H.265-201802
	*/
	enum HEVCNALUnitType {
	HEVC_NAL_TRAIL_N = 0,
	HEVC_NAL_TRAIL_R = 1,
	HEVC_NAL_TSA_N = 2,
	HEVC_NAL_TSA_R = 3,
	HEVC_NAL_STSA_N = 4,
	HEVC_NAL_STSA_R = 5,
	HEVC_NAL_RADL_N = 6,
	HEVC_NAL_RADL_R = 7,
	HEVC_NAL_RASL_N = 8,
	HEVC_NAL_RASL_R = 9,
	HEVC_NAL_VCL_N10 = 10,
	HEVC_NAL_VCL_R11 = 11,
	HEVC_NAL_VCL_N12 = 12,
	HEVC_NAL_VCL_R13 = 13,
	HEVC_NAL_VCL_N14 = 14,
	HEVC_NAL_VCL_R15 = 15,
	HEVC_NAL_BLA_W_LP = 16,
	HEVC_NAL_BLA_W_RADL = 17,
	HEVC_NAL_BLA_N_LP = 18,
	HEVC_NAL_IDR_W_RADL = 19,
	HEVC_NAL_IDR_N_LP = 20,
	HEVC_NAL_CRA_NUT = 21,
	HEVC_NAL_RSV_IRAP_VCL22 = 22,
	HEVC_NAL_RSV_IRAP_VCL23 = 23,
	HEVC_NAL_RSV_VCL24 = 24,
	HEVC_NAL_RSV_VCL25 = 25,
	HEVC_NAL_RSV_VCL26 = 26,
	HEVC_NAL_RSV_VCL27 = 27,
	HEVC_NAL_RSV_VCL28 = 28,
	HEVC_NAL_RSV_VCL29 = 29,
	HEVC_NAL_RSV_VCL30 = 30,
	HEVC_NAL_RSV_VCL31 = 31,
	HEVC_NAL_VPS = 32,
	HEVC_NAL_SPS = 33,
	HEVC_NAL_PPS = 34,
	HEVC_NAL_AUD = 35,
	HEVC_NAL_EOS_NUT = 36,
	HEVC_NAL_EOB_NUT = 37,
	HEVC_NAL_FD_NUT = 38,
	HEVC_NAL_SEI_PREFIX = 39,
	HEVC_NAL_SEI_SUFFIX = 40,
	HEVC_NAL_RSV_NVCL41 = 41,
	HEVC_NAL_RSV_NVCL42 = 42,
	HEVC_NAL_RSV_NVCL43 = 43,
	HEVC_NAL_RSV_NVCL44 = 44,
	HEVC_NAL_RSV_NVCL45 = 45,
	HEVC_NAL_RSV_NVCL46 = 46,
	HEVC_NAL_RSV_NVCL47 = 47,
	HEVC_NAL_UNSPEC48 = 48,
	HEVC_NAL_UNSPEC49 = 49,
	HEVC_NAL_UNSPEC50 = 50,
	HEVC_NAL_UNSPEC51 = 51,
	HEVC_NAL_UNSPEC52 = 52,
	HEVC_NAL_UNSPEC53 = 53,
	HEVC_NAL_UNSPEC54 = 54,
	HEVC_NAL_UNSPEC55 = 55,
	HEVC_NAL_UNSPEC56 = 56,
	HEVC_NAL_UNSPEC57 = 57,
	HEVC_NAL_UNSPEC58 = 58,
	HEVC_NAL_UNSPEC59 = 59,
	HEVC_NAL_UNSPEC60 = 60,
	HEVC_NAL_UNSPEC61 = 61,
	HEVC_NAL_UNSPEC62 = 62,
	HEVC_NAL_UNSPEC63 = 63,
	};

	int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
	CodedBitstreamUnit *unit);

	int FUNC(sei)(CodedBitstreamContext ctx, RWContext rw,
	H265RawSEI *current, int prefix);
	// 解析 type
	int FUNC(nal_unit_header)(CodedBitstreamContext ctx, RWContext rw,
	H265RawNALUnitHeader *current,
	int expected_nal_unit_type);
	// 解析消息
	int FUNC(message_list)(CodedBitstreamContext ctx, RWContext rw,
	SEIRawMessageList *current, int prefix);
	// SEI 的格式
	typedef struct SEIRawMessage {
	uint32_t payload_type;
	uint32_t payload_size;
	void *payload;
	void *payload_ref; ///< RefStruct reference
	uint8_t *extension_data; ///< RefStruct reference
	size_t extension_bit_length;
	} SEIRawMessage;

	int FUNC(vps)(CodedBitstreamContext ctx, RWContext rw,
	H265RawVPS *current);


	// vps 的结构
	typedef struct H265RawVPS {
	H265RawNALUnitHeader nal_unit_header;

	uint8_t vps_video_parameter_set_id;

	uint8_t vps_base_layer_internal_flag;
	uint8_t vps_base_layer_available_flag;
	uint8_t vps_max_layers_minus1;
	uint8_t vps_max_sub_layers_minus1;
	uint8_t vps_temporal_id_nesting_flag;

	H265RawProfileTierLevel profile_tier_level;

	uint8_t vps_sub_layer_ordering_info_present_flag;
	uint8_t vps_max_dec_pic_buffering_minus1[HEVC_MAX_SUB_LAYERS];
	uint8_t vps_max_num_reorder_pics[HEVC_MAX_SUB_LAYERS];
	uint32_t vps_max_latency_increase_plus1[HEVC_MAX_SUB_LAYERS];

	uint8_t vps_max_layer_id;
	uint16_t vps_num_layer_sets_minus1;
	uint8_t layer_id_included_flag[HEVC_MAX_LAYER_SETS][HEVC_MAX_LAYERS];

	uint8_t vps_timing_info_present_flag;
	uint32_t vps_num_units_in_tick;
	uint32_t vps_time_scale;
	uint8_t vps_poc_proportional_to_timing_flag;
	uint32_t vps_num_ticks_poc_diff_one_minus1;
	uint16_t vps_num_hrd_parameters;
	uint16_t hrd_layer_set_idx[HEVC_MAX_LAYER_SETS];
	uint8_t cprms_present_flag[HEVC_MAX_LAYER_SETS];
	H265RawHRDParameters hrd_parameters[HEVC_MAX_LAYER_SETS];

	uint8_t vps_extension_flag;
	H265RawExtensionData extension_data;
	} H265RawVPS;