名词解释
- H.264/AVC：en.wikipedia.org/wiki/Advanc…
- H.265/HEVC：en.wikipedia.org/wiki/High_E…
- HDR：en.wikipedia.org/wiki/High-d…
- Dolby Vision: en.wikipedia.org/wiki/Dolby_…
参考：h264和h265区别
FFmpeg Guide
- Colorspace support in FFmpeg：trac.ffmpeg.org/wiki/colors…
- H.264 Video Encoding Guide：trac.ffmpeg.org/wiki/Encode…
- H.265/HEVC Video Encoding Guide：trac.ffmpeg.org/wiki/Encode…
准备环境
- 下载视频
下载：drive.google.com/file/d/12pl…
- 安装FFmpeg
- macOS：
brew install ffmpeg - Windows：
choco install ffmpeg
- macOS：
- 安装MediaInfo
- macOS：
TODO - Windows：
choco install mediainfo-cli
- macOS：
获取初步信息
$ ffprobe -hide_banner -loglevel error -select_streams v -print_format json -show_streams hdr_video.MOV
{
"streams": [
{
"index": 0,
"codec_name": "hevc",
"codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
"profile": "Main 10",
"codec_type": "video",
"codec_tag_string": "hvc1",
"codec_tag": "0x31637668",
"width": 1920,
"height": 1080,
"coded_width": 1920,
"coded_height": 1088,
"closed_captions": 0,
"film_grain": 0,
"has_b_frames": 2,
"pix_fmt": "yuv420p10le",
"level": 120,
"color_range": "tv",
"color_space": "bt2020nc",
"color_transfer": "arib-std-b67",
"color_primaries": "bt2020",
"chroma_location": "left",
"refs": 1,
"id": "0x1",
"r_frame_rate": "30/1",
"avg_frame_rate": "30/1",
"time_base": "1/600",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 7460,
"duration": "12.433333",
"bit_rate": "8510054",
"nb_frames": "373",
"extradata_size": 125,
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"creation_time": "2021-09-30T14:03:33.000000Z",
"language": "und",
"handler_name": "Core Media Video",
"vendor_id": "[0][0][0][0]",
"encoder": "HEVC"
},
"side_data_list": [
{
"side_data_type": "DOVI configuration record",
"dv_version_major": 1,
"dv_version_minor": 0,
"dv_profile": 8,
"dv_level": 4,
"rpu_present_flag": 1,
"el_present_flag": 0,
"bl_present_flag": 1,
"dv_bl_signal_compatibility_id": 4
},
{
"side_data_type": "Display Matrix",
"displaymatrix": "\n00000000: 0 -65536 0\n00000001: 65536 0 0\n00000002: 0 125829120 1073741824\n",
"rotation": 90
}
]
}
]
}
$ mediainfo hdr_video.MOV
General
Complete name : hdr_video.MOV
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.00 (qt )
File size : 13.0 MiB
Duration : 12 s 433 ms
Overall bit rate mode : Variable
Overall bit rate : 8 770 kb/s
Encoded date : UTC 2021-09-30 14:03:33
Tagged date : UTC 2021-09-30 14:03:47
Writing library : Apple QuickTime
com.apple.quicktime.location.accuracy.ho : 4.772172
com.apple.quicktime.location.ISO6709 : +37.7383+029.0918+507.727/
com.apple.quicktime.make : Apple
com.apple.quicktime.model : iPhone 12 Pro Max
com.apple.quicktime.software : 15.0
com.apple.quicktime.creationdate : 2021-09-30T17:03:33+0300
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L4@Main
HDR format : Dolby Vision, Version 1.0, dvhe.08.04, BL+RPU, HLG compatible
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 12 s 433 ms
Bit rate : 8 510 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Rotation : 270°
Frame rate mode : Constant
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.137
Stream size : 12.6 MiB (97%)
Title : Core Media Video
Encoded date : UTC 2021-09-30 14:03:33
Tagged date : UTC 2021-09-30 14:03:47
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : HLG
Matrix coefficients : BT.2020 non-constant
Metas : 3,4,5
Codec configuration box : hvcC+dvvC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 12 s 433 ms
Source duration : 12 s 492 ms
Bit rate mode : Variable
Bit rate : 175 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 265 KiB (2%)
Source stream size : 266 KiB (2%)
Title : Core Media Audio
Encoded date : UTC 2021-09-30 14:03:33
Tagged date : UTC 2021-09-30 14:03:47
初步信息详解
codec/profile
"codec_name": "hevc",
"codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
"profile": "Main 10",
"codec_type": "video",
"codec_tag_string": "hvc1",
"codec_tag": "0x31637668",
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L4@Main
...
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
codec_name：H.265/HEVC编码格式
profile：Main 10配置
codec_tag_string：hvc1标签
参考：
pix_fmt
"pix_fmt": "yuv420p10le",
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
pix_fmt：YUV像素格式，4:2:0采样（每四个 Y 分量共享一组 UV 分量），planar平面格式，10bit位深，little endian排列
疑问：yuv420p10le和p010le一样么？
疑问：H264能支持10bit位深？
color_space
"color_range": "tv",
"color_space": "bt2020nc",
"color_transfer": "arib-std-b67",
"color_primaries": "bt2020",
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : HLG
Matrix coefficients : BT.2020 non-constant
color_range：TV levels取值范围
color_space：YUV色彩空间上，采用BT.2020 non-constant矩阵系数
color_transfer：HLG/ARIB STD-B67转换函数
color_primaries：BT.2020
参考：
Dolby Vision
"side_data_type": "DOVI configuration record",
"dv_version_major": 1,
"dv_version_minor": 0,
"dv_profile": 8,
"dv_level": 4,
"rpu_present_flag": 1,
"el_present_flag": 0,
"bl_present_flag": 1,
"dv_bl_signal_compatibility_id": 4
HDR format : Dolby Vision, Version 1.0, dvhe.08.04, BL+RPU, HLG compatible
dv_version_major/dv_version_minor：Dobly Vision版本1.0
dv_profile/dv_level：Dobly Vision配置8.4
rpu_present_flag/el_present_flag/bl_present_flag：有Base Layer，没有Enhancement Layer，采用Reference Picture Unit放置元信息
参考：
