问题描述
输入命令解析 H265 的码流信息，得到Level 等于 93，与理论知识不符合呀！
ffprobe version 7.1 Copyright (c) 2007-2024 the FFmpeg developers
built with Apple clang version 16.0.0 (clang-1600.0.26.4)
configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/7.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
libavutil 59. 39.100 / 59. 39.100
libavcodec 61. 19.100 / 61. 19.100
libavformat 61. 7.100 / 61. 7.100
libavdevice 61. 3.100 / 61. 3.100
libavfilter 10. 4.100 / 10. 4.100
libswscale 8. 3.100 / 8. 3.100
libswresample 5. 3.100 / 5. 3.100
libpostproc 58. 3.100 / 58. 3.100
Input #0, hevc, from '1.h265':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: hevc (Main), yuvj420p(pc, gbr/unknown/unknown), 720x1280, 25 fps, 30 tbr, 1200k tbn
[STREAM]
index=0
codec_name=hevc
codec_long_name=H.265 / HEVC (High Efficiency Video Coding)
profile=Main
codec_type=video
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=720
height=1280
coded_width=720
coded_height=1280
closed_captions=0
film_grain=0
has_b_frames=2
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=yuvj420p
level=93
color_range=pc
color_space=gbr
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=unknown
refs=1
view_ids_available=
view_pos_available=
id=N/A
r_frame_rate=30/1
avg_frame_rate=25/1
time_base=1/1200000
start_pts=N/A
start_time=N/A
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
extradata_size=90
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
DISPOSITION:non_diegetic=0
DISPOSITION:captions=0
DISPOSITION:descriptions=0
DISPOSITION:metadata=0
DISPOSITION:dependent=0
DISPOSITION:still_image=0
DISPOSITION:multilayer=0
[/STREAM]
解答问题
还是理论知识不扎实，研究标准得到答案了，如下图：
参考
- 原文： ffprobe 输出 HEVC 码流 Level：标准的 “错位” 与分析的 “归位”
- 博客主页：码流怪侠
- 公众号：码流怪侠
