FFmpeg 4.0是这一全球最流行的视频处理工具在过去近两年时间内的一次重大更新，包括增加对3月刚刚完成1.0版定稿的AV1的支持。感谢FFmpeg开发者、OnVideo联合创始人刘歧提供新闻线索和审校。

北京时间4月20日消息，全球最流行的视频处理工具FFmpeg发布了代号为“Wu”的4.0版，并在官网提供了下载地址。

FFmpeg 4.0版更新重点更新如下，其中包括对今年3月刚刚1.0定稿的AV1的支持：

Bitstream filters for editing metadata in H.264, HEVC and MPEG-2 streams

Intel QSV-accelerated MJPEG encoding

NVIDIA NVDEC-accelerated H.264, HEVC, MJPEG, MPEG-1/2/4, VC1, VP8/9 hwaccel decoding

Intel QSV-accelerated overlay filter

OpenCL overlay filter

support LibreSSL (via libtls)

Removed the ffserver program

Add android_camera indev

AV1 Support through libaom

Haivision SRT protocol via libsrt

FFmpeg 4.0全部更新包括：

Bitstream filters for editing metadata in H.264, HEVC and MPEG-2 streams

Experimental MagicYUV encoder

TiVo ty/ty+ demuxer

Intel QSV-accelerated MJPEG encoding

native aptX and aptX HD encoder and decoder

NVIDIA NVDEC-accelerated H.264, HEVC, MJPEG, MPEG-1/2/4, VC1, VP8/9 hwaccel decoding

Intel QSV-accelerated overlay filter

mcompand audio filter

acontrast audio filter

OpenCL overlay filter

video mix filter

video normalize filter

audio lv2 wrapper filter

VAAPI MJPEG and VP8 decoding

AMD AMF H.264 and HEVC encoders

video fillborders filter

video setrange filter

support LibreSSL (via libtls)

Dropped support for building for Windows XP. The minimum supported Windows version is Windows Vista.

deconvolve video filter

entropy video filter

hilbert audio filter source

aiir audio filter

Removed the ffserver program

Removed the ffmenc and ffmdec muxer and demuxer

VideoToolbox HEVC encoder and hwaccel

VAAPI-accelerated ProcAmp (color balance), denoise and sharpness filters

Add android_camera indev

codec2 en/decoding via libcodec2

native SBC encoder and decoder

drmeter audio filter

hapqa_extract bitstream filter

filter_units bitstream filter

AV1 Support through libaom

E-AC-3 dependent frames support

bitstream filter for extracting E-AC-3 core

Haivision SRT protocol via libsrt

vfrdet filter