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h265web.js - Browser HEVC/H.265 Playback SDK

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Built and refined continuously since 2017, h265web.js PRO delivers mature browser playback with broad feature coverage and strong performance.

It covers HEVC/H.265, AVC/H.264, AV1, live streaming, VOD, WebCodec, WASM decoding, MediaInfo, snapshot, fullscreen, seek and multi-instance playback.

Recommended media server: ZLMediaKit - a strong streaming server/framework for live and VOD delivery.

If h265web.js helps your project, giving it a GitHub star is a simple way to support the work and help more developers discover it.

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Demo Entry

Good Fit For

  • Browser playback of HEVC/H.265, AVC/H.264 and AV1
  • VOD and live playback in one SDK
  • Protocol validation for MP4 / MOV / MKV / FLV / MPEG-TS / M3U8 / HLS / HTTP-FLV / WS-FLV / HTTP-TS / WS-TS / HEVC ES
  • Browser-side player projects that need seek, playbackRate, fullscreen, snapshot, MediaInfo, multi-instance playback and multi-thread decode

Feature Matrix

Feature Feature Feature Feature
HLS(LIVE) M3u8(VOD) MP4(VOD) FLV(VOD)




HTTP-FLV(LIVE) HTTP-TS(LIVE) WS-FLV(LIVE) WS-TS(LIVE)




MPEG-TS(VOD) MPEG-PS(VOD) AV1(Chrome) MOV(H.265)





HTTP-HEVC WS-HEVC MKV(HEVC) AAC(MAIN/LC)




Multi-Thread
(only:
https+nginx conf)		 Single-Thread G711A(HTTP-FLV) G711U(HTTP-FLV)




MediaInfo HEVC/H.265 AVC/H.264 Hardware decoder
(FLV/HTTP-FLV/MP4)
h265web.js mpeg.js (ts demuxer) h265web.js's H.265 decoder LICENSE
h265web.js MPEG-Demuxer.js h265web.js-wasm-decoder CYL_Free-1.0 LICENSE-Free_CN.MD

Feature Support

Supported

  • Protocol box
protocol model support desc
mp4 Video on demand Y ----
mov Video on demand Y HEVC/H.265
mkv Video on demand Y HEVC/H.265
av1 Video on demand Y Chrome
mpeg-ts Video on demand Y ----
mpeg-ps Video on demand Y ----
m3u8 Video on demand Y ----
hls Live Y ----
flv Video on demand Y ----
http-flv Live Y CodecID=12
http-ts Live Y ----
http-hevc Live Y ----
http-hevc Video on demand Y ----
websocket-hevc Live Y ----
websocket-flv Live Y ----
websocket-ts Live Y ----
HEVC/H.265 Video on demand Y ----
HEVC/H.265 Live Y ----
AVC/H.264 Video on demand Y ----
AVC/H.264 Live Y ----
  • Codec
Codec Support Desc
AVC/H.264 Y ----
HEVC/H.265 Y ----
AAC Y ----
G711A Y HTTP-FLV
G711U Y HTTP-FLV
AV1 Y Chrome
  • Features
Feature Support Desc
Hardware-Decode Y For Chrome/Safari etc...
WebCodec Y Browser-supported hardware path
SIMD Y WASM + SIMD acceleration path
MSE Y Browser MSE playback path
Video on demand Y ----
Live Y ----
Seek Y ----
AccurateSeek Y ----
Cover Image Y ----
Playing with download Y ----
Volume Y ----
Play Y ----
Pause Y ----
ReStart Y ----
PauseWithCoverImage Y ----
1080P Y ----
720P Y ----
Create multi players Y ----
Play without Audio Y ----
Cache process Y ----
Open Fullscreen Y ----
Exit Fullscreen Y ----
Play frame by frame Y ----
Snapshot Y ----
Autoplay Y HTTP-FLV 265+264
HTTP-TS 265+264
HLS 264
Cache Length Y MP4 265
Multi-thread decoder Y (HTTPS+ Conf NGINX)
Single-thread decoder Y compatible
Get MediaInfo Y ----
Get Codec Param Y Video&Audio
Get Media Duration Y Video&Audio
Get Video Size Y ----
Get Video FPS Y ----
Get Audio SampleRate Y ----
Chase Frame Y HTTP-FLV(no audio)
PlayBackRate Y H.264/H.265/AV1
Resize Y ----

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FFmpegSupportH265LiveEncode


TranscodeAndGet265CodecFileByFFmpeg

  • mp4
ffmpeg -i input.mp4 \
-vcodec libx265 -pix_fmt \
-acodec aac -ac 2 -ar 44100 \
-preset medium -maxrate 1000k -bufsize 1000k \
-vtag hvc1 \
-movflags faststart \
-y video.mp4
  • hls/m3u8 capture
ffmpeg -f avfoundation -i 1:0 \
-q 4 -r 10 \
-filter_complex "scale=1280:720" \
-pix_fmt yuv420p \
-vcodec libx265 \
-ar 22050 -ab 64k -ac 1 -acodec aac \
-threads 4 \
-preset veryfast \
-f segment \
-segment_list test.m3u8 \
-segment_time 5 \
-y /Users/numberwolf/Documents/webroot/VideoMissile/VideoMissilePlayer/res/hls1/v-%03d.ts
  • mpeg-ts
ffmpeg -ss 20 -t 10 -i ./res/xinxiaomen.mp4 \
-vcodec libx265 -x265-params "bframes=0:keyint=10" -r 24 -filter_complex "scale=720:1280" -preset fast -maxrate 800k -bufsize 800k \
-acodec aac -ar 22050 -ac 1 \
-pix_fmt yuv420p \
-f mpegts -y ./res/veilside2.ts

UpdateLog

Update Content
Time 2026/03/28
- 0.Update more powerful version
Time 2022/11/06
- 0.Update
Time 2022/11/02
- 0.Update WASM
Time 2022/10/22
- 0.Support: Hard-Decode for FLV/HTTP-FLV/MP4
- 1.Support: AVC with Mpeg-TS
Time 2022/09/13
- 0.Fixed: AVC stream loop buffer error without autoplay
Time 2022/09/12
- 0.Fixed: hevc url cannot play without text of "http"
Time 2022/08/24
- 0.Feature: Safari with native player(version>13)
Time 2022/08/23
- 0.Fixed: Buffer Progress with AVC
Time 2022/08/13
- 0.Support: Resize
Time 2022/07/27
- 0.Support: PlayBackRate
Time 2022/07/12
- 0.Fixed some problem
Time 2022/07/06-10
- 0.Support g711u (http-flv)
- 1.Fixed: HTTP-FLV(AVC) without Audio
Time 2022/07/01
- 0.Feature: HTTP-FLV(Without audio) Stream Performance optimizing
Time 2022/06/27
- 0.Fixed: problem with hls parser
Time 2022/06/26
- 0.Support g711a (http-flv)
- 1.Fixed 264(avc) flv error with mediainfo
- 2.Support Multi/Single Thread
Time 2022/05/18
- 0.Support multi-thread decode
- 1.Support mp4's cache length config
- 2.Performance optimizing
- 3.This version is for Beta
Time 2022/05/09
- 0.Suport play with Websocket 265 raw stream
Time 2022/05/07
- 0.Fixed:MP4(VOD) retry error
- 1.Support:HEVC raw stream(VOD), create with url
- 2.Support:MKV format
Time 2022/04/21
- 0.Performance optimizing
Time 2022/04/17
- New Opensource Free Protocol CYL_Free-1.0 LICENSE-Free_CN.MD
Time 2022/04/14
- 0.Support Mov File
- 1.Support HTTP-FLV/HTTP-TS/HLS Autoplay
- 2.Performance optimizing of 1080P MP4(VOD)
- 3.Retry of mp4 sniff action
- 4.Support AV1
- 5.Support Play frame by frame
- 6.Support Video Frame Snapshot
Time 2022/03/28
- 0.Support MPEG-PS(MPEG1) stream
Time 2022/03/02
- 0.Fixed h264 FLV(LIVE) can not get resolution info with retry
Time 2022/01/17
- 0.Fixed ISSUE of HLS 265 OOM Case #108
- 1.Fixed ISSUE of HLS Split Rules #105
- 2.Add New Demo index-debug.html
- 3.Fixed 10+playes of 264 play failed, stack overflow
Time 2021/12/31
- 0.Add H.264 HTTP-FLV Retry after error
Time 2021/12/24
- 0.Fixed H.264 HTTP-FLV Some Badcase with callback
Time 2021/12/19
- 0.Fixed H.264 HLS Callback's problem
Time 2021/12/08
- 0.Fixed Problem of H.264 MP4 onReadyShowDone Event
Time 2021/12/04 - In the small hours
- 0.Fixed http-flv 265 Render With crash
- 1.Fixed hls problem of fullscreen
- 2.Fixed some bugs
Time 2021/11/29 - Night
- 0.Fixed http-flv retry case and some bugs
Time 2021/11/25 - Night
- 0.Fixed httpflv/ws LIVE ignoreAudio problem
Time 2021/11/23 - Night
- 0.Fixed #90
Time 2021/11/21 - In the small hours
- 0.Support Websocket-FLV (HEVC/H.265)
- 1.Support Websocket-TS (HEVC/H.265)
- 2.Support HTTP-TS (HEVC/H.265)
Time 2021/11/16 - Evening
- 0.First request, if no response and timeout, then retry 5 times
Time 2021/11/15 - Evening
- 0.HTTP-FLV auto retry when timeout with out packet.(7s)
Time 2021/11/14 - Evening
- 0.Add wasm file of 265mb version(can memory auto grow)
- 1.Add wasm file of 512mb version(can memory auto grow)
Time 2021/11/04 - Evening
- 0.Fixed: release many times with crash
Time 2021/10/26 - Evening
- 0.Fixed some bugs
Time 2021/10/24 - Evening
- 0.Support Codec of AVC/H.264's MP4/HLS/M3u8/FLV/HTTP-FLV play
Time 2021/10/18 - Evening
- 0.Add new example
Time 2021/10/16 - Evening
- 0.Fixed: HTTP-FLV: Mediainfo's codec fault value
- 1.Update example
Time 2021/10/14 - Evening
- 0.Fixed: Mediainfo's codec fault value
Time 2021/10/13 - Evening
- 0.The player compatible with WebIDE develop, split wasm(js) and h265web.js, need include wasm(js) as single
Time 2021/10/12 - Evening
- 0.Fixed: Support HTTP-FLV(HEVC) without fps param
Time 2021/10/09 - In the small hours
- 0.Support HTTP-FLV(HEVC) LIVE, CodecID=12
- 0.MP4/FLV(VOD) performance optimizing of Seek operation(out of cache area)
Time 2021/09/27 - Evening
- 0.M3u8/MpegTS performance optimizing of Seek operation(out of cache area)
Time 2021/09/25 - In the small hours
- 0.HLS Live Fixed: Crash by OOM
- 1.HLS Live Fixed: MPEG-TS full path
- 2.HLS Live Fixed: Stop by lost stream a moment
- 3.HLS Live Fixed: Stop by unstable network
Time 2021/09/08 - Evening
- 0.Fixed: M3U8 Seek with Decode Failed
- 1.Fixed: Some MP4 Case
- 2.Config update, remove some options, make it auto set
Time 2021/09/07 - Evening
- 0.M3U8 Fixed: some error with parse mpegts file
Time 2021/09/07 - In the small hours
- 0.Bak Player Core - Fixed:MP4/FLV(VOD) Seek BUG can not seek to 0; And performance optimizing for play
Time 2021/08/15
- 0.H265/HEVC Upgrade Raw Data Player for VOD/LIVE
Time 2021/07/18
- 0.Upgrade: Player UI Style
- 1.Support: fullscreen & close fullscreen
- 2.Add Event: open/close fullscreen
Time 2021/07/11
- 0.Fixed: The player compatible with ZLMediaKit + HUAWEI HoloSens Camera LIVE Stream
Time 2021/07/04
- 0.Fixed: ISSUE#58 (When default player-core's status is caching-frames, can not pause video)
Time 2021/07/01
- 0.Add example and package.json file
Time 2021/06/27
- 0.Open Source!
- 1.Support Seek in FLV
- 2.Fixed: Seek problems with bak player core mode
- 3.Add FLV type ,and do not need set player-core
Time 2021/05/30
- 1.Fixed: Some problem with seek and play(Important)
- 2.Feature: Event/Callback of Video's cover image load finished
Time 2021/05/24
- 1.FLV VOD Play(In the bak player core mode)
Time 2021/05/21
- 1.HLS(LIVE:No audio)performance optimizing
Time 2021/05/18
- 1.HLS(LIVE) performance optimizing and add Audio
Time 2021/05/16
- 1.MP4(VOD) Fixed:BD265 Mp4 box badcase
Time 2021/05/15
- 1.Fixed: HLS Play(LIVE)
Time 2021/04/27
- 1.Fixed: Some video playing with gray block(mosic)
- 2.Fixed: Some video when playing first gop with gray block(mosic)
Time 2021/04/22
- 1.Bak player core mode(test) support: seek
- 2.Bak player core mode(test) support: yuvj420p
- 3.Others
Time 2021/04/12
- 1.Fixed bug: Some video(encode hev) play failed
- 2.Fixed bug: Some video(nalu unstandard) play failed
- 3.Fixed bug: Some video play error with mosic
Time 2021/04/07
- 1.Fixed duration error
Time 2021/03/28
- 1.Add cache process event
- 2.Fixed some bugs
- 3.Remove HLS Log
- 4.Play without audio optio(New Core)
Time 2021/03/14
- 1.Bak player core mode: Fixed: render of bytes align
Time 2021/03/12
- 1.Sorry my friends, I was too tired to make a mistake with hls feature... Now I have fixed it. _!
Time 2021/03/06
- 1.Bak player core mode, Fixed: multi-stream play badcase
Time 2021/02/28
- 1.Add function to feed 265 nalu-frame append265NaluFrame(nalBuf);
- 2.Add new library to parse 265 stream raw-parser.js
Time 2021/02/21
- 1.New SDK Project for H.265/HEVC decoder - https://github.com/numberwolf/h265web.js-wasm-decoder
Time 2021/02/18
- 1.Bak player core mode support play with audio
Time 2021/02/08
- 1.Bak player core mode (beta version , do not support play audio and seek. Make your mp4's moov box front of the mdat)
Time 2021/01/04
- 1.Player Support Hevc file
- 2.Player Support Hevc stream
- 3.Remove Play/Pause Mask
- 4.Add Event:onPlayFinish, called when play video finished

About

🔥 作者：常炎隆(Author: ChangYanlong):HEVC/H.265 网页直播/点播播放器 支持硬解！ 支持H.265的HttpFLV/HLS/MP4/TS/FLV/M3U8/Websocket播放。 🔥 A HEVC/H.265 Web Player, Support hard-decoding! for LIVE/VOD stream. Support H.265 Codec with HttpFLV/HLS/MP4/TS/FLV/M3U8/Websocket.

h265web.com

Topics

player web mp4 hls websocket wasm live m3u8 simd http-flv hevc h265 httpflv 1080p hard-decoding h265-player webcodec

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v20260331 stable pro version Latest
Apr 10, 2026
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