Recherche avancée

Sur d’autres sites (6813)

• How to stream video with ffmpeg and node express

  8 septembre 2019, par Sourav Golui

  Node.js Code. I am trying to stream a high definition video to mobile video

  var constVideoUrl = 'uploads/videos/q1080/';
  
  app.get('/video', function(req, res) {
  
     res.contentType('flv');
  
  
  
     var pathToMovie = constVideoUrl + 'video-1567925616174.mp4';
  
     var proc = ffmpeg(pathToMovie)
  
       .size('320x200')
  
       .preset('flashvideo')
  
  
  
       .on('end', function() {
  
         console.log('file has been converted succesfully');
  
       })
  
       .on('error', function(err) {
  
         console.log('an error happened: ' + err.message);
  
       })
  
      .pipe(res, {end:true});
  
   });

  I used it as a video url

  <video controls="controls">
  
      <source src="http://localhost:3000/video">
  
  </source></video>

• Transcoding HEVC 4K HDR using ffmpeg and vaapi

  13 mai 2021, par P. Brand

  I am trying to transcode a 4K HEVC HDR video to a lower bitrate using ffmpeg and VAAPI hardware acceleration for my LG OLED television.

  



  I use the following file :
Video

  



  Using the following command :

  



  ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -hwaccel_device va -filter_hw_device va -i LG\ 4K\ HDR\ Demo\ -\ Daylight.mkv -map 0:0 -t 00:00:20 -c:v hevc_vaapi -sei hdr -qp:v 21 lg_vaapi.mkv


  



  But this file is not recognized as HDR on my TV.

  



  When using the libx265 encoder (which is off course much slower) it works fine :

  



  ffmpeg -i LG\ 4K\ HDR\ Demo\ -\ Daylight.mkv -t 00:00:20 -map 0:0 -c:v libx265 -preset medium -crf 18 -x265-params "colorprim=bt2020:colormatrix=bt2020nc:transfer=smpte2084:colormatrix=bt2020nc:hdr=1:info=1:repeat-headers=1:master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(11000000,40)" lg_libx265.mkv


  



  When comparing the output of mediainfo on both files I can see the following properties are not set for the video track :

  



  

  • Color range

  


  • Color primaries

  


  • Transfer characteristics

  


  



  mediainfo for vaapi encode :

  



  General
Unique ID                                : 168011494166392912924249315217763643529 
(0x7E65D636029A5354FE73998A5ED6B089)
Complete name                            : lg_vaapi.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 118 MiB
Duration                                 : 20 s 4 ms
Overall bit rate                         : 49.6 Mb/s
Writing application                      : Lavf58.20.100
Writing library                          : Lavf58.20.100
ErrorDetectionType                       : Per level 1

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5@Main
HDR format                               : SMPTE ST 2086, HDR10 compatible
Codec ID                                 : V_MPEGH/ISO/HEVC
Duration                                 : 20 s 4 ms
Bit rate                                 : 48.6 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 59.940 (60000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.098
Stream size                              : 116 MiB (98%)
Writing library                          : Lavc58.35.100 hevc_vaapi
Default                                  : Yes
Forced                                   : No
Mastering display color primaries        : Display P3
Mastering display luminance              : min: 0.0040 cd/m2, max: 1100 cd/m2


  



  mediainfo for the libx265 encode :

  



  General
Unique ID                                : 261605749278874425324960669956061374077 (0xC4CF6F42FE952004772A02D5819DA67D)
Complete name                            : lg_libx265.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 155 MiB
Duration                                 : 47 s 715 ms
Overall bit rate                         : 27.3 Mb/s
Writing application                      : Lavf58.20.100
Writing library                          : Lavf58.20.100
ErrorDetectionType                       : Per level 1

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5.1@Main
HDR format                               : SMPTE ST 2086, HDR10 compatible
Codec ID                                 : V_MPEGH/ISO/HEVC
Duration                                 : 47 s 715 ms
Bit rate                                 : 26.8 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 59.940 (60000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.054
Stream size                              : 152 MiB (98%)
Writing library                          : x265 2.8:[Linux][GCC 9.1.0][64 bit] 10bit
Encoding settings                        : cpuid=1111039 / frame-threads=3 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=1 / input-res=3840x2160 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=3 / no-allow-non-conformance / repeat-headers / annexb / no-aud / no-hrd / info / hash=0 / no-temporal-layers / open-gop / min-keyint=25 / keyint=250 / gop-lookahead=0 / bframes=4 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=20 / lookahead-slices=8 / scenecut=40 / radl=0 / no-intra-refresh / ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=2 / limit-refs=3 / no-limit-modes / me=1 / subme=2 / merange=57 / temporal-mvp / weightp / no-weightb / no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=3 / no-early-skip / rskip / no-fast-intra / no-tskip-fast / no-cu-lossless / no-b-intra / no-splitrd-skip / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=0.00 / no-rd-refine / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=crf / crf=18.0 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / ipratio=1.40 / pbratio=1.30 / aq-mode=1 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=1 / overscan=0 / videoformat=5 / range=0 / colorprim=9 / transfer=16 / colormatrix=9 / chromaloc=0 / display-window=0 / master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,50) / max-cll=0,0 / min-luma=0 / max-luma=1023 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / no-opt-cu-delta-qp / no-aq-motion / hdr / no-hdr-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=5 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-mv-type=0 / copy-pic=1 / max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : PQ
Matrix coefficients                      : BT.2020 non-constant
Mastering display color primaries        : Display P3
Mastering display luminance              : min: 0.0040 cd/m2, max: 1100 cd/m2


  



  I suspect Color range, Color primaries and Transfer characteristics are necessary to make the file recognized as HDR by my TV. 
How can I add these properties to the VAAPI encoded file ?

  



  Edit :
This patch fixes the problem :
Patch

  


• Cannot play local RTP stream

  24 janvier 2020, par gdogg371

  I have been struggling along with this issue now for a while, but am making good progress. I now have a 4k transport stream running using the below command line arguments for VLC :

  vlc --ffmpeg-hw --avcodec-hw=any dshow:// :dshow-vdev="Video (00 Pro Capture HDMI 4K+)" :dshow-adev="Audio (2- 00 Pro Capture HDMI 4K+)" :dshow-threads=8 :dshow-aspect-ratio=16\:9 :dshow-size="3840x2160" :dshow-pixel_format=yuv444p16le :dshow-tune=film :dshow-preset=lossless :dshow-profile=main10 show-vcodec=hevc_nvenc :dshow-fps=50 :dshow-crf=0 :dshow-acodec=mp4a :dshow-stereo-mode=5 :dshow-force-surround-sound=0 :dshow-ab=128 :dshow-samplerate=44100 :no-dshow-config :live-caching=3000 --sout "#transcode{venc=ffmpeg,vcodec=mpgv,threads=8,aspect=16:9,width=3840,height=2160,fps=50,acodec=a52,ab=1500,channels=6,samplerate=48000,soverlay}:rtp{dst=239.255.0.1,port=5004,mux=ts}"

  I can access the rtp stream on the same PC as I am running the stream from with the below :

  vlc -vvv rtp://@239.255.0.1:5004

  However, if I try the same commands on a different computer, connected via Ethernet to the same network, the client VLC session just hangs. I have included the log below with the verbosity set to debug. Can anyone spot anything in here suggesting why the stream won’t play ?

  -- logger module started --
  
  main debug: VLC media player - 3.0.8 Vetinari
  
  main debug: Copyright © 1996-2019 the VideoLAN team
  
  main debug: revision 3.0.8-0-gf350b6b5a7
  
  main debug: configured with ../extras/package/win32/../../../configure  '--enable-update-check' '--enable-lua' '--enable-faad' '--enable-flac' '--enable-theora' '--enable-avcodec' '--enable-merge-ffmpeg' '--enable-dca' '--enable-mpc' '--enable-libass' '--enable-schroedinger' '--enable-realrtsp' '--enable-live555' '--enable-dvdread' '--enable-shout' '--enable-goom' '--enable-caca' '--enable-qt' '--enable-skins2' '--enable-sse' '--enable-mmx' '--enable-libcddb' '--enable-zvbi' '--disable-telx' '--enable-nls' '--host=x86_64-w64-mingw32' '--with-breakpad=https://win.crashes.videolan.org' 'host_alias=x86_64-w64-mingw32' 'PKG_CONFIG_LIBDIR=/home/jenkins/workspace/vlc-release/windows/vlc-release-win32-x64/contrib/x86_64-w64-mingw32/lib/pkgconfig'
  
  main debug: using multimedia timers as clock source
  
  main debug:  min period: 1 ms, max period: 1000000 ms
  
  main debug: searching plug-in modules
  
  main debug: loading plugins cache file D:\VLC\plugins\plugins.dat
  
  main debug: recursively browsing `D:\VLC\plugins'
  
  main error: stale plugins cache: modified D:\VLC\plugins\access\libaccess_concat_plugin.dll
  
  main error: stale plugins cache: modified D:\VLC\plugins\access\libaccess_imem_plugin.dll
  
  ....
  
  ....
  
  ....
  
  main error: stale plugins cache: modified D:\VLC\plugins\visualization\libgoom_plugin.dll
  
  main error: stale plugins cache: modified D:\VLC\plugins\visualization\libprojectm_plugin.dll
  
  main error: stale plugins cache: modified D:\VLC\plugins\visualization\libvisual_plugin.dll
  
  main debug: plug-ins loaded: 494 modules
  
  main debug: opening config file (C:\Users\cg371\AppData\Roaming\vlc\vlcrc)
  
  main debug: looking for logger module matching "any": 2 candidates
  
  file debug: opening logfile `D:\VLC\Log.txt'
  
  main debug: using logger module "file"
  
  main debug: translation test: code is "en_GB"
  
  main debug: looking for keystore module matching "memory": 3 candidates
  
  main debug: using keystore module "memory"
  
  main debug: CPU has capabilities MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 FPU 
  
  main debug: Creating an input for 'Media Library'
  
  main debug: Input is a meta file: disabling unneeded options
  
  main debug: using timeshift granularity of 50 MiB
  
  main debug: using timeshift path: C:\Users\cg371\AppData\Local\Temp
  
  main debug: `file/directory:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' gives access `file' demux `directory' path `/C:/Users/cg371/AppData/Roaming/vlc/ml.xspf'
  
  main debug: creating demux: access='file' demux='directory' location='/C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' file='C:\Users\cg371\AppData\Roaming\vlc\ml.xspf'
  
  main debug: looking for access_demux module matching "file": 15 candidates
  
  main debug: no access_demux modules matched
  
  main debug: creating access: file:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf
  
  main debug:  (path: C:\Users\cg371\AppData\Roaming\vlc\ml.xspf)
  
  main debug: looking for access module matching "file": 26 candidates
  
  main debug: using access module "filesystem"
  
  main debug: looking for stream_filter module matching "prefetch,cache_read": 24 candidates
  
  cache_read debug: Using stream method for AStream*
  
  cache_read debug: starting pre-buffering
  
  cache_read debug: received first data after 1 ms
  
  cache_read debug: pre-buffering done 304 bytes in 0s - 296 KiB/s
  
  main debug: using stream_filter module "cache_read"
  
  main debug: looking for stream_filter module matching "any": 24 candidates
  
  playlist debug: using XSPF playlist reader
  
  main debug: using stream_filter module "playlist"
  
  main debug: stream filter added to 00000266f6927700
  
  main debug: looking for stream_filter module matching "any": 24 candidates
  
  main debug: no stream_filter modules matched
  
  main debug: looking for stream_directory module matching "any": 1 candidates
  
  main debug: no stream_directory modules matched
  
  main debug: attachment of directory-extractor failed for file:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf
  
  main debug: looking for stream_filter module matching "record": 24 candidates
  
  main debug: using stream_filter module "record"
  
  main debug: creating demux: access='file' demux='directory' location='/C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' file='C:\Users\cg371\AppData\Roaming\vlc\ml.xspf'
  
  main debug: looking for demux module matching "directory": 55 candidates
  
  main debug: using demux module "directory"
  
  main debug: looking for meta reader module matching "any": 2 candidates
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\reader
  
  lua debug: Trying Lua scripts in D:\VLC\lua\meta\reader
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\reader\filename.luac
  
  main debug: no meta reader modules matched
  
  main debug: `file/directory:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' successfully opened
  
  main debug: looking for xml reader module matching "any": 1 candidates
  
  main debug: using xml reader module "xml"
  
  main debug: EOF reached
  
  main debug: removing module "directory"
  
  main debug: removing module "record"
  
  main debug: removing module "playlist"
  
  main debug: removing module "cache_read"
  
  main debug: removing module "filesystem"
  
  main debug: creating audio output
  
  main debug: looking for audio output module matching "any": 6 candidates
  
  mmdevice debug: using default device
  
  mmdevice debug: display name changed: VLC media player (LibVLC 3.0.8)
  
  mmdevice debug: version 2 session control unavailable
  
  mmdevice debug: volume from -65.250000 dB to +0.000000 dB with 0.031250 dB increments
  
  main debug: using audio output module "mmdevice"
  
  main debug: keeping audio output
  
  main debug: looking for interface module matching "hotkeys,none": 16 candidates
  
  main debug: using interface module "hotkeys"
  
  main debug: looking for interface module matching "globalhotkeys,none": 16 candidates
  
  main debug: using interface module "win32"
  
  main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
  
  main debug: looking for interface module matching "any": 16 candidates
  
  main debug: looking for extension module matching "any": 1 candidates
  
  lua debug: Opening Lua Extension module
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\extensions
  
  lua debug: Trying Lua scripts in D:\VLC\lua\extensions
  
  lua debug: Trying Lua playlist script D:\VLC\lua\extensions\VLSub.luac
  
  lua debug: Scanning Lua script D:\VLC\lua\extensions\VLSub.luac
  
  lua debug: Script D:\VLC\lua\extensions\VLSub.luac has the following capability flags: 0x5
  
  main debug: using extension module "lua"
  
  main debug: using interface module "qt"
  
  main debug: processing request item: null, node: Playlist, skip: 0
  
  main debug: rebuilding array of current - root Playlist
  
  main debug: rebuild done - 1 items, index -1
  
  main debug: starting playback of new item
  
  main debug: resyncing on rtp://239.255.0.1:5004
  
  main debug: rtp://239.255.0.1:5004 is at 0
  
  main debug: creating new input thread
  
  main debug: Creating an input for 'rtp://239.255.0.1:5004'
  
  main debug: requesting art for new input thread
  
  main debug: using timeshift granularity of 50 MiB
  
  main debug: using timeshift path: C:\Users\cg371\AppData\Local\Temp
  
  main debug: `rtp://@239.255.0.1:5004' gives access `rtp' demux `any' path `@239.255.0.1:5004'
  
  main debug: creating demux: access='rtp' demux='any' location='@239.255.0.1:5004' file='\\@239.255.0.1:5004'
  
  main debug: looking for access_demux module matching "rtp": 15 candidates
  
  main debug: net: opening 239.255.0.1 datagram port 5004
  
  qt debug: IM: Setting an input
  
  main debug: looking for meta fetcher module matching "any": 1 candidates
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\fetcher
  
  lua debug: Trying Lua scripts in D:\VLC\lua\meta\fetcher
  
  main debug: no meta fetcher modules matched
  
  main debug: looking for art finder module matching "any": 2 candidates
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\art
  
  lua debug: Trying Lua scripts in D:\VLC\lua\meta\art
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\00_musicbrainz.luac
  
  lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\00_musicbrainz.luac
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\01_googleimage.luac
  
  lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\01_googleimage.luac
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\02_frenchtv.luac
  
  lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\02_frenchtv.luac
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\03_lastfm.luac
  
  main debug: using access_demux module "rtp"
  
  main debug: looking for meta reader module matching "any": 2 candidates
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\reader
  
  lua debug: Trying Lua scripts in D:\VLC\lua\meta\reader
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\reader\filename.luac
  
  lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\03_lastfm.luac
  
  main debug: no art finder modules matched
  
  main debug: no meta reader modules matched
  
  main debug: `rtp://@239.255.0.1:5004' successfully opened
  
  main debug: looking for meta fetcher module matching "any": 1 candidates
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\fetcher
  
  lua debug: Trying Lua scripts in D:\VLC\lua\meta\fetcher
  
  main debug: no meta fetcher modules matched
  
  main debug: looking for art finder module matching "any": 2 candidates
  
  lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\art
  
  lua debug: Trying Lua scripts in D:\VLC\lua\meta\art
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\00_musicbrainz.luac
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\01_googleimage.luac
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\02_frenchtv.luac
  
  lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\03_lastfm.luac
  
  main debug: no art finder modules matched
  
  main debug: exiting
  
  main debug: exiting
  
  main debug: no exit handler
  
  main debug: removing all interfaces
  
  main debug: removing module "qt"
  
  main debug: deactivating the playlist
  
  main debug: incoming request - stopping current input
  
  main debug: removing module "rtp"
  
  main debug: dead input
  
  main debug: nothing to play
  
  main debug: removing module "mmdevice"
  
  qt debug: requesting exit...
  
  qt debug: waiting for UI thread...
  
  qt debug: IM: Deleting the input
  
  qt debug: QApp exec() finished
  
  qt debug: Video is not needed anymore
  
  qt debug: Killing extension dialog provider
  
  qt debug: ExtensionsDialogProvider is quitting...
  
  main debug: removing module "lua"
  
  main debug: removing module "win32"
  
  main debug: removing module "hotkeys"
  
  main debug: destroying
  
  main debug: saving media library to file C:\Users\cg371\AppData\Roaming\vlc\ml.xspf.tmp14968
  
  main debug: looking for playlist export module matching "export-xspf": 4 candidates
  
  main debug: using playlist export module "export"
  
  main debug: removing module "export"
  
  main debug: deleting item `Media Library'
  
  main debug: deleting item `rtp://239.255.0.1:5004'
  
  main debug: deleting item `Playlist'
  
  main debug: removing module "memory"
  
  -- logger module stopped --