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• how to reduce bitrate in hevc_vaapi and maintain good video quality in ffmpeg live streaming

  6 janvier 2017, par cold1746

  i tried the following code but i didint workout

  $ ffmpeg -vaapi_device /dev/dri/renderD128  -i input -vf 
  
  'format=nv12,hwupload,scale_vaapi=720:576' -preset slow -c:v hevc_vaapi -b:v 600k -maxrate 600k -bufsize 300k 
  
  -codec:a aac -b:a 96k -f mpegts -bf 0

  and
  vainfo is

  libva info : VA-API version 0.39.0 libva info : va_getDriverName()
  returns 0 libva info : Trying to open
  /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so libva info : Found init
  function __vaDriverInit_0_39 libva info : va_openDriver() returns 0
  vainfo : VA-API version : 0.39 (libva 1.7.0) vainfo : Driver version :
  Intel i965 driver for Intel(R) Skylake - 1.7.0 vainfo : Supported
  profile and entrypoints
  VAProfileMPEG2Simple : VAEntrypointVLD
  VAProfileMPEG2Simple : VAEntrypointEncSlice
  VAProfileMPEG2Main : VAEntrypointVLD
  VAProfileMPEG2Main : VAEntrypointEncSlice
  VAProfileH264ConstrainedBaseline : VAEntrypointVLD
  VAProfileH264ConstrainedBaseline : VAEntrypointEncSlice
  VAProfileH264Main : VAEntrypointVLD
  VAProfileH264Main : VAEntrypointEncSlice
  VAProfileH264High : VAEntrypointVLD
  VAProfileH264High : VAEntrypointEncSlice
  VAProfileH264MultiviewHigh : VAEntrypointVLD
  VAProfileH264MultiviewHigh : VAEntrypointEncSlice
  VAProfileH264StereoHigh : VAEntrypointVLD
  VAProfileH264StereoHigh : VAEntrypointEncSlice
  VAProfileVC1Simple : VAEntrypointVLD
  VAProfileVC1Main : VAEntrypointVLD
  VAProfileVC1Advanced : VAEntrypointVLD
  VAProfileNone : VAEntrypointVideoProc
  VAProfileJPEGBaseline : VAEntrypointVLD
  VAProfileJPEGBaseline : VAEntrypointEncPicture
  VAProfileVP8Version0_3 : VAEntrypointVLD
  VAProfileVP8Version0_3 : VAEntrypointEncSlice
  VAProfileHEVCMain : VAEntrypointVLD
  VAProfileHEVCMain : VAEntrypointEncSlice

  and mediainfo is

  General Complete name : c.avi Format
   : AVI Format/Info : Audio Video
  Interleave Format profile : OpenDML File
  size : 1.17 GiB Duration
   : 1mn 0s Overall bit rate : 168 Mbps Writing
  application : Lavf56.40.101

  Video ID : 0 Format
   : ProRes Format version : Version 0 Format
  profile : High Codec ID
   : apch Duration : 1mn 0s Bit rate
   : 166 Mbps Width : 1 920 pixels
  Height : 1 080 pixels Display aspect
  ratio : 16:9 Frame rate
   : 24.000 fps Color space : YUV Chroma
  subsampling : 4:2:2 Scan type
   : Progressive Bits/(Pixel*Frame) : 3.343 Stream
  size : 1.16 GiB (99%) Writing library
   : abm0 Matrix coefficients : BT.709

  Audio ID : 1 Format
   : PCM Format settings, Endianness : Little Format
  settings, Sign : Signed Codec ID
   : 1 Duration : 1mn 0s Bit rate mode
   : Constant Bit rate : 1 536 Kbps
  Channel(s) : 2 channels Sampling rate
   : 48.0 KHz Bit depth : 16 bits Stream
  size : 11.0 MiB (1%) Alignment
   : Aligned on interleaves Interleave, duration : 21
  ms (0.50 video frame)

  im getting less file size and good quality for hevc encoding

• It’s Piwik Analytics Survey time : Your Opinion Matters !

  8 janvier 2017, par Piwik Core Team — Community

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  14 mars 2017, par InnoCraft — Community

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