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• lavfi/hqdn3d : add slice thread optimization

  2 octobre 2019, par Jun Zhao

  lavfi/hqdn3d : add slice thread optimization
  Enabled one thread per plane, used the test command for 1080P video
  
  (YUV420P format) as follow :
  ffmpeg -i 1080p.mp4 -an -vf hqdn3d -f null /dev/nul
  This optimization improved the performance about 30% in 1080P YUV420P
  
  case (from 110fps to 143fps), also pass the framemd5 check and FATE.
  Reviewed-by : Paul B Mahol <onemda@gmail.com>
  
  Reviewed-by : Moritz Barsnick <barsnick@gmx.net>
  
  Signed-off-by : Jun Zhao <barryjzhao@tencent.com>
  

  • [DH] libavfilter/vf_hqdn3d.c
  • [DH] libavfilter/vf_hqdn3d.h

• Creating a .m3u8 file for .ts files that already exist

  25 octobre 2019, par user12267838

  I need to create an m3u8 file - either from scratch or with a program - for existing .ts files that I have.

  I have 10 .ts files, all are the same duration, same fps, etc..

  I tried generating an m3u8, but the VLC Player shows a corrupted file every time I play it. The duration is incorrect, the video freezes at some parts while other parts play choppy and even lose all quality.

  I tried using FFmpeg to create a .m3u8 file for another mp4 that does not have the same content as the .ts files, but should be the same fps and the same duration of all .ts files combined.

  Here is the command which failed me :

  `ffmpeg -i background.mp4 -g 50 -hls_time 2 output.m3u8`

  ---

  I tried creating a m3u8 file from scratch,

  like this :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:4
  
  #EXT-X-MEDIA-SEQUENCE:5
  
  #EXTINF:2.000000,
  
  export-1080p--0.ts
  
  #EXTINF:2.000000,
  
  export-1080p--1.ts
  
  #EXTINF:2.000000,
  
  export-1080p--2.ts
  
  #EXTINF:2.000000,
  
  export-1080p--3.ts
  
  #EXTINF:2.000000,
  
  export-1080p--4.ts
  
  #EXTINF:2.000000,
  
  export-1080p--5.ts
  
  #EXTINF:2.000000,
  
  export-1080p--6.ts
  
  #EXTINF:1.000000,
  
  export-1080p--7.ts
  
  #EXT-X-ENDLIST

  But that failed as well.

  With ffmeg command :

  ffmpeg -i [filename.ts]

  I have checked all of my .ts files, they are all 00:00:02.02

  ---

  In this thread I have found a command, I need a similar command that allows me to use an input of multiple .ts files.

  ffmpeg -i input.ts \
   map 0 -c copy \
   f segment -segment_list out.m3u8 \
   segment_time 60 \
  out%03d.ts

  ---

  Is there a way to :

  a) create a m3u8 by hand ?

  b) use a program to create a m3u8 ?

  c) use ffmpeg to fetch the .ts files so that it makes a playable m3u8 file ?

  Does anyone know how I can get it done ?

• lavc/qsvenc : Fix bitrate_limit to allow AVC encode in limited bitrate

  15 octobre 2019, par Linjie Fu

  lavc/qsvenc : Fix bitrate_limit to allow AVC encode in limited bitrate
  MFXVideoENCODE_Query calls CheckVideoParamQueryLike in MSDK and
  
  will determine whether to set param.mfx.TargetKbps to the allowed
  
  minTargetKbps according to the bitrate_limit in extco2 buffer.
  Thus q->param.ExtParam must be set before MFXVideoENCODE_Query in case
  
  minTargetKbps is written to TargetKbps by default.
  1080P AVC encoding with option "-bitrate_limit 0 -b:v 100k" :
  
  Before patch :
  
              902 kbps
  
  After patch :
  
              156 kbps
  
  Signed-off-by : Linjie Fu <linjie.fu@intel.com>
  

  • [DH] libavcodec/qsvenc.c