Recherche avancée

Sur d’autres sites (7258)

• x86 : hevc_mc : split differently calls

  24 août 2014, par Christophe Gisquet

  x86 : hevc_mc : split differently calls
  In some cases, 2 or 3 calls are performed to functions for unusual
  
  widths. Instead, perform 2 calls for different widths to split the
  
  workload.
  The 8+16 and 4+8 widths for respectively 8 and more than 8 bits can’t
  
  be processed that way without modifications : some calls use unaligned
  
  buffers, and having branches to handle this was resulting in no
  
  micro-benchmark benefit.
  For block_w == 12 (around 1% of the pixels of the sequence) :
  
  Before :
  
  12758 decicycles in epel_uni, 4093 runs, 3 skips
  
  19389 decicycles in qpel_uni, 8187 runs, 5 skips
  
  22699 decicycles in epel_bi, 32743 runs, 25 skips
  
  34736 decicycles in qpel_bi, 32733 runs, 35 skips
  After :
  
  11929 decicycles in epel_uni, 4096 runs, 0 skips
  
  18131 decicycles in qpel_uni, 8184 runs, 8 skips
  
  20065 decicycles in epel_bi, 32750 runs, 18 skips
  
  31458 decicycles in qpel_bi, 32753 runs, 15 skips
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/x86/hevcdsp_init.c

• Revision fee045d13a : Disable adaptive pred filter for non-split mode If sf->disable_split_mask is DI

  24 février 2014, par Yunqing Wang

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
  
  Disable adaptive pred filter for non-split mode

  If sf->disable_split_mask is DISABLE_ALL_SPLIT, disable
  sf->adaptive_pred_interp_filter to avoid unnecessary operations.

  Change-Id : Icb59174b2f4e9a3c3c16a696deb8018e5bd999eb

• Split audio in segments on silence with ffmpeg

  28 mars 2020, par Maral

  I’m trying to automatically split audio files in 5min segments without splitting words and by splitting on silent parts.
  Do you know any ways to do this ?

  Is there a way I can combine these 2 scripts and also make the duration of the splits less than (around) 5 mins ?

  ffmpeg -i filename -af silencedetect=noise=-30dB:d=0.5 -f null - 2

  and

   ffmpeg -i test.mp3 -ss 00:00:20 -to 00:00:40 -c copy -y temp.mp3

  I tried using these in my Go code like this, but it looks like it isn’t the right way.

  package main
  
  
  
  
  
  import (
  
  "fmt"
  
  "os/exec"
  
  "os"
  
  "io/ioutil"
  
  "log"
  
  )
  
  
  
  func main() {
  
  filename := "test.wav"
  
  args := []string{"-i", filename, "-af", "silentdetect=noise=-30dB:d=0.5","-f", "null", "-","2>", "output.txt"}
  
      cmd := exec.Command("ffmpeg", args...)
  
      errcmd := cmd.Run()
  
      if errcmd != nil {
  
          fmt.Println(errcmd)
  
          fmt.Println("problem detecting silence")
  
      } else {
  
          fmt.Println("silence detected")
  
      }
  
  
  
  file, err := os.Open("output.txt")
  
      if err != nil {
  
          fmt.Println(err)
  
      }
  
  
  
  body, readErr := ioutil.ReadAll(file)
  
      if readErr != nil {
  
          log.Fatal(readErr)
  
      }
  
  
  
  //somehow read silent start time and end time from the file and split
  
  
  
  }