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• I need the script to work on all dav files

  4 décembre 2019, par audicom

  Script should run in recursive mode, find DAV files and start DAV to JPG conversions using FFMPEG. The script is working, identifying files in folders and starting conversions when DAV files exist, but is ignoring some DAV files.
  When I put these DAV files back in the folder it converts correctly.
  What could be wrong ?
  I thought it might be the speed of the process, since the files are being generated in the folder, the script must wait for the file to be closed and complete to act. I tried to delay the conversion process by 15 seconds using a PING, but it still skips some files.

  cd E:\VM01\1002
  
  MD "E:\COLETA SNAPSHOT\SNAPSHOT 1002"
  
  MD  "E:\COLETA SNAPSHOT\PROCESSED 1002" 
  
  
  
  :LOOP01  
  
  PING 1.1.1.1 -n 10 -w 6000 >NUL     
  
  For /R %%G in (*.Dav) do IF NOT EXIST "%%G" GOTO SKIP01
  
  
  
  :LOOP02
  
  PING 1.1.1.1 -n 10 -w 6000 >NUL    
  
  For /R %%G in (*.Dav) do IF EXIST "%%G" GOTO SKIP02
  
  REM ALL THIS WILL BE DONE IF THE DAV FILE EXISTS
  
  :
  
  :
  
  :SKIP01
  
  REM 6 SECONDS OF DELAY ...
  
  PING 1.1.1.1 -n 10 -w 6000 >NUL
  
  GOTO LOOP01
  
  :
  
  :
  
  :SKIP02
  
  REM START CONVERSION
  
  PING 1.1.1.1  -n 10 -w 15000 >NUL
  
  For /R %%G in (*.Dav) do IF EXIST "%%G" ffmpeg -i "%%G" -r 0.2 -bt 20M -s 480x300 "%%~nG"%%06d.jpg
  
  for /r %%G in (*.Dav) do Move "%%G" "E:\COLETA SNAPSHOT\PROCESSED 1002"
  
  Move "*.jpg" "E:\COLETA SNAPSHOT\SNAPSHOT 1002" 
  
  PING 1.1.1.1  -n 10 -w 3000 >NUL
  
  )
  
  GOTO LOOP01

• FFMPEG CPU encoding speed

  22 janvier 2020, par natloz

  I would like to increase the speed of encoding videos. Thou having issue with it...

  This is my CPU : Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz
  OS : Windows 10 PRO 64bit

  I don’t have a graphics card.

  This is the script I’m using for current video encoding :

  ffmpeg -y -re -i o.mov -vf subtitles=SUBS.srt -s 1920x1080 -r 25 -pixel_format yuv420p -aspect 16:9 -top 1 -qp 0 -c:v libx264 -b:v 600000 -minrate 600000 -maxrate 600000 -x264opts bitrate=6000:vbv-maxrate=6000:vbv-bufsize=400:ratetol=400:bitrate=6000:vbv-init=800:force-cfr=1 -g 33 -bf 3 -muxrate 6.5M -flags cgop+ilme+ildct -c:a mp2 -ac 2 -ar 48k -b:a 192k -f mpegts out.mpeg

  The current speed I’m getting is : speed = 1x.

  How can I force my CPU to work at full speed ?

• Why do i get avc1.000000 ? (FFMPEG, H.264 Video Encoding, C++)

  17 février 2020, par elastoss

  I have a bunch of bitmaps, and need to make them encoded in h.264 in fragmented .mp4.
  I’m using C++.
  What could cause that my AVC Profile is set to 0, SPS[], PPS[] and codec string to avc1.000000 ?

  Output from the mp4info :

  File :

  minor version : 200
  compatible brand : iso6
  compatible brand : mp41
  fast start : yes

  Movie :

  duration : 0 ms
  time scale : 1000
  fragments : yes

  Found 1 Tracks

  Track 1 :
  flags : 3 ENABLED IN-MOVIE
  id : 1
  type : Video
  duration : 0 ms
  language : und

  media :

  sample count : 0
  timescale : 90000
  duration : 0 (media timescale units)
  duration : 0 (ms)
  bitrate (computed) : 412.672 Kbps
  sample count with fragments : 35
  duration with fragments : 540000
  duration with fragments : 6000 (ms)

  display width : 1280.000000
  display height : 720.000000

  Sample Description 0

  Coding : avc1 (H.264)
  Width:n 1280
  Height : 720
  Depth : 24
  AVC Profile : 0
  AVC Profile Compat : 0
  AVC Level : 0
  AVC NALU Length Size : 0
  AVC SPS : []
  AVC PPS : []
  Codecs String : avc1.000000

  I’m using things like

  if (stream->codecpar->codec_id == AVCodecID.AV_CODEC_ID_H264)
  
  {
  
      err = ffmpeg.av_opt_set(cctx->priv_data, "preset", "ultrafast", 0);
  
      err = ffmpeg.av_opt_set(cctx->priv_data, "tune", "zerolatency", 0);
  
      err = ffmpeg.av_opt_set(cctx->priv_data, "profile", "high", 0);
  
  } 
  
  
  
  ...
  
  
  
  AVDictionary* opts = null;
  
  ffmpeg.av_dict_set(&opts, "movflags", "default_base_moof+frag_keyframe+empty_moov", 0); 
  
  
  
  ...
  
  
  
  AVPacket* pPacket = ffmpeg.av_packet_alloc();
  
  try
  
  {
  
      int error;
  
      do
  
      {
  
          ffmpeg.avcodec_send_frame(cctx, &convertedFrame).ThrowExceptionIfError();
  
  
  
          error = ffmpeg.avcodec_receive_packet(cctx, pPacket);
  
      } while (error == ffmpeg.AVERROR(ffmpeg.EAGAIN));
  
  
  
      error.ThrowExceptionIfError();
  
  
  
  }
  
  finally
  
  {
  
      ffmpeg.av_packet_rescale_ts(pPacket, cctx->time_base, stream->time_base);
  
      pPacket->stream_index = stream->index;
  
  
  
      ffmpeg.av_interleaved_write_frame(ofctx, pPacket);
  
      ffmpeg.av_packet_unref(pPacket);
  
  }

  What am I missing ? I’m using examples from internet. Thought that if AVFrame is encoded (send_frame) with H264 with profiles and presets and received as AVPacket. It should be done automatically.

  This is my first post, please be nice. Thanks in advance for helping.