Newest 'x264' Questions - Stack Overflow

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• How to encode multiple files with a batch file

  11 juillet 2021, par Black Butterfly

  I am Encoding my own anime videos to save some space on my HDD using this script

  https://gist.github.com/ScarletDevil25/9d71e4a7f5c215e558ecad158aa52600

  However I can only encode one video at a time by dragging said video to the batch file and allowing it to run.

  What I would like to be able to do is have the batch file encode multiple videos at once.

  also as another question if someone could tell me how I would run this as admin

• x264_encoder_open always return null

  10 juillet 2021, par chinayin

  this is my code

  x264_param_default(&m_X264Param) ;

  nRet = x264_param_default_preset(&m_X264Param,"medium","zerolatency") ;
  if (nRet)
  {
      return -1;
  }
  if (cpMain == Param.nProfile)
  {
      nRet = x264_param_apply_profile(&m_X264Param,"main") ;
  }
  else if (cpSimple == Param.nProfile)
  {
      nRet = x264_param_apply_profile(&m_X264Param,"baseline") ;
  }
  else if (cpComplex == Param.nProfile)
  {
      nRet = x264_param_apply_profile(&m_X264Param,"high");
  }
  if (nRet)
  {
      return -1;
  }
  m_X264Param.i_width = Param.nWidth ;
  m_X264Param.i_height = Param.nHeight ;
  m_X264Param.i_threads = X264_THREADS_AUTO ;
  m_X264Param.i_log_level = X264_LOG_NONE ;
  m_X264Param.rc.i_bitrate = Param.nBitRate ;
  m_X264Param.rc.i_rc_method = X264_RC_ABR ;
  m_X264Param.i_csp          =  X264_CSP_I420 ;
  

  m_pX264Handle = x264_encoder_open(&m_X264Param) ;

  but it always return null it is my first time use it did i miss some key param? is anyone who can tell me the answer! thank you very much and best regards

• Why does x264 keep giving me "command not found" error on my Mac ? [closed]

  2 juillet 2021, par hd-dvd

  I just installed x264 via Homebrew on my Mac running MacOS 11.4 Big Sur. I'm trying to encode a video but I can't get x264 to run properly.

  This is the command I am running in the Terminal:

  x264 --bitrate 25000 --preset veryslow --bluray-compat --tune film --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 30 --open-gop --slices 4 --fake-interlaced --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 1 -o out.264 in.mp4

  and this is what it outputs:

  bash: x264 --bitrate 25000 --preset veryslow: command not found

  If I delete the --preset part then it just gets hung up on some other part, like --tune.

  I have tried brew doctor and there are no errors.

  If I just run x264 then it gives me x264 [error]: No input file. Run x264 --help for a list of options. so it seems as if x264 is installed. I don't know where to begin troubleshooting this but I'd like to get it to work.

  If I simplify the command way down to x264 -o out.264 in.mp4 then I get:

  avs [error]: failed to load avisynth
  raw [error]: raw input requires a resolution.
  x264 [error]: could not open input file `in.mp4' via any method!
  

  I would greatly appreciate some pointers on how to get this working.

• ffmpeg 2 pass encoding- understand the statistics in the output .log file

  21 juin 2021, par Yaelvi

  I am using 2 pass encoder to encode my input video with a target bitrate. I want to get the encoder (x264) statistics from the first pass- these statistics are written to ffmpeg2pass.log the output for each frame looks like that:

  in:2 out:2 type:B dur:2 cpbdur:2 q:28.41 aq:25.07 tex:4721 mv:2357 misc:2266 imb:24 pmb:527 smb:3049 d:- ref:0 ;

  How can I found is the meaning of each value? (for example, mv is motion vectors, but what is the meaning of misc, imb, pmb etc.?)

  ffmpeg command used: ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" -c:v libx264 -pass 1 -stats -vstats -passlogfile "log_file_prefix" -f mp4 -y "output.mp4" && ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" -c:v libx264 -pass 2 -passlogfile "log_file_prefix" -y "output.mp4"

• What are VP9 Codec settings comparable to x264 encoder with preset=ultrafast setting regarding CPU ?

  11 juin 2021, par xKubo

  I'd like to replace the x264 codec [codec settings: preset=ultrafast] with the vp9 codec. My primary requirement is that the encoding has less or approximately equal CPU, while keeping the quality of the video roughly the same. I tried the following settings, however my CPU is still roughly 30% higher.

  VP9 codec settings: crf=30;quality=realtime;speed=15;lag-in-frames=7

  x264 codec settings: preset=ultrafast;

  Is there any codec setting that can lower my CPU during encoding even more?

  I am constrained to only a single thread. Screenshot of my simple testing app