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• libx264 2 pass encoding with mbtree option, first pass fails

  25 août 2012, par lightdee

  I'm working on an application which uses libx264. When doing 2-pass encodes, if the mbtree option is enabled, the 1st pass doesn't seem to
  put anything into the stats files :

      x264_1345845358591.L.mbtree.temp (size of 0)
  
      x264_1345845358591.L.temp
  
  
  
      $ cat x264_1345845358591.L.temp 
  
      #options: 288x162 fps=2997/100 timebase=100/2997 bitdepth=8 cabac=0 ref=3 
  
      deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 
  
      mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 
  
      fast_pskip=1 chroma_qp_offset=-2 threads=48 sliced_threads=0 nr=0 
  
      decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 
  
      weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 
  
      rc=abr mbtree=1 bitrate=210 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 
  
      ip_ratio=1.40 aq=1:1.00**

  When I do x264_encoder_open() for the 2nd pass, I get the failure message :

      x264 [error]: ratecontrol_init: can't open stats file
  
      x264 [error]: x264_encoder_open failed

  So it seems to be failing in the first pass. 2pass works fine if I turn off mbtree. I can run it with presets or tune parameters as long as mbtree is turned off. What parameter (see above list) might make mbtree fail in the first pass ?

• libx264 2 pass encoding with mbtree option, first pass fails

  25 août 2012, par lightdee

  I'm working on an application which uses libx264. When doing 2-pass encodes, if the mbtree option is enabled, the 1st pass doesn't seem to
  put anything into the stats files :

      x264_1345845358591.L.mbtree.temp (size of 0)
  
      x264_1345845358591.L.temp
  
  
  
      $ cat x264_1345845358591.L.temp 
  
      #options: 288x162 fps=2997/100 timebase=100/2997 bitdepth=8 cabac=0 ref=3 
  
      deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 
  
      mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 
  
      fast_pskip=1 chroma_qp_offset=-2 threads=48 sliced_threads=0 nr=0 
  
      decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 
  
      weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 
  
      rc=abr mbtree=1 bitrate=210 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 
  
      ip_ratio=1.40 aq=1:1.00**

  When I do x264_encoder_open() for the 2nd pass, I get the failure message :

      x264 [error]: ratecontrol_init: can't open stats file
  
      x264 [error]: x264_encoder_open failed

  So it seems to be failing in the first pass. 2pass works fine if I turn off mbtree. I can run it with presets or tune parameters as long as mbtree is turned off. What parameter (see above list) might make mbtree fail in the first pass ?

• Noobs approach to automate x264 cmd

  16 novembre 2012, par nightcrawler

  so here is my script to loop through specific video extensions » add a manual profile » generate necessary *.bat & finally a final 'loader' batch file to execute previous *.bat files sequentially & necessary logging (this gives quiet a deal of freedom if you so want)

  ::==
  
  :: gets lines into vars c1 v2 v...
  
  @echo off
  
  :: user input required
  
  cd /d "d:\Trainers\out\"
  
  setLocal EnableDelayedExpansion
  
  dir /B /O:N | findstr ".wmv$ " >filename.txt
  
  echo. >log.txt
  
  :: user input required
  
  for /f "tokens=* delims= " %%a in ('type filename.txt ^|findstr ".wmv$"') do (
  
  set /a n+=1
  
  echo. >file!n!.bat
  
  set in=%in%%%a
  
  :: user input required
  
  set out=!in:.wmv=.mp4!
  
  :: user input required
  
  set v=x264 --crf 23  --level 3.1 --tune film -o "d:\Trainers\out\!in!" "d:\Trainers\out\!out!"
  
  echo. !v!>file!n!.bat
  
  )
  
  dir /B /O:N | findstr ".bat$ " >x264_home.txt
  
  for /f "tokens=* delims= " %%a in (x264_home.txt) do (
  
  set /a n+=1
  
  :: mtee is an external library Google it
  
  set "z=call %%a | mtee /d/c/t/+ log.txt"
  
  echo. !z! >> x264_home.bat
  
  )
  
  echo. @echo off > newFile.bat
  
  type x264_home.bat >> newFile.bat
  
  type newFile.bat > x264_home.bat
  
  del newFile.bat,x264_home.txt,filename.txt
  
  echo. pause >> x264_home.bat
  
  echo. @echo All Operation done... >> x264_home.bat
  
  :: user input required
  
  move "d:\Trainers\out\*.bat" "d:\Program Files\x264_auto\test\"
  
  :: user input required
  
  move "d:\Trainers\out\log.txt" "d:\Program Files\x264_auto\test\"
  
  ::==

  Now the above code which is fairly easy to understand (bcz its written by a noob) run perfectly & create necessary files. For instance one of the file1.bat looks like this :

  x264 --crf 23  --level 3.1 --tune film --preset veryslow --deblock -2:-1 --zones 24233,25324,q=20 --acodec aac --abitrate 80 -o "d:\Trainers\out\1.wmv" "d:\Trainers\out\1.mp4"

  ...& the loader .bat file looks like

   @echo off 
  
   call file1.bat | mtee /d/c/t/+ log.txt 
  
   call file2.bat | mtee /d/c/t/+ log.txt
  
   call file3.bat | mtee /d/c/t/+ log.txt
  
   @echo All Operation done... 

  You see this is a quiet flexible approach in that you can use special filestr » set another loop » set another profile. Furthermore every batch file can be latter edited especiialy when you heavily use --zone x264 feature
  I am successful because there is no error in any output ...but its the x264.exe (provider/compiler x264GUI) throws error which it otherwise don't ?

  d:\Program Files\x264_auto\test>x264 --crf 23  --level 3.1 --tune film --preset
  
  veryslow --deblock -2:-1 --zones 24233,25324,q=20 --acodec aac --abitrate 80 -o
  
  "d:\Trainers\out\1.wmv" "d:\Trainers\out\1.mp4"
  
  ffms [error]: could not create index
  
  lavf [error]: could not open input file
  
  raw [error]: raw input requires a resolution.
  
  x264 [error]: could not open input file `d:\Trainers\out\1.mp4' via any method!

  its the x264 thats the culprit perhaps a senior guide is required here