Sur d’autres sites (5978)

• Using gcovr with FFmpeg

  6 septembre 2010, par Multimedia Mike — FATE Server

  When I started investigating code coverage tools to analyze FFmpeg, I knew there had to be an easier way to do what I was trying to do (obtain code coverage statistics on a macro level for the entire project). I was hoping there was a way to ask the GNU gcov tool to do this directly. John K informed me in the comments of a tool called gcovr. Like my tool from the previous post, gcovr is a Python script that aggregates data collected by gcov. gcovr proves to be a little more competent than my tool.

  Results
  Here is the spreadsheet of results, reflecting FATE code coverage as of this writing. All FFmpeg source files are on the same sheet this time, including header files, sorted by percent covered (ascending), then total lines (descending).

  Methodology
  I wasn’t easily able to work with the default output from the gcovr tool. So I modified it into a tool called gcovr-csv which creates data that spreadsheets can digest more easily.

  • Build FFmpeg using the '-fprofile-arcs -ftest-coverage' in both the extra cflags and extra ldflags configuration options
  • 'make'
  • 'make fate'
  • From build directory : 'gcovr-csv > output.csv'
  • Massage the data a bit, deleting information about system header files (assuming you don’t care how much of /usr/include/stdlib.h is covered — 66%, BTW)

  Leftovers
  I became aware of some spreadsheet limitations thanks to this tool :

  1. OpenOffice can’t process percent values correctly– it imports the percent data from the CSV file but sorts it alphabetically rather than numerically.
  2. Google Spreadsheet expects CSV to really be comma-delimited– forget about any other delimiters. Also, line length is an issue which is why I needed my tool to omit the uncovered ine number ranges, which it does in its default state.

• Anomalie #3014 : Chaines de langue de "Forums" utilisées dans la "dist"

  24 décembre 2017, par b b

  Pour info, voici les occurrences de chaînes de langue de forum dans la dist à ce jour :

  grep -nHIirF —exclude=*.svn-base — :forum : .
  ./404.html:36 :            [(#ENVfond_erreur|==forum|oui)
  
  <:forum:aucun_message_forum :>
  
  ]
  
  ./article.html:56 :            [
  <:forum:form_pet_message_commentaire :>
  ./inclure/forum.html:17 :                [(#CONFIGforums_titre| !=non|oui)#COMPTEUR_BOUCLE.
  
  ./inclure/forum.html:42 :                        [(#CONFIGforums_titre| !=non|oui)#COMPTEUR_BOUCLE.
  
  ./forum.html:11 :    
  
  ./forum.html:25 :
  
  <:accueil_site :> &gt ; ... &gt ; <:forum:forum :> #ID_FORUM
  
  ./forum.html:28 :                [
  (#TITRE|sinon<:forum:forum :> #ID_FORUM)
  ]
  
  ./forum.html:38 :
  <:forum:forum_avez_selectionne :> #TITRE
  
  ./forum.html:41 :            [
  <:forum:form_pet_message_commentaire :>
  ./breve.html:43 :            [
  <:forum:form_pet_message_commentaire :>
  
  

• FFMPEG width not divisible by 2 (639x360)

  5 octobre 2020, par yasgur99

  I am using python wrapper command of ffmepeg. I followed the tutorial from here for a "Production ready HLS" : https://docs.peer5.com/guides/production-ready-hls-vod/

  


  This is my code :

  


   subprocess.call(['ffmpeg', '-y', '-i', download_path,
                     '-vf', 'scale=w=640:h=360:force_original_aspect_ratio=decrease', \
                     '-c:a', 'aac', '-ar', '48000', '-c:v', 'h264', \
                     '-profile:v', 'main', '-crf', '20', '-sc_threshold', '0', \
                     '-g', '48', '-keyint_min', '48', '-hls_time', '4', \
                     '-hls_playlist_type', 'vod',  '-b:v', '800k', \
                     '-maxrate', '856k', '-bufsize', '1200k', '-b:a', '96k', \
                     '-hls_segment_filename', upload_path + \
                     '/360p_%03d.ts', upload_path + '/360p.m3u8', \
                     '-vf', 'scale=w=842:h=480:force_original_aspect_ratio=decrease', \
                     '-c:a', 'aac', '-ar', '48000', '-c:v', 'h264', \
                     '-profile:v', 'main', '-crf', '20', '-sc_threshold', '0', \
                     '-g', '48', '-keyint_min', '48', '-hls_time', '4', \
                     '-hls_playlist_type', 'vod', '-b:v', '1400k', \
                     '-maxrate', '1498k', '-bufsize', '2100k', '-b:a', '128k', \
                     '-hls_segment_filename', upload_path + \
                     '/480p_%03d.ts', upload_path + '/480p.m3u8', \
                     '-vf', 'scale=w=1280:h=720:force_original_aspect_ratio=decrease', \
                     '-c:a', 'aac', '-ar', '48000', '-c:v', 'h264', \
                     '-profile:v', 'main', '-crf', '20', '-sc_threshold', '0', \
                     '-g', '48', '-keyint_min', '48', '-hls_time', '4', \
                     '-hls_playlist_type', 'vod', '-b:v', '2800k', \
                     '-maxrate', '2996k', '-bufsize', '4200k', '-b:a', '128k', \
                     '-hls_segment_filename', upload_path + \
                     '/720p_%03d.ts', upload_path + '/720p.m3u8', \
                     '-vf', 'scale=w=1920:h=1080:force_original_aspect_ratio=decrease', \
                     '-c:a', 'aac', '-ar', '48000', '-c:v', 'h264', \
                     '-profile:v', 'main', '-crf', '20', '-sc_threshold', '0', \
                     '-g', '48', '-keyint_min', '48', '-hls_time', '4', \
                     '-hls_playlist_type', 'vod', '-b:v', '5000k', \
                     '-maxrate', '5350k', '-bufsize', '7500k', '-b:a', '192k', \
                     '-hls_segment_filename', upload_path + '/1080p_%03d.ts', upload_path + '/1080p.m3u8'])


  


  And getting this output

  


  [libx264 @ 0x7fb95500c800] width not divisible by 2 (639x360)
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height


  


  Any ideas of whats going wrong ?