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• Anomalie #3299 : Génération d’urls en boucle avec noms d’objets longs

  16 octobre 2014, par Guillaume Fahrner

  Je pense que c’est plus un soucis d’implémentation qu’autre chose. J’ai réglé mon problème de la manière suivante :

  1) implémenter le pipeline objet_compte_enfants pour l’objet concerné, dans mon cas

  /**
   * Compte intégrant les challenge dans le nombre d’objet d’une rubrique
   */
  function ctf_alltheday_objet_compte_enfants($flux) 
      if ($flux[’args’][’objet’] == ’rubrique’)
  
              $flux[’data’][’machines_virtuelles’] = sql_countsel(
  
                      ’spip_machines_virtuelles’,
  
                      array(
  
                              ’id_rubrique = ’.intval($flux[’args’][’id_objet’])
  
                      )
  
              ) ;
  
      
  
      return $flux ;
  
  
  

  2) ajouter la configuration adéquate a la configuration des URLs choisi, dans mon cas :
  

  $GLOBALS[’url_arbo_parents’]=array(’challenge’=>array(’id_rubrique’,’rubrique’)) ;
  
  $GLOBALS[’url_arbo_types’]=array_merge($GLOBALS[’url_arbo_types’], array(’challenge’=>’’, ’solution’=>’’)) ;
  

  Une fois la "configuration" mise en place correctement : plus aucun soucis ,-)

• Is 32-bit-only app running on iPhone 6 slower then on iPhone 5 ?

  22 avril 2015, par ChihHao

  I have an app that is build with very old ffmpeg library(Ver. 0.10.4). I found that when iPhone 5 decoding the H.264 stream with VGA resolution, the used percentage of CPU is about 10% lower then iPhone 6’s.

  The ffmpeg lib file only support arm V7 and arm V7s architecture. So I think that the function provided by ffmpeg will run faster or more efficency on the machine with the supported architecture. Is that right ?

• Merging videos. multiple overlays and audio in one step

  3 février 2019, par user14567

  I have a process that I run hourly to update a 60 sec weather video.

  I combine a background video with a generated m4a audio track, scrolling text and separate top and bottom overlays.

  I need all of this in an mp4 and in a TLS (m3u8) format.

  Right now I do this 3 ffmpeg consecutive sessions and end up with a rendered 720p mp4.

  Then I run a 4th ffpmeg session to convert the the mp4 to a TLS version (I need both mp4 and m3u8.)

  I am doing this in 4 ffmpeg runs because I haven’t figured out how to combine the filters and do it in less.

  When I try an combine this, I lose either the overlays or the text. I can’t get it all to come out in one session. I’ve tried comma separating within the filters but I haven’t found the right combination.

  Any assistance in showing me how to combine this work and reduce the number of runs would be greatly appreciated.

  This runs on a Centos 7 box with ffmpeg version 3.4.1.

  #
  
  # Step 1: Combine background video with audio and scrolling text
  
  #
  
  ffmpeg -i /video/weather/media/sunnybeach.mp4 \
  
  -i /video/weather/prod/currentweather.m4a \
  
  -i /video/weather/media/weather-lower-third1.png \
  
  -map 2:v:0 -map 1:a:0 -strict -2 \
  
  -filter_complex  "[0]split[txt][orig];[txt]drawtext=fontfile=/var/www/vhosts/30a.tv/httpdocs/openx/lib/pear/Image/Canvas/Fonts/arial.ttf:fontsize=80:fontcolor=white:x=(w-text_w)/2+20:y=h-70*t:textfile=/video/weather/prod/currentweather.txt:bordercolor=black:borderw=2[txt];[orig]crop=iw:50:0:0[orig];[txt][orig]overlay” \
  
  -t 60 -c:v libx264 -y -s hd720  -loglevel quiet /video/weather/prod/currentweather.mp4 2>&1 >> /dev/null
  
  
  
  if [ $? != 0 ]; then echo fail step 1; exit 1;fi
  
  
  
  #
  
  # Step 2: now overlay current lowerthird
  
  #
  
  ffmpeg -i /video/weather/prod/currentweather.mp4 \
  
  -i /video/weather/media/weather-lower-third1.png \
  
  -strict -2 -filter_complex  "[0:v][1:v]overlay" -c:a copy -y  \
  
  -loglevel quiet $FKWI/currentweather1.mp4 2>&1 >> /dev/null
  
  
  
  if [ $? != 0 ]; then echo fail step 2; exit 1;fi
  
  
  
  #
  
  # Step 3: now overlay current topbanner
  
  #
  
  ffmpeg -i $FKWI/currentweather1.mp4 \
  
  -i /video/weather/media/weather-top-banner.png \
  
  -strict -2 -filter_complex  "[0:v][1:v]overlay" -c:a copy -y  \
  
  -loglevel quiet $FKWI/currentweather.mp4 2>&1 >> /dev/null
  
  
  
  if [ $? != 0 ]; then echo fail step 3; exit 1;fi
  
  
  
  #
  
  # Step 4: Now make TLS version
  
  #
  
  
  
  cd $FKWI/httpdocs/weather
  
  RES1=`/usr/bin/ffmpeg -i $FKWI/httpdocs/currentweather.mp4 \
  
  -profile:v baseline -level 3.0 -s 1280x720 \
  
  -c:a aac -ar 48000 -g 60 -start_number 0 \
  
  -hls_time 6 -hls_list_size 0 -f hls \
  
  -hls_base_url "http://$URL.com/weather/" \
  
  -hls_segment_filename "video%04d.ts" \
  
  -strict -2   -loglevel quiet "currentweather.m3u8" 2>&1>>/dev/null `
  
  
  
  if [ $? != 0 ]; then echo fail step 4; exit 1;fi

  This code yields both videos fine, but it takes 4 runs and I need it to happen in less runs.