{"id":346,"date":"2010-05-18T09:03:59","date_gmt":"2010-05-18T09:03:59","guid":{"rendered":"http:\/\/esferas.org\/msqlu\/2010\/05\/18\/arreglando-imagenes-png\/"},"modified":"2010-05-18T09:03:59","modified_gmt":"2010-05-18T09:03:59","slug":"arreglando-imagenes-png","status":"publish","type":"post","link":"https:\/\/esferas.org\/msqlu\/2010\/05\/18\/arreglando-imagenes-png\/","title":{"rendered":"Arreglando im\u00e1genes PNG"},"content":{"rendered":"

A\u00fan no s\u00e9 qu\u00e9 provoca que las im\u00e1genes PNG que crea SnapShot est\u00e9n corruptas<\/a>, pero he descubierto c\u00f3mo arreglarlo.<\/p>\n

<\/p>\n

Buscando el tipo de error me he encontrado un registro en la p\u00e1gina oficial de las librer\u00edas PNG donde cuentan<\/a> que es posible que versiones antiguas de la librer\u00eda creen esta condici\u00f3n.<\/p>\n

Bueno, el caso es que he instalado el paquete pngcrush<\/a> porque en la rama estable de Debian no est\u00e1 lo bastante actualizado pngcheck<\/a> y no incluye la utilidad de reparaci\u00f3n directa. Se lo he pasado al pantallazo recibido por correo para arreglarlo:<\/p>\n

  1. $ pngcrush -fix  100518102247<\/span>.png arreglado.png<\/div><\/li>
  2.    Recompressing 100518102247<\/span>.png<\/div><\/li>
  3.    Total length of data found in<\/span> IDAT chunks    =    53806<\/span><\/div><\/li>
  4. unknown chunk handling done<\/span>.<\/div><\/li>
  5.    IDAT length with method   1<\/span> (<\/span>fm 0<\/span> zl 4<\/span> zs 0<\/span>)<\/span> =    49637<\/span><\/div><\/li>
  6.    IDAT length with method   2<\/span> (<\/span>fm 1<\/span> zl 4<\/span> zs 0<\/span>)<\/span> =    53076<\/span><\/div><\/li>
  7.    IDAT length with method   3<\/span> (<\/span>fm 5<\/span> zl 4<\/span> zs 1<\/span>)<\/span> =    53147<\/span><\/div><\/li>
  8.    IDAT length with method   4<\/span> (<\/span>fm 0<\/span> zl 9<\/span> zs 1<\/span>)<\/span> =    45422<\/span><\/div><\/li>
  9.    IDAT length with method   7<\/span> (<\/span>fm 0<\/span> zl 9<\/span> zs 0<\/span>)<\/span> =    42911<\/span><\/div><\/li>
  10.    Best pngcrush method = 7<\/span> (<\/span>fm 0<\/span> zl 9<\/span> zs 0<\/span>)<\/span> for<\/span> arreglado.png<\/div><\/li>
  11.      (<\/span>20.25<\/span>%<\/span> IDAT reduction)<\/span><\/div><\/li>
  12.      (<\/span>20.23<\/span>%<\/span> filesize reduction)<\/span><\/div><\/li>
  13.  <\/div><\/li>
  14.    CPU time<\/span> used = 0.430<\/span> seconds (<\/span>decoding 0.010<\/span>,<\/div><\/li>
  15.           encoding 0.400<\/span>, other 0.020<\/span> seconds)<\/span><\/div><\/li><\/ol><\/pre>\n
    … y todo bien y todos felices.<\/p>\n","protected":false},"excerpt":{"rendered":"
    A\u00fan no s\u00e9 qu\u00e9 provoca que las im\u00e1genes PNG que crea SnapShot est\u00e9n corruptas, pero he descubierto c\u00f3mo arreglarlo.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","webmentions_disabled_pings":false,"webmentions_disabled":false,"footnotes":""},"categories":[2],"tags":[268],"class_list":["post-346","post","type-post","status-publish","format-standard","hentry","category-software","tag-png"],"_links":{"self":[{"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/posts\/346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/comments?post=346"}],"version-history":[{"count":0,"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/posts\/346\/revisions"}],"wp:attachment":[{"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/media?parent=346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/categories?post=346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/esferas.org\/msqlu\/wp-json\/wp\/v2\/tags?post=346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}