diff --git a/asciidoc/mediawiki.conf b/asciidoc/mediawiki.conf
index 98b182f..201b081 100644
--- a/asciidoc/mediawiki.conf
+++ b/asciidoc/mediawiki.conf
@@ -82,7 +82,7 @@ latexmath-style=template="latexmathblock",subs=()
 <a class="image" href="{link}">
 {data-uri%}<img src="{imagesdir=}{imagesdir?/}{target}" alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}{title? title="{title}"}>
 {data-uri#}<img alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}{title? title="{title}"}
-{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print 'src=\"data:'+mimetypes.guess_type(r'{target}')[0]+';base64,'; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
+{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print('src=\x22data:' + mimetypes.guess_type(r'{target}')[0] + ';base64,'); base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
 {link#}</a>
 </span>
 
@@ -92,7 +92,7 @@ latexmath-style=template="latexmathblock",subs=()
 <a class="image" href="{link}">
 {data-uri%}<img src="{imagesdir=}{imagesdir?/}{target}" alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}>
 {data-uri#}<img alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}
-{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print 'src=\"data:'+mimetypes.guess_type(r'{target}')[0]+';base64,'; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
+{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print('src=\x22data:' + mimetypes.guess_type(r'{target}')[0] + ';base64,'); base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
 {link#}</a>
 </div>
 <div class="title">{caption={figure-caption} {counter:figure-number}. }{title}</div>
@@ -151,7 +151,7 @@ ifndef::data-uri[]
 endif::data-uri[]
 ifdef::data-uri[]
 <img alt="{index}" src="data:image/png;base64,
-{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{index}.png}")}"}">
+{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{index}.png}")}"}">
 endif::data-uri[]
 endif::icons[]
 
@@ -214,7 +214,7 @@ ifndef::data-uri[]
 item=<tr><td><img src="{iconsdir}/callouts/{listindex}.png" alt="{listindex}"></td><td>|</td></tr>
 endif::data-uri[]
 ifdef::data-uri[]
-item=<tr><td><img alt="{listindex}" src="data:image/png;base64, {sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{listindex}.png}")}"}"></td><td>|</td></tr>
+item=<tr><td><img alt="{listindex}" src="data:image/png;base64, {sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{listindex}.png}")}"}"></td><td>|</td></tr>
 endif::data-uri[]
 text=|
 endif::icons[]
@@ -387,7 +387,7 @@ template::[quoteblock]
 <td class="icon">
 {data-uri%}{icons#}<img src="{icon={iconsdir}/{name}.png}" alt="{caption}">
 {data-uri#}{icons#}<img alt="{caption}" src="data:image/png;base64,
-{data-uri#}{icons#}{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/{name}.png}")}"}">
+{data-uri#}{icons#}{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/{name}.png}")}"}">
 {icons%}<div class="title">{caption}</div>
 </td>
 <td class="content">
diff --git a/asciidoc/pve-html.conf b/asciidoc/pve-html.conf
index 5ab506f..8a089d3 100644
--- a/asciidoc/pve-html.conf
+++ b/asciidoc/pve-html.conf
@@ -37,10 +37,10 @@ endif::asciidoc7compatible[]
 
 [blockdef-pass]
 asciimath-style=template="asciimathblock",subs=()
-latexmath-style=template="latexmathblock",subs=()
+latexmath-style=template="latexmathblock",subs=(),posattrs=(),filter="unwraplatex.py"
 
 [macros]
-(?u)^(?P<name>audio|video)::(?P<target>\S*?)(\[(?P<attrlist>.*?)\])$=#
+^(?P<name>audio|video)::(?P<target>\S*?)(\[(?P<attrlist>.*?)\])$=#
 # math macros.
 # Special characters are escaped in HTML math markup.
 (?su)[\\]?(?P<name>asciimath|latexmath):(?P<subslist>\S*?)\[(?P<passtext>.*?)(?<!\\)\]=[specialcharacters]
@@ -85,7 +85,7 @@ latexmath-style=template="latexmathblock",subs=()
 <a class="image" href="{link}">
 {data-uri%}<img src="{imagesdir=}{imagesdir?/}{target}" alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}{title? title="{title}"}>
 {data-uri#}<img alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}{title? title="{title}"}
-{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print 'src=\"data:'+mimetypes.guess_type(r'{target}')[0]+';base64,'; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
+{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print('src=\x22data:' + mimetypes.guess_type(r'{target}')[0] + ';base64,'); base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
 {link#}</a>
 </span>
 
@@ -95,7 +95,7 @@ latexmath-style=template="latexmathblock",subs=()
 <a class="image" href="{link}">
 {data-uri%}<img src="{imagesdir=}{imagesdir?/}{target}" alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}>
 {data-uri#}<img alt="{alt={target}}"{width? width="{width}"}{height? height="{height}"}
-{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print 'src=\"data:'+mimetypes.guess_type(r'{target}')[0]+';base64,'; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
+{data-uri#}{sys:"{python}" -u -c "import mimetypes,base64,sys; print('src=\x22data:' + mimetypes.guess_type(r'{target}')[0] + ';base64,'); base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{imagesdir=}",r"{target}")}"}">
 {link#}</a>
 </div>
 <div class="title">{caption={figure-caption} {counter:figure-number}. }{title}</div>
@@ -154,7 +154,7 @@ ifndef::data-uri[]
 endif::data-uri[]
 ifdef::data-uri[]
 <img alt="{index}" src="data:image/png;base64,
-{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{index}.png}")}"}">
+{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{index}.png}")}"}">
 endif::data-uri[]
 endif::icons[]
 
@@ -217,7 +217,7 @@ ifndef::data-uri[]
 item=<tr><td><img src="{iconsdir}/callouts/{listindex}.png" alt="{listindex}"></td><td>|</td></tr>
 endif::data-uri[]
 ifdef::data-uri[]
-item=<tr><td><img alt="{listindex}" src="data:image/png;base64, {sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{listindex}.png}")}"}"></td><td>|</td></tr>
+item=<tr><td><img alt="{listindex}" src="data:image/png;base64, {sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/callouts/{listindex}.png}")}"}"></td><td>|</td></tr>
 endif::data-uri[]
 text=|
 endif::icons[]
@@ -389,7 +389,7 @@ template::[quoteblock]
 <td class="icon">
 {data-uri%}{icons#}<img src="{icon={iconsdir}/{name}.png}" alt="{caption}">
 {data-uri#}{icons#}<img alt="{caption}" src="data:image/png;base64,
-{data-uri#}{icons#}{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin,sys.stdout)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/{name}.png}")}"}">
+{data-uri#}{icons#}{sys:"{python}" -u -c "import base64,sys; base64.encode(sys.stdin.buffer,sys.stdout.buffer)" < "{eval:os.path.join(r"{indir={outdir}}",r"{icon={iconsdir}/{name}.png}")}"}">
 {icons%}<div class="title">{caption}</div>
 </td>
 <td class="content">