Hello,
\pdfextension obj stream file {...}
stopped working in ConTeXt (TeXLive-2020). Here is a minimal example:
\starttext
test \immediate\pdfextension obj stream file {duck.mp3}
\stoptext
It produces an error:
mtx-context | fatal error: return code: 256
...4a3076dc514ba966a1fac9/formats/luatex/lpdf-ini-macro.lua:892: pdf.obj(): no
"string" or "file" given
1 \starttext
2 >> test \immediate\pdfextension obj stream file {duck.mp3}
3 \stoptext
mtx-context | fatal error: return code: 256
On the other hand, the LuaTeX versions compiles:
test \immediate\pdfextension obj stream file {duck.mp3}
\bye
Kind regards, Alexander
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