increase stack size to 5 MB

fixes #591 and #775

Author: Christopher Beppler

build/ffmpeg-wasm.sh

@@ -33,6 +33,7 @@ CONF_FLAGS=(
   -sENVIRONMENT=worker
   -sWASM_BIGINT                            # enable big int support
   -sUSE_SDL=2                              # use emscripten SDL2 lib port
+  -sSTACK_SIZE=5MB                         # increase stack size to support libopus
   -sMODULARIZE                             # modularized to use as a library
   ${FFMPEG_MT:+ -sINITIAL_MEMORY=1024MB}   # ALLOW_MEMORY_GROWTH is not recommended when using threads, thus we use a large initial memory
   ${FFMPEG_MT:+ -sPTHREAD_POOL_SIZE=32}    # use 32 threads