Sorry, I apparently send wrong patch - 16 bit pngs were still broken. I scratched my head a lot (because it was working!) and realized I swapped order of calls! diff relative to commit 8c43913b9f18a3856bbff826aef96587a32f0470 diff --git a/cinelerra-5.1/cinelerra/filepng.C b/cinelerra-5.1/cinelerra/filepng.C index 4df95f1e..c2e1cf6c 100644 --- a/cinelerra-5.1/cinelerra/filepng.C +++ b/cinelerra-5.1/cinelerra/filepng.C @@ -229,9 +229,9 @@ int FilePNG::write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit) asset->png_use_alpha ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); // does not work (gg 2020/03/17 libpng16 fc31) + png_write_info(png_ptr, info_ptr); if( asset->png_depth == 16 && BC_Resources::little_endian ) png_set_swap(png_ptr); - png_write_info(png_ptr, info_ptr); png_write_image(png_ptr, output_frame->get_rows()); png_write_end(png_ptr, info_ptr); result = 0; this way it SHOULD work .... Tested! Also, hint for ccache: in .ccache/ccache.conf set for maximum compression compression = true compression_level = 8
