Apply zstd compression after PNG-like filtering process.
Full HD Realtime encoding in lossless format (RGBA) is fast enough on M1 MacBook Air.
Support only co64 atom.
Note: File size limit is 4294967295bytes.
#import "zstd.h"
#import "Filter.h"
#import "QTZPNG.h"
Filter::Encoder *encoder = new Filter::Encoder(w,h,Filter::Color::RGBA);
encoder->encode(src,Filter::Color::RGBA,Filter::Type::Sub);
size_t len = ZSTD_compress(dst,(w+1)*h*encoder->bpp(),encoder->bytes(),encoder->length(),1);
QTZPNGRecorder *recorder = new QTZPNGRecorder(w,h,30,@"./zpng.mov");
recorder->add((unsigned char *)dst,len);
recorder->save();
QTZPNGParser *parser = new QTZPNGParser(@"./zpng.mov");
NSData *zpng = parser->get(0);
ZSTD_decompress(src,w*h*Filter::Color::RGBA+h,[zpng bytes],[zpng length]);
Filter::Decoder *decoder = new Filter::Decoder(w,h,Filter::RGBA);
decoder->decode(src,Filter::Color::ARGB);
Any library is required to convert to PNG.
Using stb_image_write as example.
QTZPNGParser *parser = new QTZPNGParser(@"./zpng.mov");
unsigned int bpp = parser->depth()>>3;
NSData *zpng = parser->get(0);
ZSTD_decompress(src,(w*h)*bpp+h,[zpng bytes],[zpng length]);
Filter::Decoder *decoder = new Filter::Decoder(w,h,bpp);
decoder->decode((unsigned char *)src,bpp);
int len = 0;
unsigned char *png = stbi_write_png_to_mem((const unsigned char *)decoder->bytes(),w*bpp,w,h,bpp,&len);
QTPNGRecorder *recorder = new QTPNGRecorder(w,h,30,bpp<<3,@"./png.mov");
recorder->add(png,len);
recorder->save();
Support for decoding via emscripten.
https://github.com/mizt/zpng/tree/master/emscripten/
File Extension is zpng.
https://github.com/mizt/zpng/tree/master/QuickLook/
mdls test.zpng
Copy kMDItemContentType value to QLSupportedContentTypes in Info.plist
/Library/Application\ Support/Adobe/Common/Plug-ins/7.0/MediaCore/zpng_File_Import.bundle
See aloso https://github.com/fnordware/AdobeOgg/tree/theora/
Directly import in After Effects via Premiere Pro Importer.
https://github.com/mizt/zpng/tree/master/premiere/
File Extension is zpng.
char formatname[255] = "zpng";
char shortname[32] = "zpng";
char platformXten[256] = "zpng\0";
resource 'IMPT' (1000)
{
0x7A706E67 // 'zpng'
};
Add jit.zpng to Bundle Identifier.
Full HD Realtime encoding is available by setting Sub filter only. https://github.com/mizt/zpng/blob/master/FastEncoder.h
-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk option is required for make.
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