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Sat, 02 Aug 2025 17:07:11 +0200 (CEST) Subject: Re: [FFmpeg-devel] Again pre-multiplied alpha X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: TmlrbGFzIEhhYXMgKEhFMTIwMjUtMDgtMDIpOgo+IEkgZG9uJ3QgdGhpbmsgeW91IHVuZGVyc3Rh bmQgdGhlIHByb2JsZW0gaGVyZS4KCuKApiBzYXlzIHNvbWVib2R5IHdobyBoYXMgbWlzdW5kZXJz dG9vZCB3aGF0IEkgd2FzIHN1Z2dlc3RpbmcgdHdpY2UgaW4gYQpyb3cuCgo+IFN1Y2ggYSBmbGFn IHdvdWxkIGFjY29tcGxpc2gKPiBub3RoaW5nLCBzaW5jZSB0aGVyZSBhcmUgbm8gZmlsdGVycyB0 aGF0IHdvdWxkIGFjdHVhbGx5IHNldCBpdC4KClllcywgeW91ciBqb2IgaW52b2x2ZXMgc2V0dGlu ZyB0aGlzIGZsYWdzIG9uIGZpbHRlcnMgeW91IGtub3cgd2lsbCBub3QKY29ycnVwdCBvdXRwdXQg d2hlbiBzdWJqZWN0ZWQgdG8gcHJlbXVsdGlwbGllZCBhbHBoYS4KCj4gV2hhdCB5b3UgYXJlIGRv aW5nIGFtb3VudHMgdG8gbGV0dGluZyBwZXJmZWN0IGJlIHRoZSBlbmVteSBvZiBnb29kLgoKTm8s IHRoYXQgd291bGQgYmUgcmVxdWlyZSByZWFsIG5lZ290aWF0aW9uLgoKV2hhdCBJIGFtIGFza2lu ZyBpcyBjYWxsZWQgYSBjb21wcm9taXNlOiBJIGRlbWFuZCBsZXNzIHRoYW4gSSB3b3VsZCB3YW50 CmJ1dCBtb3JlIHRoYW4gd2hhdCB5b3UgYXJlIG9mZmVyaW5nLgoKQW5kIEkgZG8gbm90IHRoaW5r IHRoYXQgYWRkaW5nIGEgZmxhZyBpcyB0b28gbXVjaCB0byBhc2suCgo+CQkJCQkJCQlJIGRvbid0 Cj4gc2VlIGFueXRoaW5nICJzbG9wcHkiIGluIG15IGNvbW1pdHM7IHRoZXkgYXJlIGludHJvZHVj aW5nIGEgd2VsbC1zY29wZWQgZmVhdHVyZQo+IHdpdGggd2VsbC1kZWZpbmVkIHNlbWFudGljcyB0 aGF0IGNvcnJlc3BvbmQgdG8gdXNlciBleHBlY3RhdGlvbiwgYW5kIHlvdQo+IGFyZSBlc3NlbnRp YWxseSBibG9ja2luZyBpdCBiZWNhdXNlIHlvdSB3YW50IGl0IHRvIGRvIG1vcmUgdGhhbiBpdCBk b2VzPwoKSXQgaXMgbm90IHRydWUgdGhhdCBpdCBjb3JyZXNwb25kcyB0byB1c2VyIGV4cGVjdGF0 aW9uLiBRdWl0ZSB0aGUKb3Bwb3NpdGUsIGl0IGluY3JlYXNlcyB0aGUgcmlzayBvZiB1c2VyIGNv cnJ1cHRpbmcgdGhlaXIgZGF0YS4KCj4gV291bGQgaXQgYmUgbmljZSBpZiBsaWJhdmZpbHRlciBj b3VsZCBuZWdvdGlhdGUgYWxsIEFWRnJhbWUgcHJvcGVydGllcz8gWWVzLgo+IElzIHRoYXQgYSBy ZWFzb25hYmxlIHJlcXVpcmVtZW50IGZvciBhZGRpbmcgbmV3IEFWRnJhbWUgZmllbGQ/IE5vLgoK Rm9yIHRoZSB0aGlyZCB0aW1lLCBpdCBpcyBub3Qgd2hhdCBJIGFtIGFza2luZyB5b3UgdG8uIFNv IHBsZWFzZSByZWZyYWluCmZyb20gYnVybmluZyB0aGF0IHN0cmF3IG1hbiBhIGZvdXJ0aCB0aW1l LgoKPiBMYXN0IHRpbWUgSSBjaGVja2VkLCB5b3UgZG8gbm90IHBheSBtZSB0byBpbXBsZW1lbnQg eW91ciBkZXNpcmVzLCBzbyB3aHkKPiBzaG91bGQgSSBpbnZlc3QgdW5kdWUgZWZmb3J0IGltcGxl bWVudCB5b3VyIGZlYXR1cmUgcmVxdWVzdHM/CgpMYXN0IHRpbWUgSSBjaGVja2VkLCB3ZSBhcmUg YWxsIHZvbHVudGVlcnMuCgpNeSBwdXJwb3NlIGlzIHRvIGtlZXAgdGhlIGNvZGUgYW5kIGJlaGF2 aW9yIGFzIGdvb2QgYXMgcG9zc2libGUuCgpZb3VycyBpc+KApj8gSSBkbyBub3Qga25vdz8gU2Nv cmUgYSBmZXcgY29tbWl0cz8gR2V0IGEgZmVhdHVyZSBpbiBxdWlja2x5CmJlY2F1c2UgeW91IG5l ZWQgaXQgaW4gYW5vdGhlciBwcm9qZWN0PwoKPiBCdXQgYWxzbyBhY2NvcmRpbmcgdG8geW91LCBp dCBpcyBhbiAib2JzY3VyZSBleHBlcnQtbGV2ZWwgZmVhdHVyZSI7IHNvCj4gd2hpY2ggaXMgaXQ/ IEEgc3VwZXIgdXNlZnVsIHVzZXItZmFjaW5nIGZlYXR1cmUgdGhhdCBuZWVkcyB0byBiZSBkb2N1 bWVudGVkCj4gbWV0aWN1bG91c2x5LCBvciBhbiBvYnNjdXJlIG9wdGlvbiBmb3IgZXhwZXJ0cyB3 aG8ga25vdyB3aGF0IHRoZXkgYXJlIGRvaW5nPwoKRXZlbiBhbiBvYnNjdXJlIGV4cGVydC1sZXZl bCBmZWF0dXJlIHJlcXVpcmVzIGRvY3VtZW50YXRpb24uCgo+IEFud2F5cywgdW5sZXNzIHlvdSBo YXZlIG1vcmUgY29uY3JldGUgZmVlZGJhY2ssIEkgYW0gZ29pbmcgdG8gY29uc2lkZXIgdGhlCj4g Y3VycmVudCB2ZXJzaW9uIG9mIHRoaXMgc2VyaWVzIChvbiBGb3JnZUpvKSBhcyBmaW5hbCBhbmQg bWVyZ2UgaXQgaW4gfjcySAo+IGlmIHRoZXJlIGlzIG5vIGZ1cnRoZXIgKGxlZ2l0aW1hdGUpIG9i amVjdGlvbi4KPiAKPiBJZiB5b3UgZGlzYWdyZWUgd2l0aCB0aGF0LCBJIHN1Z2dlc3Qgd2UgaW52 b2x2ZSB0aGUgVEMsIGFzIEkgZG9uJ3Qgc2VlIHVzCj4gbWFraW5nIG1vcmUgZ3JvdW5kcyBoZXJl LgoKVGhlbiBJIHdpbGwuCgotLSAKICBOaWNvbGFzIEdlb3JnZQpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpmZm1wZWctZGV2ZWwgbWFpbGluZyBsaXN0CmZm bXBlZy1kZXZlbEBmZm1wZWcub3JnCmh0dHBzOi8vZmZtcGVnLm9yZy9tYWlsbWFuL2xpc3RpbmZv L2ZmbXBlZy1kZXZlbAoKVG8gdW5zdWJzY3JpYmUsIHZpc2l0IGxpbmsgYWJvdmUsIG9yIGVtYWls CmZmbXBlZy1kZXZlbC1yZXF1ZXN0QGZmbXBlZy5vcmcgd2l0aCBzdWJqZWN0ICJ1bnN1YnNjcmli ZSIuCg==