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FFMPEG Binary support contain and cover generate method

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lifegpc
2024-06-09 12:01:18 +08:00
parent 14494d85f6
commit 11cb15aa0e
4 changed files with 50 additions and 6 deletions
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46
thumbnail/ffmpeg_binary.ts
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@@ -1,4 +1,5 @@
import type { ThumbnailConfig } from "./base.ts";
import { ThumbnailAlign } from "./base.ts";
import { type ThumbnailConfig, ThumbnailGenMethod } from "./base.ts";
export async function check_ffmpeg_binary(p: string) {
const cmd = new Deno.Command(p, {
@@ -45,18 +46,59 @@ export async function fb_generate_thumbnail(
o: string,
cfg: ThumbnailConfig,
) {
let add = "";
if (cfg.method == ThumbnailGenMethod.Cover) {
const size = cfg.input ?? await fb_get_size(i);
if (!size) return false;
const twidth = Math.floor(size.width * cfg.height / size.height);
const frwidth = Math.floor(twidth > cfg.width ? twidth : cfg.width);
const frheight = Math.floor(
twidth > cfg.width
? cfg.height
: size.height * cfg.width / size.width,
);
const xy = cfg.align == ThumbnailAlign.Center
? ""
: cfg.align == ThumbnailAlign.Left
? ":x=0:y=0"
: `:x=${frwidth - cfg.width}:y=${frheight - cfg.height}`;
add =
`scale=${frwidth}x${frheight},crop=${cfg.width}:${cfg.height}${xy}`;
} else if (cfg.method == ThumbnailGenMethod.Contain) {
const size = cfg.input ?? await fb_get_size(i);
if (!size) return false;
const twidth = Math.floor(size.width * cfg.height / size.height);
const frwidth = Math.floor(twidth > cfg.width ? cfg.width : twidth);
const frheight = Math.floor(
twidth > cfg.width
? size.height * cfg.width / size.width
: cfg.height,
);
const xy = cfg.align == ThumbnailAlign.Center
? `:x=${Math.floor((cfg.width - frwidth) / 2)}:y=${
Math.floor((cfg.height - frheight) / 2)
}`
: cfg.align == ThumbnailAlign.Left
? ""
: `:x=${cfg.width - frwidth}:y=${cfg.height - frheight}`;
add =
`scale=${frwidth}x${frheight},pad=${cfg.width}:${cfg.height}${xy}:color=white`;
} else {
add = `scale=${cfg.width}:${cfg.height}`;
}
const args = [
"-n",
"-i",
i,
"-vf",
`scale=${cfg.width}:${cfg.height}`,
add,
"-qmin",
`${cfg.quality}`,
"-qmax",
`${cfg.quality}`,
o,
];
console.log(args);
const cmd = new Deno.Command(p, { args, stdout: "null", stderr: "piped" });
const c = cmd.spawn();
const s = await c.output();