web/ffmpeg: universal render function for all needs

web/src/lib/ffmpeg.ts

@@ -4,6 +4,19 @@ import ffmpegCoreWASM from "@imput/ffmpeg-core/wasm?url";
 import { FFmpeg } from "@imput/ffmpeg.wasm";
 import { fetchFile } from "@imput/ffmpeg-util";
 
+type renderParams = {
+    url: string,
+    input: {
+        type: string,
+        format: string,
+    },
+    output: {
+        type: string,
+        format: string,
+    },
+    args: string[],
+}
+
 export default class FFmpegWrapper {
     initialized: boolean;
     ffmpeg: FFmpeg;
@@ -38,24 +51,24 @@ export default class FFmpegWrapper {
         return this.ffmpeg.terminate();
     }
 
-    async renderFile(url: string, type: string, format: string) {
+    async renderFile({ url, input, output, args }: renderParams) {
-        const input = `input.${format}`;
+        const inputFile = `input.${input.format}`;
 
         await this.ffmpeg.writeFile(
-            input,
+            inputFile,
             await fetchFile(url)
         )
 
         await this.ffmpeg.exec([
             '-threads', this.concurrency.toString(),
-            '-i', input,
+            '-i', inputFile,
-            '-c', 'copy',
+            ...args,
-            `output.${format}`
+            `output.${output.format}`
         ]);
 
-        const data = await this.ffmpeg.readFile(`output.${format}`);
+        const data = await this.ffmpeg.readFile(`output.${output.format}`);
         const finalBlob = URL.createObjectURL(
-            new Blob([data], { type: `${type}/${format}` })
+            new Blob([data], { type: `${output.type}/${output.format}` })
         );
 
         return finalBlob