refactor: убрать useNvenc и разделить выбор энкодера/декодера

src/utils/index.ts

@@ -5,6 +5,7 @@ export {
   checkNvenc,
   checkAV1Support,
   detectHardwareEncoders,
+  detectHardwareDecoders,
   execFFmpeg,
   execMP4Box,
   setLogFile

src/utils/system.ts

@@ -1,6 +1,6 @@
 import { spawn } from 'node:child_process';
 import { appendFile } from 'node:fs/promises';
-import type { HardwareAccelerator, HardwareEncoderInfo } from '../types';
+import type { HardwareAccelerator, HardwareDecoderInfo, HardwareEncoderInfo } from '../types';
 
 // Global variable for log file path
 let currentLogFile: string | null = null;
@@ -159,6 +159,40 @@ export async function detectHardwareEncoders(): Promise<HardwareEncoderInfo[]> {
   return detected;
 }
 
+/**
+ * Получить список доступных аппаратных декодеров (по выводу ffmpeg -hwaccels)
+ */
+export async function detectHardwareDecoders(): Promise<HardwareDecoderInfo[]> {
+  const output: string = await new Promise((resolve) => {
+    const proc = spawn('ffmpeg', ['-hide_banner', '-hwaccels']);
+    let data = '';
+    proc.stdout.on('data', (chunk) => data += chunk.toString());
+    proc.on('error', () => resolve(''));
+    proc.on('close', () => resolve(data));
+  });
+
+  const lines = output.split('\n').map(l => l.trim()).filter(Boolean);
+  const decoders: HardwareDecoderInfo[] = [];
+
+  const map: Record<string, HardwareAccelerator> = {
+    cuda: 'nvenc',
+    qsv: 'qsv',
+    vaapi: 'vaapi',
+    videotoolbox: 'videotoolbox',
+    v4l2m2m: 'v4l2',
+    dxva2: 'amf'
+  };
+
+  for (const line of lines) {
+    const acc = map[line];
+    if (acc) {
+      decoders.push({ accelerator: acc });
+    }
+  }
+
+  return decoders;
+}
+
 /**
  * Execute FFmpeg command with progress tracking
  */