Add basic video editor support

server/lib/video-editor.ts

@@ -0,0 +1,32 @@
+import { MVideoFullLight } from "@server/types/models"
+import { getVideoStreamDuration } from "@shared/extra-utils"
+import { VideoEditorTask } from "@shared/models"
+
+function buildTaskFileFieldname (indice: number, fieldName = 'file') {
+  return `tasks[${indice}][options][${fieldName}]`
+}
+
+function getTaskFile (files: Express.Multer.File[], indice: number, fieldName = 'file') {
+  return files.find(f => f.fieldname === buildTaskFileFieldname(indice, fieldName))
+}
+
+async function approximateIntroOutroAdditionalSize (video: MVideoFullLight, tasks: VideoEditorTask[], fileFinder: (i: number) => string) {
+  let additionalDuration = 0
+
+  for (let i = 0; i < tasks.length; i++) {
+    const task = tasks[i]
+
+    if (task.name !== 'add-intro' && task.name !== 'add-outro') continue
+
+    const filePath = fileFinder(i)
+    additionalDuration += await getVideoStreamDuration(filePath)
+  }
+
+  return (video.getMaxQualityFile().size / video.duration) * additionalDuration
+}
+
+export {
+  approximateIntroOutroAdditionalSize,
+  buildTaskFileFieldname,
+  getTaskFile
+}