diff --git a/packages/client/src/scripts/select-file-enc.ts b/packages/client/src/scripts/select-file-enc.ts
new file mode 100644
index 000000000..037e6425f
--- /dev/null
+++ b/packages/client/src/scripts/select-file-enc.ts
@@ -0,0 +1,155 @@
+import * as os from '@/os';
+import { stream } from '@/stream';
+import { i18n } from '@/i18n';
+import { defaultStore } from '@/store';
+import { DriveFile } from 'misskey-js/built/entities';
+import { fs } from 'fs';
+import { createFFmpeg, fetchFile } from '@ffmpeg/ffmpeg';
+
+
+function select(src: any, label: string | null, multiple: boolean): Promise<DriveFile | DriveFile[]> {
+	return new Promise((res, rej) => {
+
+		
+		const chooseFileFromPc = () => {
+			const input = document.createElement('input');
+			input.type = 'file';
+			input.onchange = () => {
+
+
+
+
+
+				const readFromBlobOrFile = (blob) => (
+					console.log('start readfrombloborfile'),
+					new Promise((resolve, reject) => {
+						const reader = new FileReader();
+						reader.onload = () => {
+							resolve(reader.result);
+						};
+						reader.onerror = ({ target: { error: { code } } }) => {
+							reject(os.alert({ type: 'error', text: 'file could not be read! ' + code }));
+						};
+						reader.readAsArrayBuffer(blob);
+					}
+				));
+
+
+					
+				
+					const ffmpeg = createFFmpeg({ log: true });
+					async function ffmpegconv() {
+						os.toast('Start const ffmpegconv');
+						console.log('Start const ffmpegconv');
+						var infilename = Array.from(input.files[0].name);
+						let video = null;
+						var outfilename = infilename.replace(/\.[^/.]+$/, '') + '.mp4';
+						os.toast('Start await beffile');
+						//ここでストップ
+						console.log('Start await beffile');
+						const befFile = new Uint8Array(await readFromBlobOrFile(input.files[0]));
+
+						os.toast('Loading FFmpeg.wasm');
+						console.log('Loading FFmpeg.wasm');
+						if (!ffmpeg.isLoaded()) {
+							os.toast('Loading FFmpeg.wasm-core');
+							console.log('Loading FFmpeg.wasm-core');
+							await ffmpeg.load();
+						}
+						os.toast('Set ffmpeg files');
+						console.log('Set ffmpeg files');
+						ffmpeg.FS('writeFile', infilename, await fetchFile(befFile));
+						os.toast('Converting')
+						await ffmpeg.run('-i', `video.avi`, '-c:v', 'copy', '-c:a', 'copy', `video.mp4`);
+						os.toast('Converted')
+						const aftFile = ffmpeg.FS('readFile', outfilename);
+						os.toast('Uploading')
+						video.value = URL.createObjectURL(new Blob([aftFile.buffer], { type: 'video/mp4' }));
+						os.upload(video, defaultStore.state.uploadFolder).then(res).catch(e => { os.alert({ type: 'error', text: e }) });
+					};
+					
+
+				//const promises = Array.from(input.files).map(file => os.upload(file, defaultStore.state.uploadFolder));
+
+				//Promise.all(promises).then(driveFiles => {
+				//	res(multiple ? driveFiles : driveFiles[0]);
+				//}).catch(e => {
+				//	os.alert({
+				//		type: 'error',
+				//		text: e
+				//	});
+				//});
+				os.toast('Try use FFmpeg.wasm')
+				ffmpegconv();
+				
+
+
+				// 一応廃棄
+				(window as any).__misskey_input_ref__ = null;
+			};
+
+			// https://qiita.com/fukasawah/items/b9dc732d95d99551013d
+			// iOS Safari で正常に動かす為のおまじない
+			(window as any).__misskey_input_ref__ = input;
+
+			input.click();
+
+
+
+		};
+
+		const chooseFileFromDrive = () => {
+			os.selectDriveFile(multiple).then(files => {
+				res(files);
+			});
+		};
+
+		const chooseFileFromUrl = () => {
+			os.inputText({
+				title: i18n.locale.uploadFromUrl,
+				type: 'url',
+				placeholder: i18n.locale.uploadFromUrlDescription
+			}).then(({ canceled, result: url }) => {
+				if (canceled) return;
+
+				const marker = Math.random().toString(); // TODO: UUIDとか使う
+
+				const connection = stream.useChannel('main');
+				connection.on('urlUploadFinished', data => {
+					if (data.marker === marker) {
+						res(multiple ? [data.file] : data.file);
+						connection.dispose();
+					}
+				});
+
+				os.api('drive/files/upload-from-url', {
+					url: url,
+					folderId: defaultStore.state.uploadFolder,
+					marker
+				});
+
+				os.alert({
+					title: i18n.locale.uploadFromUrlRequested,
+					text: i18n.locale.uploadFromUrlMayTakeTime
+				});
+			});
+		};
+
+		os.popupMenu([label ? {
+			text: label,
+			type: 'label'
+		} : undefined, {
+			text: i18n.locale.upload,
+			icon: 'fas fa-upload',
+			action: chooseFileFromPc
+		}], src);
+	});
+}
+
+export function selectFileEnc(src: any, label: string | null = null): Promise<DriveFile> {
+	return select(src, label, false) as Promise<DriveFile>;
+}
+
+export function selectFilesEnc(src: any, label: string | null = null): Promise<DriveFile[]> {
+	return select(src, label, true) as Promise<DriveFile[]>;
+}