diff --git a/enjoy/src/i18n/en.json b/enjoy/src/i18n/en.json
index 28207f3b..ecbbce5e 100644
--- a/enjoy/src/i18n/en.json
+++ b/enjoy/src/i18n/en.json
@@ -309,7 +309,9 @@
   "welcomeBack": "Welcome back! {{name}}",
   "print": "Print",
   "download": "Download",
-  "downloading": "Downloading {{file}}",
+  "downloadingFile": "Downloading {{file}}",
+  "downloading": "Downloading",
+  "importing": "Importing",
   "downloadedSuccessfully": "Downloaded successfully",
   "downloadFailed": "Download failed",
   "chooseAIModelDependingOnYourHardware": "Choose AI Model depending on your hardware.",
diff --git a/enjoy/src/i18n/zh-CN.json b/enjoy/src/i18n/zh-CN.json
index a807f92c..ee7baf82 100644
--- a/enjoy/src/i18n/zh-CN.json
+++ b/enjoy/src/i18n/zh-CN.json
@@ -309,7 +309,9 @@
   "welcomeBack": "欢迎回来, {{name}}",
   "print": "打印",
   "download": "下载",
-  "downloading": "正在下载 {{file}}",
+  "downloadingFile": "正在下载 {{file}}",
+  "downloading": "正在下载",
+  "importing": "正在导入",
   "downloadedSuccessfully": "下载成功",
   "downloadFailed": "下载失败",
   "chooseAIModelDependingOnYourHardware": "根据您的硬件选择合适的 AI 模型, 以便语音转文本服务正常工作",
diff --git a/enjoy/src/main/db/models/audio.ts b/enjoy/src/main/db/models/audio.ts
index cbbf89c9..f2c13367 100644
--- a/enjoy/src/main/db/models/audio.ts
+++ b/enjoy/src/main/db/models/audio.ts
@@ -2,7 +2,6 @@ import {
   AfterCreate,
   AfterUpdate,
   AfterDestroy,
-  BeforeCreate,
   BelongsTo,
   Table,
   Column,
@@ -36,8 +35,6 @@ import startCase from "lodash/startCase";
 import { v5 as uuidv5 } from "uuid";
 import FfmpegWrapper from "@main/ffmpeg";
 
-const SIZE_LIMIT = 1024 * 1024 * 50; // 50MB
-
 const logger = log.scope("db/models/audio");
 
 @Table({
@@ -127,7 +124,13 @@ export class Audio extends Model<Audio> {
 
   @Column(DataType.VIRTUAL)
   get src(): string {
-    if (this.filePath) {
+    if (this.compressedFilePath) {
+      return `enjoy://${path.posix.join(
+        "library",
+        "audios",
+        this.getDataValue("md5") + ".compressed.mp3"
+      )}`;
+    } else if (this.originalFilePath) {
       return `enjoy://${path.posix.join(
         "library",
         "audios",
@@ -162,6 +165,10 @@ export class Audio extends Model<Audio> {
   }
 
   get filePath(): string {
+    return this.compressedFilePath || this.originalFilePath;
+  }
+
+  get originalFilePath(): string {
     const file = path.join(
       settings.userDataPath(),
       "audios",
@@ -175,6 +182,20 @@ export class Audio extends Model<Audio> {
     }
   }
 
+  get compressedFilePath(): string {
+    const file = path.join(
+      settings.userDataPath(),
+      "audios",
+      this.getDataValue("md5") + ".compressed.mp3"
+    );
+
+    if (fs.existsSync(file)) {
+      return file;
+    } else {
+      return null;
+    }
+  }
+
   async upload(force: boolean = false) {
     if (this.isUploaded && !force) return;
 
@@ -226,20 +247,6 @@ export class Audio extends Model<Audio> {
     return output;
   }
 
-  @BeforeCreate
-  static async setupDefaultAttributes(audio: Audio) {
-    try {
-      const ffmpeg = new Ffmpeg();
-      const fileMetadata = await ffmpeg.generateMetadata(audio.filePath);
-      audio.metadata = Object.assign(audio.metadata || {}, {
-        ...fileMetadata,
-        duration: fileMetadata.format.duration,
-      });
-    } catch (err) {
-      logger.error("failed to generate metadata", err.message);
-    }
-  }
-
   @AfterCreate
   static autoSync(audio: Audio) {
     // auto sync should not block the main thread
@@ -315,11 +322,6 @@ export class Audio extends Model<Audio> {
       throw new Error(t("models.audio.fileNotSupported", { file: filePath }));
     }
 
-    const stats = fs.statSync(filePath);
-    if (stats.size > SIZE_LIMIT) {
-      throw new Error(t("models.audio.fileTooLarge", { file: filePath }));
-    }
-
     const md5 = await hashFile(filePath, { algo: "md5" });
 
     // check if file already exists
@@ -338,15 +340,27 @@ export class Audio extends Model<Audio> {
     logger.debug("Generated ID:", id);
 
     const destDir = path.join(settings.userDataPath(), "audios");
-    const destFile = path.join(destDir, `${md5}${extname}`);
+    const destFile = path.join(destDir, `${md5}.compressed.mp3`);
+
+    let metadata = {
+      extname,
+    };
 
     // Copy file to library
     try {
       // Create directory if not exists
       fs.ensureDirSync(destDir);
 
-      // Copy file
-      fs.copySync(filePath, destFile);
+      // Generate metadata
+      const ffmpeg = new Ffmpeg();
+      const fileMetadata = await ffmpeg.generateMetadata(filePath);
+      metadata = Object.assign(metadata, {
+        ...fileMetadata,
+        duration: fileMetadata.format.duration,
+      });
+
+      // Compress file
+      await ffmpeg.compressAudio(filePath, destFile);
 
       // Check if file copied
       fs.accessSync(destFile, fs.constants.R_OK);
@@ -367,9 +381,7 @@ export class Audio extends Model<Audio> {
       name,
       description,
       coverUrl,
-      metadata: {
-        extname,
-      },
+      metadata,
     });
 
     return record.save().catch((err) => {
diff --git a/enjoy/src/main/db/models/recording.ts b/enjoy/src/main/db/models/recording.ts
index 7df9e293..d5a2ad05 100644
--- a/enjoy/src/main/db/models/recording.ts
+++ b/enjoy/src/main/db/models/recording.ts
@@ -32,6 +32,7 @@ import echogarden from "@main/echogarden";
 import { t } from "i18next";
 import { Attributes, Transaction } from "sequelize";
 import { v5 as uuidv5 } from "uuid";
+import FfmpegWrapper from "@main/ffmpeg";
 
 const logger = log.scope("db/models/recording");
 
@@ -299,14 +300,10 @@ export class Recording extends Model<Recording> {
     }
 
     // rename file
-    const filename = `${md5}.wav`;
-    fs.moveSync(
-      file,
-      path.join(settings.userDataPath(), "recordings", filename),
-      {
-        overwrite: true,
-      }
-    );
+    const filename = `${md5}.mp3`;
+    const destFile = path.join(settings.userDataPath(), "recordings", filename);
+    const ffmpeg = new FfmpegWrapper();
+    await ffmpeg.compressAudio(file, destFile);
 
     const userId = settings.getSync("user.id");
     const id = uuidv5(`${userId}/${md5}`, uuidv5.URL);
diff --git a/enjoy/src/main/db/models/video.ts b/enjoy/src/main/db/models/video.ts
index 58c52f97..aca76fb4 100644
--- a/enjoy/src/main/db/models/video.ts
+++ b/enjoy/src/main/db/models/video.ts
@@ -2,7 +2,6 @@ import {
   AfterCreate,
   AfterUpdate,
   AfterDestroy,
-  BeforeCreate,
   BelongsTo,
   Table,
   Column,
@@ -36,8 +35,6 @@ import startCase from "lodash/startCase";
 import { v5 as uuidv5 } from "uuid";
 import FfmpegWrapper from "@main/ffmpeg";
 
-const SIZE_LIMIT = 1024 * 1024 * 100; // 100MB
-
 const logger = log.scope("db/models/video");
 
 @Table({
@@ -127,7 +124,13 @@ export class Video extends Model<Video> {
 
   @Column(DataType.VIRTUAL)
   get src(): string {
-    if (this.filePath) {
+    if (this.compressedFilePath) {
+      return `enjoy://${path.posix.join(
+        "library",
+        "videos",
+        this.getDataValue("md5") + ".compressed.mp4"
+      )}`;
+    } else if (this.originalFilePath) {
       return `enjoy://${path.posix.join(
         "library",
         "videos",
@@ -162,6 +165,10 @@ export class Video extends Model<Video> {
   }
 
   get filePath(): string {
+    return this.compressedFilePath || this.originalFilePath;
+  }
+
+  get originalFilePath(): string {
     const file = path.join(
       settings.userDataPath(),
       "videos",
@@ -175,6 +182,20 @@ export class Video extends Model<Video> {
     }
   }
 
+  get compressedFilePath(): string {
+    const file = path.join(
+      settings.userDataPath(),
+      "videos",
+      `${this.getDataValue("md5")}.compressed.mp4`
+    );
+
+    if (fs.existsSync(file)) {
+      return file;
+    } else {
+      return null;
+    }
+  }
+
   // generate cover and upload
   async generateCover() {
     if (this.coverUrl) return;
@@ -247,20 +268,6 @@ export class Video extends Model<Video> {
     return output;
   }
 
-  @BeforeCreate
-  static async setupDefaultAttributes(video: Video) {
-    try {
-      const ffmpeg = new Ffmpeg();
-      const fileMetadata = await ffmpeg.generateMetadata(video.filePath);
-      video.metadata = Object.assign(video.metadata || {}, {
-        ...fileMetadata,
-        duration: fileMetadata.format.duration,
-      });
-    } catch (err) {
-      logger.error("failed to generate metadata", err.message);
-    }
-  }
-
   @AfterCreate
   static autoSync(video: Video) {
     // auto sync should not block the main thread
@@ -331,11 +338,6 @@ export class Video extends Model<Video> {
       throw new Error(t("models.video.fileNotSupported", { file: filePath }));
     }
 
-    const stats = fs.statSync(filePath);
-    if (stats.size > SIZE_LIMIT) {
-      throw new Error(t("models.video.fileTooLarge", { file: filePath }));
-    }
-
     const md5 = await hashFile(filePath, { algo: "md5" });
 
     // check if file already exists
@@ -354,15 +356,27 @@ export class Video extends Model<Video> {
     logger.debug("Generated ID:", id);
 
     const destDir = path.join(settings.userDataPath(), "videos");
-    const destFile = path.join(destDir, `${md5}${extname}`);
+    const destFile = path.join(destDir, `${md5}.compressed.mp4`);
+
+    let metadata = {
+      extname,
+    };
 
     // Copy file to library
     try {
       // Create directory if not exists
       fs.ensureDirSync(destDir);
 
-      // Copy file
-      fs.copySync(filePath, destFile);
+      // fetch metadata
+      const ffmpeg = new FfmpegWrapper();
+      const fileMetadata = await ffmpeg.generateMetadata(filePath);
+      metadata = Object.assign(metadata, {
+        ...fileMetadata,
+        duration: fileMetadata.format.duration,
+      });
+
+      // Compress file to destFile
+      await ffmpeg.compressVideo(filePath, destFile);
 
       // Check if file copied
       fs.accessSync(destFile, fs.constants.R_OK);
@@ -383,9 +397,7 @@ export class Video extends Model<Video> {
       name,
       description,
       coverUrl,
-      metadata: {
-        extname,
-      },
+      metadata,
     });
 
     return record.save().catch((err) => {
diff --git a/enjoy/src/main/downloader.ts b/enjoy/src/main/downloader.ts
index 5bde5f45..7db7764d 100644
--- a/enjoy/src/main/downloader.ts
+++ b/enjoy/src/main/downloader.ts
@@ -3,6 +3,7 @@ import path from "path";
 import fs from "fs";
 import mainWin from "@main/window";
 import log from "@main/logger";
+import settings from "@main/settings";
 
 const logger = log.scope("downloader");
 class Downloader {
@@ -24,6 +25,7 @@ class Downloader {
     return new Promise((resolve, _reject) => {
       webContents.downloadURL(url);
 
+      const cachePath = settings.cachePath();
       webContents.session.on("will-download", (_event, item, _webContents) => {
         if (savePath) {
           try {
@@ -36,9 +38,7 @@ class Downloader {
             item.setSavePath(savePath);
           }
         } else {
-          item.setSavePath(
-            path.join(app.getPath("downloads"), item.getFilename())
-          );
+          item.setSavePath(path.join(cachePath, item.getFilename()));
         }
 
         this.tasks.push(item);
diff --git a/enjoy/src/main/ffmpeg.ts b/enjoy/src/main/ffmpeg.ts
index 2c3a5444..9eebbb7d 100644
--- a/enjoy/src/main/ffmpeg.ts
+++ b/enjoy/src/main/ffmpeg.ts
@@ -290,6 +290,70 @@ export default class FfmpegWrapper {
     });
   }
 
+  compressVideo(input: string, output: string) {
+    const ffmpeg = Ffmpeg();
+    return new Promise((resolve, reject) => {
+      ffmpeg
+        .input(input)
+        .outputOptions(
+          "-c:v",
+          "libx264",
+          "-tag:v",
+          "avc1",
+          "-movflags",
+          "faststart",
+          "-crf",
+          "30",
+          "-preset",
+          "superfast"
+        )
+        .on("start", (commandLine) => {
+          logger.info("Spawned FFmpeg with command: " + commandLine);
+          fs.ensureDirSync(path.dirname(output));
+        })
+        .on("end", () => {
+          logger.info(`File "${output}" created`);
+          resolve(output);
+        })
+        .on("error", (err) => {
+          logger.error(err);
+          reject(err);
+        })
+        .save(output);
+    });
+  }
+
+  compressAudio(input: string, output: string) {
+    const ffmpeg = Ffmpeg();
+    return new Promise((resolve, reject) => {
+      ffmpeg
+        .input(input)
+        .outputOptions(
+          "-ar",
+          "16000",
+          "-b:a",
+          "32000",
+          "-ac",
+          "1",
+          "-preset",
+          "superfast"
+        )
+        .on("start", (commandLine) => {
+          logger.info("Spawned FFmpeg with command: " + commandLine);
+          fs.ensureDirSync(path.dirname(output));
+        })
+        .on("end", () => {
+          logger.info(`File "${output}" created`);
+          resolve(output);
+        })
+        .on("error", (err) => {
+          logger.error(err);
+          reject(err);
+        })
+        .save(output);
+    });
+  }
+
   registerIpcHandlers() {
     ipcMain.handle("ffmpeg-check-command", async (_event) => {
       return await this.checkCommand();
diff --git a/enjoy/src/renderer/components/audios/audible-books-segment.tsx b/enjoy/src/renderer/components/audios/audible-books-segment.tsx
index c0a27e94..0627df6f 100644
--- a/enjoy/src/renderer/components/audios/audible-books-segment.tsx
+++ b/enjoy/src/renderer/components/audios/audible-books-segment.tsx
@@ -175,7 +175,11 @@ export const AudibleBooksSegment = () => {
               {downloading && (
                 <LoaderIcon className="w-4 h-4 animate-spin mr-2" />
               )}
-              {t("downloadSample")}
+              {downloading
+                ? progress < 100
+                  ? t("downloading")
+                  : t("importing")
+                : t("downloadSample")}
             </Button>
           </DialogFooter>
 
diff --git a/enjoy/src/renderer/components/chats/chat-user-message.tsx b/enjoy/src/renderer/components/chats/chat-user-message.tsx
index 8b5e9c9b..5c4dbe0b 100644
--- a/enjoy/src/renderer/components/chats/chat-user-message.tsx
+++ b/enjoy/src/renderer/components/chats/chat-user-message.tsx
@@ -276,7 +276,9 @@ const ChatUserMessageActions = (props: {
             savePath as string
           ),
           {
-            loading: t("downloading", { file: chatMessage.recording.filename }),
+            loading: t("downloadingFile", {
+              file: chatMessage.recording.filename,
+            }),
             success: () => t("downloadedSuccessfully"),
             error: t("downloadFailed"),
             position: "bottom-right",
diff --git a/enjoy/src/renderer/components/medias/media-bottom-panel/media-current-recording.tsx b/enjoy/src/renderer/components/medias/media-bottom-panel/media-current-recording.tsx
index 9a21736d..806c3009 100644
--- a/enjoy/src/renderer/components/medias/media-bottom-panel/media-current-recording.tsx
+++ b/enjoy/src/renderer/components/medias/media-bottom-panel/media-current-recording.tsx
@@ -251,7 +251,7 @@ export const MediaCurrentRecording = () => {
         toast.promise(
           EnjoyApp.download.start(currentRecording.src, savePath as string),
           {
-            loading: t("downloading", { file: currentRecording.filename }),
+            loading: t("downloadingFile", { file: currentRecording.filename }),
             success: () => t("downloadedSuccessfully"),
             error: t("downloadFailed"),
             position: "bottom-right",
diff --git a/enjoy/src/renderer/components/medias/media-bottom-panel/media-waveform.tsx b/enjoy/src/renderer/components/medias/media-bottom-panel/media-waveform.tsx
index a25e7a31..70a55999 100644
--- a/enjoy/src/renderer/components/medias/media-bottom-panel/media-waveform.tsx
+++ b/enjoy/src/renderer/components/medias/media-bottom-panel/media-waveform.tsx
@@ -122,7 +122,7 @@ export const MediaWaveform = () => {
         if (!savePath) return;
 
         toast.promise(EnjoyApp.download.start(media.src, savePath as string), {
-          loading: t("downloading", { file: media.filename }),
+          loading: t("downloadingFile", { file: media.filename }),
           success: () => t("downloadedSuccessfully"),
           error: t("downloadFailed"),
           position: "bottom-right",
diff --git a/enjoy/src/renderer/components/medias/media-left-panel/media-recordings.tsx b/enjoy/src/renderer/components/medias/media-left-panel/media-recordings.tsx
index 12fd7e62..c5f9d456 100644
--- a/enjoy/src/renderer/components/medias/media-left-panel/media-recordings.tsx
+++ b/enjoy/src/renderer/components/medias/media-left-panel/media-recordings.tsx
@@ -78,7 +78,7 @@ export const MediaRecordings = () => {
           if (!savePath) return;
 
           toast.promise(EnjoyApp.download.start(url, savePath as string), {
-            loading: t("downloading", { file: filename }),
+            loading: t("downloadingFile", { file: filename }),
             success: () => t("downloadedSuccessfully"),
             error: t("downloadFailed"),
             position: "bottom-right",
diff --git a/enjoy/src/renderer/components/medias/media-left-panel/media-transcription-read-button.tsx b/enjoy/src/renderer/components/medias/media-left-panel/media-transcription-read-button.tsx
index 61fbf322..a1b4f1c0 100644
--- a/enjoy/src/renderer/components/medias/media-left-panel/media-transcription-read-button.tsx
+++ b/enjoy/src/renderer/components/medias/media-left-panel/media-transcription-read-button.tsx
@@ -145,7 +145,7 @@ const TranscriptionRecordingsList = () => {
         toast.promise(
           EnjoyApp.download.start(recording.src, savePath as string),
           {
-            loading: t("downloading", { file: recording.filename }),
+            loading: t("downloadingFile", { file: recording.filename }),
             success: () => t("downloadedSuccessfully"),
             error: t("downloadFailed"),
             position: "bottom-right",
diff --git a/enjoy/src/renderer/components/medias/media-right-panel/media-caption-actions.tsx b/enjoy/src/renderer/components/medias/media-right-panel/media-caption-actions.tsx
index 57c87306..0ce0f68d 100644
--- a/enjoy/src/renderer/components/medias/media-right-panel/media-caption-actions.tsx
+++ b/enjoy/src/renderer/components/medias/media-right-panel/media-caption-actions.tsx
@@ -80,7 +80,7 @@ export const MediaCaptionActions = (props: {
         toast.promise(
           EnjoyApp.download.start(segment.src, savePath as string),
           {
-            loading: t("downloading", { file: media.filename }),
+            loading: t("downloadingFile", { file: media.filename }),
             success: () => t("downloadedSuccessfully"),
             error: t("downloadFailed"),
             position: "bottom-right",
@@ -133,7 +133,7 @@ export const MediaCaptionActions = (props: {
         if (!savePath) return;
 
         toast.promise(EnjoyApp.download.start(src, savePath as string), {
-          loading: t("downloading", { file: media.filename }),
+          loading: t("downloadingFile", { file: media.filename }),
           success: () => t("downloadedSuccessfully"),
           error: t("downloadFailed"),
           position: "bottom-right",
diff --git a/enjoy/src/renderer/components/messages/assistant-message.tsx b/enjoy/src/renderer/components/messages/assistant-message.tsx
index 67e65bd3..107e87f1 100644
--- a/enjoy/src/renderer/components/messages/assistant-message.tsx
+++ b/enjoy/src/renderer/components/messages/assistant-message.tsx
@@ -142,7 +142,7 @@ export const AssistantMessageComponent = (props: {
         if (!savePath) return;
 
         toast.promise(EnjoyApp.download.start(speech.src, savePath as string), {
-          loading: t("downloading", { file: speech.filename }),
+          loading: t("downloadingFile", { file: speech.filename }),
           success: () => t("downloadedSuccessfully"),
           error: t("downloadFailed"),
           position: "bottom-right",
diff --git a/enjoy/src/renderer/components/videos/youtube-videos-segment.tsx b/enjoy/src/renderer/components/videos/youtube-videos-segment.tsx
index a5f26ceb..7cbab0c6 100755
--- a/enjoy/src/renderer/components/videos/youtube-videos-segment.tsx
+++ b/enjoy/src/renderer/components/videos/youtube-videos-segment.tsx
@@ -161,7 +161,11 @@ export const YoutubeVideosSegment = (props: { channel: string }) => {
               {submitting && (
                 <LoaderIcon className="w-4 h-4 animate-spin mr-2" />
               )}
-              {t("downloadVideo")}
+              {submitting
+                ? progress < 100
+                  ? t("downloading")
+                  : t("importing")
+                : t("downloadVideo")}
             </Button>
           </DialogFooter>
           {submitting && (
diff --git a/enjoy/src/renderer/hooks/use-pronunciation-assessments.tsx b/enjoy/src/renderer/hooks/use-pronunciation-assessments.tsx
index e5e01d92..7a7d17ac 100644
--- a/enjoy/src/renderer/hooks/use-pronunciation-assessments.tsx
+++ b/enjoy/src/renderer/hooks/use-pronunciation-assessments.tsx
@@ -19,7 +19,8 @@ export const usePronunciationAssessments = () => {
     }
 
     EnjoyApp.recordings.sync(recording.id);
-    const blob = await (await fetch(recording.src)).blob();
+    const url = await EnjoyApp.echogarden.transcode(recording.src);
+    const blob = await (await fetch(url)).blob();
     targetId = recording.id;
     targetType = "Recording";