diff --git a/src/App.jsx b/src/App.jsx
index 14f9a72a..67b8cdff 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -1585,7 +1585,8 @@ const App = memo(() => {
     if (!checkFileOpened() || workingRef.current) return;
     try {
       setWorking(i18n.t('Fixing file duration'));
-      const path = await fixInvalidDuration({ fileFormat, customOutDir });
+      setCutProgress(0);
+      const path = await fixInvalidDuration({ fileFormat, customOutDir, duration, onProgress: setCutProgress });
       toast.fire({ icon: 'info', text: i18n.t('Duration has been fixed') });
       await loadMedia({ filePath: path, customOutDir });
     } catch (err) {
@@ -1593,8 +1594,9 @@ const App = memo(() => {
       console.error('Failed to fix file duration', err);
     } finally {
       setWorking();
+      setCutProgress();
     }
-  }, [checkFileOpened, customOutDir, fileFormat, fixInvalidDuration, loadMedia, setWorking]);
+  }, [checkFileOpened, customOutDir, duration, fileFormat, fixInvalidDuration, loadMedia, setWorking]);
 
   const addStreamSourceFile = useCallback(async (path) => {
     if (allFilesMeta[path]) return undefined; // Already added?
diff --git a/src/ffmpeg.js b/src/ffmpeg.js
index 1b3b1b00..617c4d9d 100644
--- a/src/ffmpeg.js
+++ b/src/ffmpeg.js
@@ -61,6 +61,7 @@ export async function runFfprobe(args, { timeout = isDev ? 10000 : 30000 } = {})
   }
 }
 
+// todo collect warnings from ffmpeg output and show them after export? example: https://github.com/mifi/lossless-cut/issues/1469
 export function runFfmpeg(args, execaOptions, { logCli = true } = {}) {
   const ffmpegPath = getFfmpegPath();
   if (logCli) console.log(getFfCommandLine('ffmpeg', args));
@@ -79,6 +80,17 @@ export function runFfmpeg(args, execaOptions, { logCli = true } = {}) {
   return process;
 }
 
+export function logStdoutStderr({ stdout, stderr }) {
+  if (stdout.length > 0) {
+    console.log('%cSTDOUT:', 'color: green; font-weight: bold');
+    console.log(stdout);
+  }
+  if (stderr.length > 0) {
+    console.log('%cSTDERR:', 'color: blue; font-weight: bold');
+    console.log(stderr);
+  }
+}
+
 export function abortFfmpegs() {
   runningFfmpegs.forEach((process) => {
     process.kill('SIGTERM', { forceKillAfterTimeout: 10000 });
diff --git a/src/hooks/useFfmpegOperations.js b/src/hooks/useFfmpegOperations.js
index 142c2579..a90cd6fd 100644
--- a/src/hooks/useFfmpegOperations.js
+++ b/src/hooks/useFfmpegOperations.js
@@ -4,7 +4,7 @@ import sum from 'lodash/sum';
 import pMap from 'p-map';
 
 import { getSuffixedOutPath, transferTimestamps, getOutFileExtension, getOutDir, deleteDispositionValue, getHtml5ifiedPath } from '../util';
-import { isCuttingStart, isCuttingEnd, handleProgress, getFfCommandLine, getDuration, runFfmpeg, createChaptersFromSegments, readFileMeta, cutEncodeSmartPart, getExperimentalArgs, html5ify as ffmpegHtml5ify, getVideoTimescaleArgs, RefuseOverwriteError } from '../ffmpeg';
+import { isCuttingStart, isCuttingEnd, handleProgress, getFfCommandLine, getDuration, runFfmpeg, createChaptersFromSegments, readFileMeta, cutEncodeSmartPart, getExperimentalArgs, html5ify as ffmpegHtml5ify, getVideoTimescaleArgs, RefuseOverwriteError, logStdoutStderr } from '../ffmpeg';
 import { getMapStreamsArgs, getStreamIdsToCopy } from '../util/streams';
 import { getSmartCutParams } from '../smartcut';
 
@@ -160,8 +160,8 @@ function useFfmpegOperations({ filePath, enableTransferTimestamps }) {
 
       stringToStream(concatTxt).pipe(process.stdin);
 
-      const { stdout } = await process;
-      console.log(stdout);
+      const result = await process;
+      logStdoutStderr(result);
 
       await optionalTransferTimestamps(metadataFromPath, outPath);
 
@@ -315,7 +315,7 @@ function useFfmpegOperations({ filePath, enableTransferTimestamps }) {
     const process = runFfmpeg(ffmpegArgs);
     handleProgress(process, cutDuration, onProgress);
     const result = await process;
-    console.log(result.stdout);
+    logStdoutStderr(result);
 
     await optionalTransferTimestamps(filePath, outPath, cutFrom);
   }, [filePath, optionalTransferTimestamps]);
@@ -483,14 +483,14 @@ function useFfmpegOperations({ filePath, enableTransferTimestamps }) {
     const process = runFfmpeg(ffmpegArgs);
     handleProgress(process, duration, onProgress);
 
-    const { stdout } = await process;
-    console.log(stdout);
+    const result = await process;
+    logStdoutStderr(result);
 
     await optionalTransferTimestamps(filePathArg, outPath);
   }, [optionalTransferTimestamps]);
 
   // https://stackoverflow.com/questions/34118013/how-to-determine-webm-duration-using-ffprobe
-  const fixInvalidDuration = useCallback(async ({ fileFormat, customOutDir }) => {
+  const fixInvalidDuration = useCallback(async ({ fileFormat, customOutDir, duration, onProgress }) => {
     const ext = getOutFileExtension({ outFormat: fileFormat, filePath });
     const outPath = getSuffixedOutPath({ customOutDir, filePath, nameSuffix: `reformatted${ext}` });
 
@@ -508,9 +508,11 @@ function useFfmpegOperations({ filePath, enableTransferTimestamps }) {
       '-y', outPath,
     ];
 
-    // TODO progress
-    const { stdout } = await runFfmpeg(ffmpegArgs);
-    console.log(stdout);
+    const process = runFfmpeg(ffmpegArgs);
+    handleProgress(process, duration, onProgress);
+
+    const result = await process;
+    logStdoutStderr(result);
 
     await optionalTransferTimestamps(filePath, outPath);