# Original quality conversion add delay on vidéo
**URL:** https://forums.plex.tv/t/original-quality-conversion-add-delay-on-video/915680
**Category:** General Discussions
**Created:** [April 30, 2025, 3:29pm UTC](https://forums.plex.tv/t/original-quality-conversion-add-delay-on-video/915680 "2025-04-30T15:29:37Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@duelooser](https://forums.plex.tv/u/duelooser)
#### Post date: [April 30, 2025, 3:29pm UTC](https://forums.plex.tv/t/original-quality-conversion-add-delay-on-video/915680/1 "2025-04-30T15:29:37Z")
Hello,
I’ve encountered an issue with audio/video sync when playing a movie after encoding it in “Original Quality” using Plex.
The original MKV file plays perfectly on Plex (both Windows app and smart TV). But once I transcode it using the “Original Quality” preset, the resulting MP4 file has a noticeable delay — only when played in Plex (on Windows and on TV).
When I play the transcoded MP4 in VLC, there is no delay — everything is perfectly in sync.
My Plex Media Server is running on Windows, version 1.41.6.9685.
Has anyone else encountered this issue?
Here are the details of the two files:
✅ Original File (working fine)
Media:
```
Duration: 1:49:36
Bitrate: 878 kbps
Width: 720
Height: 300
Aspect Ratio: 2.35
Video Resolution: SD
Container: MKV
Video Frame Rate: 24p
Audio Profile: LC
Video Profile: High
Title: Original
```
Part:
```
Duration: 1:49:36
File: Le Rythme de la vengeance (2020).mkv
Size: 688.49 MB
Audio Profile: LC
Container: MKV
Video Profile: High
```
Video Stream:
```
Codec: H.264
Bitrate: 878 kbps
Bit Depth: 8
Chroma Location: left
Chroma Subsampling: 4:2:0
Coded Height: 304
Coded Width: 720
Frame Rate: 23.976 fps
Height: 300
Level: 4.0
Profile: High
Ref Frames: 4
Scan Type: Progressive
Width: 720
Display Title: SD (H.264)
Extended Display Title: SD (H.264)
```
Audio Stream:
```
Codec: AAC
Channels: 2
Audio Channel Layout: Stereo
Profile: LC
Sampling Rate: 48000 Hz
Display Title: Unknown (AAC Stereo)
Extended Display Title: Unknown (AAC Stereo)
```
❌ Transcoded File (with delay)
Media:
```
Duration: 1:49:36
Bitrate: 880 kbps
Width: 720
Height: 300
Aspect Ratio: 2.35
Video Resolution: SD
Container: MP4
Video Frame Rate: 24p
Web Optimized: Yes
Proxy Type: 42
Audio Profile: LC
Target: Original Quality
Target Tag ID: 3
Video Profile: High
Title: Original Quality
```
Part:
```
Duration: 1:49:36
File: Le Rythme de la vengeance (2020).mp4
Size: 690.26 MB
Audio Profile: LC
Container: MP4
Web Optimized: Yes
Video Profile: High
```
Video Stream:
```
Codec: H.264
Bitrate: 679 kbps
Bit Depth: 8
Chroma Location: left
Chroma Subsampling: 4:2:0
Coded Height: 304
Coded Width: 720
Frame Rate: 23.976 fps
Height: 300
Level: 4.0
Profile: High
Ref Frames: 4
Scan Type: Progressive
Stream Identifier: 1
Width: 720
Display Title: SD (H.264)
Extended Display Title: SD (H.264)
```
Audio Stream:
```
Codec: AAC
Channels: 2
Bitrate: 196 kbps
Audio Channel Layout: Stereo
Profile: LC
Sampling Rate: 48000 Hz
Stream Identifier: 2
Display Title: Unknown (AAC Stereo)
Extended Display Title: Unknown (AAC Stereo)
```
Any help would be much appreciated!
Thanks in advance!
---
### Author:  [@system](https://forums.plex.tv/u/system)
#### Post date: [July 29, 2025, 3:30pm UTC](https://forums.plex.tv/t/original-quality-conversion-add-delay-on-video/915680/2 "2025-07-29T15:30:23Z")
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