New Install 4/2/2020, mp4's import OK but mp4's output audio is out of sync

Forum|Forum|6 years ago
April 2, 2020
2 replies
544 views

This is a new purchase/install as of 4/2/2020. I open an .mp4 file and it plays fine in the editor. I trim off the front and back then save to an mp4 file. New file's audio is out of sync when played back. As a test I opened the newly exported file back into premiere to see if the audio was correct. It was not. The audio becomes out of sync when I export. (HD 720) Also tried Higher quality setting. No change.

I need help with this fast.

Thank you

Performance

This topic has been closed for replies.

Correct answer Ann Bens

If the files are variable framerate they most of the time go out of sync.

Run the files through Handbrake and set it to Constant Framerate before importing into Elements.

HandBrake

S

Steve Grisetti

Legend

I agree with Ann. It sounds like your video has a variable frame rate. Although version 2020 should be able to work with it. Are you using version 2020? On what operating system?

Open one of your 1280x720 videos in the free download MediaInfo. In MediaInfo, set View to Text and then copy this text and paste it to this forum. Once we know the specs of your video we'll be better able to advise you.

K

krazeecomAuthor

Participant

Yes, latest version purchased and installed 4/2/2020 from Adobe

Mediainfo text output:

General
Complete name : C:\Users\David\Desktop\RAW_CameraRoll\WIN_20200402_11_06_03_Pro (2).mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp41/isom)
File size : 1.51 GiB
Duration : 27 min 1 s
Overall bit rate mode : Constant
Overall bit rate : 8 007 kb/s
Encoded date : UTC 2020-04-02 15:06:04
Tagged date : UTC 2020-04-02 15:06:04

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 27 min 1 s
Bit rate mode : Constant
Bit rate : 7 899 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.728 FPS
Minimum frame rate : 6.985 FPS
Maximum frame rate : 36.541 FPS
Original frame rate : 30.000 FPS
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.288
Stream size : 1.48 GiB (98%)
Encoded date : UTC 2020-04-02 15:06:04
Tagged date : UTC 2020-04-02 15:06:04
Color range : Full
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 27 min 1 s
Source duration : 27 min 0 s
Bit rate mode : Constant
Bit rate : 172 kb/s
Nominal bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 33.2 MiB (2%)
Source stream size : 33.2 MiB (2%)
Encoded date : UTC 2020-04-02 15:06:04
Tagged date : UTC 2020-04-02 15:06:04
mdhd_Duration : 1621066

Thanks

S

Steve Grisetti

Legend

As we suspected, the issue is that your video has a variable frame rate.

Although version 2020 should be able to work with this type of video, there is something about your video that isn't allowing it to. The easiest solution is to convert the video with Handbrake, as Ann suggested.