Audio Desyncing after import

[kalamazoofumc]

Hello,

I am having an issue where after I import a video file (MPEG-4 movie) into Premiere Elements the audio is completely desynced from the video. When I watch the video in quicktime the audio is fine, but after import into Premiere Elements it is completely off. After spending about 10 min trying to move the audio back into place it seems that somwhere the audio got completely messed up. This is because it can be matched up in the beginning, but another 1o or 15min in the audio will again be ahead or behind. Thus meaning the audio is not syncing the same as the video.

I have tried with other similar video files to recreate the issue, but haven't had any luck doing so.

Not sure what im doing wrong, But if anyone has any helpful insight it would be great.

[Steve Grisetti]

This is likely an issue with your video using a variable frame rate.

Open your video in the free download MediaInfo. In MediaInfo, set View to Text and then copy and paste the report it generates to this forum. Once we know what your video is made of we'll be better able to advise you.

[kalamazoofumc]

General

Complete name                            : /Volumes/Service Storage/All services/2018/"Under Heaven-The Seasons of Life" 08:12 -1000.mp4

Format                                   : MPEG-4

Format profile                           : Base Media / Version 2

Codec ID                                 : mp42 (mp41/mp42/isom)

File size                                : 1.58 GiB

Duration                                 : 1 h 10 min

Overall bit rate mode                    : Variable

Overall bit rate                         : 3 202 kb/s

Encoded date                             : UTC 2018-08-12 15:17:50

Tagged date                              : UTC 2018-08-12 15:18:03

Video

ID                                       : 1

Format                                   : AVC

Format/Info                              : Advanced Video Codec

Format profile                           : Main@L3.1

Format settings                          : CABAC / 2 Ref Frames

Format settings, CABAC                   : Yes

Format settings, ReFrames                : 2 frames

Codec ID                                 : avc1

Codec ID/Info                            : Advanced Video Coding

Duration                                 : 1 h 10 min

Source duration                          : 1 h 10 min

Source_Duration_LastFrame                : 6 s 233 ms

Bit rate mode                            : Variable

Bit rate                                 : 3 069 kb/s

Maximum bit rate                         : 768 kb/s

Width                                    : 1 280 pixels

Height                                   : 720 pixels

Display aspect ratio                     : 16:9

Frame rate mode                          : Constant

Frame rate                               : 30.000 FPS

Color space                              : YUV

Chroma subsampling                       : 4:2:0

Bit depth                                : 8 bits

Scan type                                : Progressive

Bits/(Pixel*Frame)                       : 0.111

Stream size                              : 1.52 GiB (96%)

Source stream size                       : 1.52 GiB (96%)

Title                                    : Core Media Video

Encoded date                             : UTC 2018-08-12 15:17:50

Tagged date                              : UTC 2018-08-12 15:18:03

Audio

ID                                       : 2

Format                                   : AAC

Format/Info                              : Advanced Audio Codec

Format profile                           : LC

Codec ID                                 : mp4a-40-2

Duration                                 : 1 h 10 min

Source duration                          : 1 h 10 min

Bit rate mode                            : Constant

Bit rate                                 : 128 kb/s

Channel(s)                               : 2 channels

Channel positions                        : Front: L R

Sampling rate                            : 44.1 kHz

Frame rate                               : 43.066 FPS (1024 SPF)

Compression mode                         : Lossy

Stream size                              : 64.8 MiB (4%)

Source stream size                       : 64.8 MiB (4%)

Title                                    : Core Media Audio

Encoded date                             : UTC 2018-08-12 15:17:50

Tagged date                              : UTC 2018-08-12 15:18:03

[kalamazoofumc]

Looks like my frame rate for my video is lower than the frame rate for the audio. Is that the problem you are seeing Steve?

[Steve Grisetti]

I've seen issues with the MP42 codec, but I don't know a lot about it.

Just as a test, try running one of your videos through the free download Handbrake, the world's greatest video converter. See if the MP4 it creates has the same issues in Premiere Elements.

Where did this video come from? Is it from a camcorder?

[kalamazoofumc]

Ok, I ran the video through handbreak and created an MP4, then loaded that video into Premiere Elements. The audio is still a second or 2 off from the video, which is much closer than the original problem I was having with the audio being 5-6 seconds off.

The video is not from a camcorder. We are using 3 of Panasonic AW-HE40SK PZT Camera with HD-SDI Output. They are eventually being sent to Wirecast V.8.2.0. where we stream and record.

[Steve Grisetti · Accepted solution]

This is not really the kind of consumer camcorder this program is designed to work with. It's a $100 program -- not really made to interface with a $3500 camcorder.

I'd recommend you edit with a professional program, like Premiere Pro CC. This video may well be out of this little consumer program's league.

[kalamazoofumc]

Thanks Steve, I had a feeling that could be the issue. Not sure why the church I work for would spend that much on a camera and then go cheap on the editing software.