Audio Goes Out of Sync When Exported on Premiere Pro 15.1.0 build 18 (M1)

[jt1972]

At least H254 and H265 exports has this issue. On long exports over 60 min Audio is clearly out of sync.

With QT ProPres exports seems to be OK.

Tested with 1080P50 footage and export.

Please fix this issue ASAP.

[jt1972]

Any news on this?

[mattchristensen]

@jt1972 I'm not seeing this happen on my end. I created a 66 minute timeline and exported it and there was no sync drift. I then took that exported 66 min clip into a new timeline and exported it again, in case the problem is with long clips. I also see no sync drift in that export.

Could you tell me what kind of footage and audio formats you're using? A screenshot of your timeline or sending a copy of your project (without media) could also help get to the bottom of this. Thanks!

[jt1972]

Hi!

The Timeline is DSLR 1920x1080 with 50 fps timebase

Here is info about the files on timeline:

File Path: /Volumes/UNTITLED/Capture0000.mov
Type: QuickTime Movie
File Size: 129,62 GB
Image Size: 1920 x 1080
Frame Rate: 50,00
Source Audio Format: 48000 Hz - 24-bit - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Total Duration: 01:16:51:43
Pixel Aspect Ratio: 1,0
Alpha: None
Color Space: Rec. 709
Color Space Override: Off
Input LUT: None

QuickTime Details:
Movie contains 1 video track(s), 1 audio track(s), 0 closed caption track(s), and 0 timecode track(s).

Video:
There are 230593 frames with a duration of 1/50th.

Video track 1:
Duration is 1:16:51:43
Average frame rate is 50,01 fps

Video track 1 contains 1 type(s) of video data:

Video data block #1:
Frame Size = 1920 x 1080
Compressor = Apple ProRes 422
Quality = Most (5,00)

Audio:
Audio track 1 contains 1 type(s) of audio data:

Audio data block #1:
Format = 24 bit - Stereo
Rate = 48000 Hz
Compressor = in24

File Path: /Volumes/UNTITLED/Capture0001.mov
Type: QuickTime Movie
File Size: 59,15 GB
Image Size: 1920 x 1080
Frame Rate: 50,00
Source Audio Format: 48000 Hz - 24-bit - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Total Duration: 00:34:08:37
Pixel Aspect Ratio: 1,0
Alpha: None
Color Space: Rec. 709
Color Space Override: Off
Input LUT: None

QuickTime Details:
Movie contains 1 video track(s), 1 audio track(s), 0 closed caption track(s), and 0 timecode track(s).

Video:
There are 102437 frames with a duration of 1/50th.

Video track 1:
Duration is 0:34:08:37
Average frame rate is 50,01 fps

Video track 1 contains 1 type(s) of video data:

Video data block #1:
Frame Size = 1920 x 1080
Compressor = Apple ProRes 422
Quality = Most (5,00)

Audio:
Audio track 1 contains 1 type(s) of audio data:

Audio data block #1:
Format = 24 bit - Stereo
Rate = 48000 Hz
Compressor = in24

When the exported timeline is viewed with media player the sound is heard before the events occur on the video.

[jt1972]

Noticed that if the exported file is inported to Premiere then the audio is in sync but not when the file is played thru VLC and QuickTime player

[jt1972]

Any news on this?

mpeg2 seems to export correctly but not h264 & h265