Why is audio clip shorter than video clip in VP17 but not in VP13?

Rich Parry wrote on 12/31/2019, 7:26 PM

When placing some (not all) video clips on a timeline in VP17, the audio clip is shorter than the video clip. For example the video clip is 22 seconds while the audio clip is 20 seconds. This obviously results in audio and video being horribly out of sync. However, when the same clip is placed on the timeline in VP13, the audio and video are same length and in perfect sync.

I have attached a screenshot of the VP13 and VP17 timelines and include"MediaInfo" details of the clip below. What is VP17 doing that VP13 isn’t or visa versa.

Thanks in advance,

Rich

General
Complete name : C:\Users\richa\Desktop\Misc2019-04Poway_01.MP4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 207 MiB
Duration : 21 s 696 ms
Overall bit rate mode : Variable
Overall bit rate : 80.1 Mb/s
Encoded date : UTC 2019-04-20 01:50:46
Tagged date : UTC 2019-04-20 01:50:46
Writing application : Lavf57.48.101
Comment : DE=Unknown, Type=Normal, HQ=Normal, Mode=P

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5
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 : 21 s 689 ms
Bit rate mode : Variable
Bit rate : 80.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.644
Stream size : 207 MiB (100%)
Language : English
Encoded date : UTC 2019-04-20 01:50:46
Tagged date : UTC 2019-04-20 01:50:46
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 21 s 696 ms
Bit rate mode : Constant
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 : 501 KiB (0%)
Language : English
Default : Yes
Alternate group : 1
Encoded date : UTC 2019-04-20 01:50:46
Tagged date : UTC 2019-04-20 01:50:46

Comments

wwaag wrote on 1/1/2020, 1:02 AM

If it is OK in V13, but not in V17 it is most likely a decoding issue. Try disabling the so4compoundplug.dll. Problems with the newer decoder have been raised many times on this forum. To see which decoder is being used, select an event, right-click and select properties. Choose the general tab and scroll down to plug-ins. It will probably show so4compoundplug.dll which is the default. If so, try disabling it in internal Preferences. Once done, it will show the plug-in as compoundplug.dll.

Rich Parry wrote on 1/4/2020, 4:19 PM

wwag,

You are correct, my problem is with so4compoundplug.dll decoder and your solution worked. Thank you,

Rich