Where is my sound?

pilsburypie wrote on 7/21/2015, 6:14 AM

Got a weird problem I can't seem to work out. Just imported a load of clips into my timeline (pro 11) and all look fine. But some play with no sound.

All have sound as shown in the audio section of the timeline, but the ones that don't play sound show the level in the timeline indicator but not on the master sound levels.

How do I fix this? There seems no reason to me why the sound is not playing on these clips. Tried closing and opening Vegas, tried deleting and adding the clips again, but the same thing occurs.

Comments

dxdy wrote on 7/21/2015, 6:50 AM

What is the format of the clips? Use Mediainfo to show us the format. Are all the clips the same format?

pilsburypie wrote on 7/21/2015, 8:22 AM

All the clips are AVCHD m2ts format. Clips taken on the same day minutes apart are fine, others are not. All clearly have sound, just that some clips don't play sound on the Vegas timeline even though it shows up on the audio track.

General
ID : 1 (0x1)
Complete name : B:\Videos\HD Raw footage 2015\18-07-2015\18-07-2015_180046.m2ts
Format : BDAV
Format/Info : Blu-ray Video
File size : 101 MiB
Duration : 32s 99ms
Overall bit rate mode : Variable
Overall bit rate : 26.4 Mbps
Maximum Overall bit rate : 28.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=3, N=24
Codec ID : 27
Duration : 32s 120ms
Bit rate mode : Variable
Bit rate : 25.0 Mbps
Maximum bit rate : 26.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.241
Stream size : 95.6 MiB (95%)

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 32s 192ms
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -40ms
Stream size : 1.47 MiB (1%)

Text
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Duration : 31s 616ms
Delay relative to video : -40ms

pilsburypie wrote on 7/21/2015, 8:33 AM

I have solved my own problem - but this leads onto another question. Any clip after 1hr 41minutes on the timeline does not play sound. If I move that clip inside the 1hr 41 minute mark, the sound plays.

How weird is that? What is up?

Chienworks wrote on 7/21/2015, 10:51 AM

Does the same thing happen with all projects? Can you start a new project, put the same clip on the timeline, and have it play successfully after 1:41?

I'm wondering if maybe you have an audio effect on that track or on the main buss that has a keyframe set to silence it at that point? Or maybe you have a volume envelope on that track?