Probably.

https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

General
ID                                       : 1 (0x1)
Complete name                            : J:\Temp\Sabine\China-Film\media_w1185218398_b2628000_slger_1.ts
CompleteName_Last                        : J:\Temp\Sabine\China-Film\media_w1185218398_b2628000_slger_27.ts
Format                                   : MPEG-TS
File size                                : 76.8 MiB
Duration                                 : 4 min 27 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 2 404 kb/s

Video
ID                                       : 256 (0x100)
Menu ID                                  : 1 (0x1)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L4.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, RefFrames               : 4 frames
Codec ID                                 : 27
Duration                                 : 4 min 28 s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 25.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 257 (0x101)
Menu ID                                  : 1 (0x1)
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format version                           : Version 4
Format profile                           : LC
Muxing mode                              : ADTS
Codec ID                                 : 15
Duration                                 : 4 min 27 s
Bit rate mode                            : Variable
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Delay relative to video                  : -19 ms

here's what Vegas says about the file (sorry, German version)

Allgemein
  Name: media_w1185218398_b2628000_slger_1.ts
  Ordner: J:\Temp\Sabine\China-Film
  Typ: MPEG-2 Transport Stream
  Größe: 3,13 MB (3.207.468 Byte)
  Erstellt: Dienstag, 12. September 2017, 11:16:57
  Geändert: Dienstag, 12. September 2017, 11:16:57
  Zugriff: Dienstag, 12. September 2017, 11:16:57
  Attribute: Archivieren

Streams
  Video: 00:00:09,900, 50,000 fps progressiv, 1920x1080x12, AVC

ACID-Informationen
  ACID-Chunk: nein
  Stretch-Chunk: nein
  Stretch-Liste: nein
  Stretch-Info2: nein
  Beat-Marker: nein
  Erkannte Beats: nein

Weitere Metadaten
  Regionen/Marker: nein
  Befehlsmarker: nein

Media Manager
  Medientags: nein

Plug-In
  Name: compoundplug.dll
  Ordner: C:\Program Files\Sony\Vegas Pro 13.0\FileIO Plug-Ins\compoundplug
  Format: MPEG-2 Transport Stream
  Version: Version 13.0 (Build 453) 64-bit
  Firma: Sony Creative Software Inc.

I suspect Vegas isn't looking for AAC audio in an "Typ: MPEG-2 Transport Stream". Since there is only one video and one audio stream, I'd try the easy method and just change the extension of the file from .ts to .mp4 and see how Vegas interprets it.

If that doesn't work:

1) you haven't lost anything

2) Upload a short file of that type to an online file share, post the download link and someone will help you choose the best tool to re-wrap it to .mp4.

simply renaming them to .mp4 didn't help.

Here is an example. You can play it with sound in VLC but not in Vegas:
http://www.mpeters.de/temp/test.ts

I used XMedia Recode as advised by Nick in section 5. here. SVP 13 and MVMSP 14 (latest builds) opened with audio as well. Win10Pro.

> SVP 13 and MVMSP 14 (latest builds) opened with audio as well

you mean, SVP13 opened the file with audio as is? I have build 453, which one do you use?

As mentioned, after using XMedia Recode SonyVP 13 (last SCS build, 453) opened the file with audio.

Cornico had success with Handbrake.

It worked with Handbrake. Many thanks everybody! I have 55 .ts files now in Vegas - with sound, and each one 30 seconds long.

Next little problem: the sound is almost but not quite synced with the images. The difference is so small that I don't notice it while watching but - the final moment of each snippet is silent, just a fraction of a second. When stitching the snippets together, there is a tiny silent moment in music and speech, like a glitch that is audible.

Is there a way to automatically push all snippets together a little bit so that they overlap? that would take care of the silent moment. I could do that manually but can it also done per command somehow?

michael, you might want to create a new Post for your "next problem", it'll get noticed better.