Premiere Pro doesn't play AC3 audio stream from .MTS file I have video clips from two cameras. They were recorded in AVCHD, which I've imported as .MTS in Adobe Premiere Pro.

The clips taken from one camera works fine. The others don't play audio.

I've investigated into the complimenting .xmp files, and realized the following string was missing from those without audio:

 xmpDM:audioSampleType="Compressed"


When I open these AVCHD videos in Quicktime, they work perfectly fine with audio.

How do I fix this and make audios from the video clips play in Premiere Pro?

Edit: Here's what I got from MediaInfo.

From the video clip that plays audio:

General
ID : 0 (0x0)
Complete name : /Volumes/LACIE 3TB/Film Projects/Anime Salon/001_clannadas/footage/front/AVCHD/BDMV/STREAM/00000.MTS
Format : BDAV
Format/Info : Blu-ray Video
File size : 73.4 MiB
Duration : 25s 491ms
Overall bit rate mode : Variable
Overall bit rate : 24.1 Mbps
Maximum Overall bit rate : 24.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Format settings, GOP : M=2, N=15
Codec ID : 27
Duration : 25s 459ms
Bit rate mode : Variable
Bit rate : 21.6 Mbps
Maximum bit rate : 22.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.348
Stream size : 65.5 MiB (89%)

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : PCM
Format settings, Endianness : Big
Format settings, Sign : Signed
Muxing mode : Blu-ray
Codec ID : 128
Duration : 25s 525ms
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 4.67 MiB (6%)

Text
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Duration : 24s 960ms


From the video clip that doesn’t play audio:

General
ID : 0 (0x0)
Complete name : /Volumes/LACIE 3TB/Film Projects/Anime Salon/001_clannadas/footage/closeup/AVCHD/BDMV/STREAM/00001.MTS
Format : BDAV
Format/Info : Blu-ray Video
File size : 131 MiB
Duration : 48s 967ms
Overall bit rate mode : Variable
Overall bit rate : 22.5 Mbps
Maximum Overall bit rate : 24.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Format settings, GOP : M=2, N=15
Codec ID : 27
Duration : 48s 982ms
Bit rate mode : Variable
Bit rate : 21.3 Mbps
Maximum bit rate : 22.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.343
Stream size : 124 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 : 49s 56ms
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 1.50 MiB (1%)

Text
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Duration : 48s 483ms


It appears that recording format is different, PCM (playing) vs AC-3 (not playing).
It sounds like there is a problem with your Dolby Decoder for the AC3 audio stream.  If you are on a trial or pirated copy then you may not have been able to activate the AC3 decoder that normally comes with Premiere. (Adobe has to pay Dolby for each copy used.)  If you are on a legit copy, something may have become corrupt with the Dolby decoder.  Try doing a deactivation of Premiere (Help...Deactivate) on your system and reactivate and see if it manages to activate the Dolby Decoder.