Have to Cycle audio tracks for corret playback

by ged325 Fri Jul 25, 2014 8:18 am

Hi All,

On some of the larger MKV files that I'm playing through MPC I need to cycle through the audio tracks in order for the playback to work correctly. It seems like the video is on fast forward when I first play it. Switching between the secondary track and then back to the main track fixes it.

I'm running on a Windows 7 box using the mega 10.6 K-Lite codec pack.

It's not a big deal to switch between the tracks but just wondering if there's a way that I can get it working on first load?

Thanks in advanced.

by **Admin** Fri Jul 25, 2014 9:05 pm

Did you perhaps enable S/PDIF or HDMI passthrough?

Can you post a MediaInfo log for one of those MKV files? I assume the audio tracks have different audio formats.

by ged325 Sat Jul 26, 2014 8:05 am

Thanks for the reply. I'm hoping this is what you meant by the media info log. If not please provide instructions (I'm brand new to all of this).

Definitely not using HDMI pass through or S/PDIF.

It looks like I'm getting JITTER (I found in the ffdshow audio decoder).

The other thing I noticed from the decoder was that the output changes from 16 bit integer to 32 bit float. Is there a way to set that as the default?

Thanks again for the help.

General
Format : Matroska
Format version : Version 4 / Version 2
File size : 5.61 GiB
Duration : 54mn 31s
Overall bit rate mode : Variable
Overall bit rate : 14.7 Mbps
Encoded date : UTC 2014-02-15 17:05:28
Writing application : mkvmerge v6.7.0 ('Back to the Ground') 64bit built on Jan 8 2014 15:10:52
Writing library : libebml v1.3.0 + libmatroska v1.4.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 54mn 31s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Language : English
Default : Yes
Forced : No

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Format profile : MA / Core
Mode : 16
Format settings, Endianness : Big
Codec ID : A_DTS
Duration : 54mn 31s
Bit rate mode : Variable
Bit rate : Unknown / 1 509 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossless / Lossy
Language : English
Default : Yes
Forced : No

Text #1
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Language : English
Default : Yes
Forced : No

Text #2
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Language : English
Default : No
Forced : No

Text #3
ID : 5
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : French
Default : No
Forced : No

Text #4
ID : 6
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Spanish
Default : No
Forced : No

Text #5
ID : 7
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Spanish
Default : No
Forced : No

Text #6
ID : 8
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Portuguese
Default : No
Forced : No

Text #7
ID : 9
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Polish
Default : No
Forced : No

Text #8
ID : 10
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Dutch
Default : No
Forced : No

Text #9
ID : 11
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Danish
Default : No
Forced : No

Text #10
ID : 12
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Finnish
Default : No
Forced : No

Text #11
ID : 13
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Norwegian
Default : No
Forced : No

Text #12
ID : 14
Format : PGS
Muxing mode : zlib
Codec ID : S_HDMV/PGS
Codec ID/Info : The same subtitle format used on BDs/HD-DVDs
Language : Swedish
Default : No
Forced : No

Menu
00:00:00.000 : en:00:00:00.000
00:00:06.006 : en:00:00:06.006
00:05:06.556 : en:00:05:06.556
00:12:28.247 : en:00:12:28.247
00:18:51.547 : en:00:18:51.547
00:26:45.854 : en:00:26:45.854
00:35:24.372 : en:00:35:24.372
00:43:18.304 : en:00:43:18.304
00:53:11.730 : en:00:53:11.730

by **Admin** Sun Jul 27, 2014 4:24 pm

No, jitter is something else.

It is strange that it switches from 16-bit to 32-bit float, because 32-bit float is disabled by default in ffdshow. Perhaps it switches to a different decoder, such as LAV Audio?

How are you toggling the audio? Because the file contains just one audio track. To be precise, it contains a DTS Master Audio track, with a DTS core. The DTS core should get decoded, since DTS-MA is not supported by default.

My suggestions at this point:
1) Update your sound driver
2) Disable DTS in ffdshow audio decoder. Then LAV Audio decoder should get used instead.

If you can give me the filename of this particular file, then I can download the same file and test it. Similar files I have here play fine, with any combination of splitters/decoders from the pack.

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