Choppy DTS performance

[jshooter]

Hi, I've just bought an onkyo receiver and plugged it to my mac mini core duo 1.83 -2Gb ram- via optical output. I can play DTS/DD5.1 dvds in dvd player with no problem, but in VLC -0.86a and last nightly build- when I play a mkv with DTS, sound is unstable, choppy, with lots of pauses while image -720p- is perfect.
I have encoded output selected and my receiver detects dts signal but with those problems.

Any idea on how i can fix it -if it is possible-

Thanks and regards!

[jshooter]

Here there is an example: http://rapidshare.com/files/24462889/ca ... s.3gp.html

Regards

[firewire_666]

Same here. Both OSX and Windows Builds on different maschines.
If i switch to analog mode, everything is ok - but S/P-DIF out - stuttering

[tretneo]

I am having this same problem. When I turn off optical audio and go back to analog I have no problems.

Mac Mini Intel Core Duo 1.83 / 1GB Ram
Mac OS X 10.4.9
VLC 0.8.6b

mkv file w/ DTS audio

I have tried a couple of sample .vob files with DTS audio and they work just fine w/ DTS over optical.

Has anyone found a resolution for this issue w/ optical DTS audio in .mkv videos.

Robert

[enriqueeeee]

I have the exact same problem

I have tryed multipe Video players i found one that some times plays the file
but with no Video just sound.


i have a harman kardon receiver and 'm using optical out
when with vlc the receiver sees the signal as Dts and or dolbi digital but the sound isnt what it should be.


if one of the programmers or testers needs one of the files which gives the problem i have one that is about 30 MB just email me and i'll send it to you


If some one knows a alternative program for me please say so.

[viper][magic]

I have the same problem, however it is with the windows xp OS.

It is interesting though. When I try and play some .mkv files with DTS some are just fine, and some with DD are fine as well. However it seems to be with the higher quality .mkv files I have that seem to have this severe stuttering problem. Could it be the quality is too high? I know the DTS library that is being used for VLC isn't entirely complete.

http://www.videolan.org/developers/libdca.html

"None of the extensions (extra channels, 96/192kHz sample rates) have been implemented (and unfortunately the public standard provides only minimal information on them)."

So it could be that we're all playing too high a quality DTS signal

[emuguy37]

Higher quality mkv's may be the problem on my end too. My 720p DTS files play fine, but 1080p and DTS seems like it's too much for VLC to handle...?

The files play fine when just sending the audio out my iMac's speakers, but once I go audio out to the receiver, it's choppy as described in this thread.

[LarrikinAus]

I have the same problem (didn't see this thread and opened a new one viewtopic.php?t=38508).

I try and play H.264 files with DTS sound (on mac mini intel OSX via VLC) and DTS playback via SPDIF is choppy and unbearable - this is using the latest VLC for OSX Intel. Appears to be a bug in the VLC software. Anyone know if they have this down as an official bug to fix?

Dolby Digital works fine, it is just DTS that has this problem.

[pellucidity]

I am curious, based on that page, why VLC can't output the bitstream, unmodified, to SPDIF correctly. I would have assumed that was less complex than decoding.

[JLOcioso]

Just to move this topic.... I've the same problem, with some movies with DTS and MKV.....
Dolby Digital work ok on all my movies, DTS just some.... all of them are about 8gb, but i've some in the same configuration (720p, ~8gb, DTS) without the problem.....

[superjunior]

For me it's the DTS tracks encoded at approx 1.5 mbps that is choppy.
I guess it's the same for everyone else.

[wedge]

I have the same problem with 1.5mbps dts files. I've tried with the latest nightly snapshot (30oct) and the sound stutters with spdif, normal output is fine. An example file can be found here: http://www.mediafire.com/?ann04oymtb2

[Ayla]

Same problem here (OS 10.5).

Any solution?

[sphereboy]

Same problem here! Let's see if enough of us scream this problem will be addressed.
I have a brand new 40" Samsung and am dying to test out some 1080 content w/ DTS but VLC is not working out. Same exact problem as stated above by so many users.

[Ayla]

I'm using the latest MPlayer, link is in the other dts thread, for all my 1.5Mb DTS movies.

It works perfectly!

Actually MPlayer seems at least as good as VLC, so I'm considering changing for all my movie watching.

/Martin

[Jean-Baptiste Kempf]

Pierre is working on this DTS/SPDIF problem.

MPlayer and VLC use the same ffmpeg codecs for H264 reading, so the stuttering due to one core peak won't help.

[Kalotripa]

Hi All,

I had the same problem and finally I fixed it. It may help others!! I use Media player classic, I right click on the screen and enter properties. I then select 'Playback filters' shown on the right side. From here I untick DTS in Transform filters..
I also unticked the AC3. Although I did not have any issues with AC3.. Wola! I now get perfect DTS. Not a single drop out.... Hope this helps.

Cheers
George

[theflo7]

I got the same problems, just bought a full HD beamer and was dying to watch some .mkv movies with DTS track but this was a major bummer!!!
The picture plays very choppy.
Is anyone of the developers reading this topic? Or should we all change to other options?

Can somebody tell me if a nightly build is working with DTS?

Greetings and thanx in advance,

theflo

[gmedding]

Try disabling DTS Dynamic Range Compression. The setting is in Preferences > Input / Codecs > Audio Codecs > DCA. That worked for me (on Mac OS).

If you still need the dynamic range compression, and you are running digital out to a receiver (or sound processor), it might support dynamic range compression on its own and do a better job of it.

[cypher007]

did anyone ever fix this problem for windows?

[steen]

I would like to know as well if this has been fixed. I either cannot get passthrough or this same problem with the stuttering.

Are there ANY knowledgable/admins/tech support reading these threads?

Thanks

[bitonio]

Same problem here

Sound is choppy. Small silence <1 sec occurs every 5/10 minutes.

• Media: MKV file, Audio codec a52, 5 channels, 48 Khz, 640 kb/s
• Machine: MacBook Pro 2.16Ghz Core2Duo with 2 GB RAM, MacOS 10.5.5 and now 10.5.6
• VLC 0.98 Grishenko Intel
• Audio receiver 5.1/DD and DTS compliant connected with the internal jack optical SPDIF MacBookPro output.

I tried:
- play with faster harddisk than the internal (same result)
- increase the input buffer

Log messages (not sure it happens exactly with the silence happens)

main debug: audio output is starving (32042), playing silence

I googled and search here, some some clue but nothing very clear.
Is this a very old defect?
Is this related to the atmo explanation about Dual Core on ticket 492?

I would be glad to help the one that would be able to take care of that bug.

[fangji]

I have the same problem, however it is with the windows xp OS.

It is interesting though. When I try and play some .mkv files with DTS some are just fine, and some with DD are fine as well. However it seems to be with the higher quality .mkv files I have that seem to have this severe stuttering problem. Could it be the quality is too high? I know the DTS library that is being used for VLC isn't entirely complete.

[HarmanKardon]

I had this problem as well, fixed it by downloading the newest VLC - why didn't I think of that before I messed with all the settings?