It's back -- short DVD buzz on scene changes?
#1
At some DVD scene changes, there is a short (less than 1 second) buzz. This seems to fit a description of a bug that was apparently fixed some on 11/17/13: http://trac.kodi.tv/ticket/14313 and http://forum.kodi.tv/showthread.php?tid=161109.

On my current setup, Kodi 15.0 Beta 2 ( OS-X 10.10.3), with "The Last of the Mohicans" the annoying buzz occurs with AC3 5.1 and AC3 stereo, but with DTS 5.1 there is sometimes a barely noticeable thump or dropout (no buzz) at the same location. It's hard to detect and easy to ignore.

Here is the log around the time a buzz occurred at 16:29:33:

Code:
...
16:29:21 T:4504133632   DEBUG: GetAEChannelMap mapped channels to layout FL,FR
16:29:21 T:4504133632   DEBUG: Initialize: using buffer size: 16384 (0.042667 ms)
16:29:21 T:4504133632   DEBUG: CActiveAESink::OpenSink - DARWINOSX Initialized:
16:29:21 T:4504133632   DEBUG:   Output Device : Default
16:29:21 T:4504133632   DEBUG:   Sample Rate   : 48000
16:29:21 T:4504133632   DEBUG:   Sample Format : AE_FMT_FLOAT
16:29:21 T:4504133632   DEBUG:   Channel Count : 2
16:29:21 T:4504133632   DEBUG:   Channel Layout: FL,FR
16:29:21 T:4504133632   DEBUG:   Frames        : 512
16:29:21 T:4504133632   DEBUG:   Frame Samples : 1024
16:29:21 T:4504133632   DEBUG:   Frame Size    : 8
16:29:21 T:4503597056   DEBUG: CActiveAE::ClearDiscardedBuffers - buffer pool deleted
16:29:21 T:4583903232   DEBUG: Previous line repeats 1 times.
16:29:21 T:4583903232   DEBUG: CDVDPlayerAudio::HandleSyncError - average error -17279.223285 below threshold of 50000.000000
16:29:26 T:4405596160   DEBUG: DVDNAV_CELL_CHANGE (HOLDING)
16:29:26 T:4431110144   DEBUG: CPullupCorrection: detected pattern of length 2: 33366.75 50049.92, frameduration: 41708.333333
16:29:26 T:4405596160   DEBUG: ProcessBlock - Cell change: Title 1, Chapter 1
16:29:26 T:4405596160   DEBUG: ProcessBlock - At position 0% inside the feature
16:29:26 T:4405596160   DEBUG: DVDNAV_CELL_CHANGE
16:29:26 T:4405596160  NOTICE: Opening stream: 1 source: 256
16:29:26 T:4405596160    INFO: ParseRLE - ignoring blank alpha palette, using default
16:29:26 T:4405596160   DEBUG: CDVDPlayer::ProcessSubData: Got complete SPU packet
16:29:26 T:4405596160  NOTICE: Opening stream: 8 source: 256
16:29:26 T:4405596160   DEBUG: CDVDPlayer::HandleMessages - player started 1
16:29:33 T:4583903232   ERROR: ffmpeg[11138D000]: [ac3] incomplete frame
16:29:33 T:4583903232   ERROR: ffmpeg[11138D000]: [ac3] frame sync error
16:29:33 T:4583903232   ERROR: CDVDPlayerAudio::DecodeFrame - Decode Error. Skipping audio packet (-1094995529)
16:29:33 T:4583903232   DEBUG: CDVDPlayerAudio::Process - Decode Error
16:29:33 T:4405596160   DEBUG: CDVDPlayer::HandleMessages - player started 1
16:29:37 T:140735295419136   DEBUG: ------ Window Init (Pointer.xml) ------
16:29:37 T:140735295419136   DEBUG: ------ Window Init (VideoOSD.xml) ------
16:29:38 T:140735295419136   DEBUG: ------ Window Deinit (Pointer.xml) ------
16:29:38 T:140735295419136   DEBUG: ------ Window Init (Pointer.xml) ------
16:29:39 T:140735295419136   DEBUG: ProcessMouse: trying mouse action left click
...

Is anyone else noticing this?

dgktkr
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#2
this looks like a corrupted stream as of the ffmpeg errors. Lets see if anyone else has this kind of problems (i for myseld don't...).
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
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#3
Yes, I have this problem as well. I have verified it on Kodi 14.0 and Kodi 14.2. It is repeatable. It is occurring on two Windows 7 Ultimate SP1 boxes (both 32 and 64 bit), and also an ATV2. The movie is a straight rip from a DVD (no compression), maintaining the VIDEO_TS structure on hard drive, i.e. I am playing the VIDEO_TS.IFO file. One of the Windows 7 boxes (64 bit) is running Kodi 14.2 (March 26, 2015) installation with VIDEO_TS files local, and using onboard sound.

10:25:41 T:3980 ERROR: ffmpeg[F8C]: [ac3] incomplete frame
10:25:41 T:3980 ERROR: ffmpeg[F8C]: [ac3] frame sync error
10:25:41 T:3980 ERROR: CDVDPlayerAudio:Big GrinecodeFrame - Decode Error. Skipping audio packet (-1094995529)
10:25:41 T:3980 DEBUG: CDVDPlayerAudio:Tonguerocess - Decode Error
10:25:41 T:4564 DEBUG: CDVDPlayer::HandleMessages - player started 1

This problem does not present itself in VLC, using the same files. The problem is also occurring in other ripped DVDs

I have also updated my graphics and sound drivers to the latest.
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#4
Anyone?
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#5
Happens to me since XBMC 11. Always on chapter changes. Both with original or ripped DVDs
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#6
Is there anyone on the development team that can look into this, or some way to get this issue investigated?
Any help would be appreciated.
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#7
It seems highly dependend to the used audio equipment. Unlikely that this will be solved without someone in the team having the same problem. (which is not the case i think).
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
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#8
Thank you- but this issue is also occuring on PCs that are not connected to external audio equipment. The issues do show up in the log files as skipping packets. The same video files can be played in VLC without issue. It is not an isolated issue (i.e. a single movie). It occurs on multiple ripped DVDs (recent and older).
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#9
Can you somehow provide a short sample (50 - 100 MB) via dropbox which shows this behavior?
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
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#10
I am currently traveling, but can upload whatever is required when I return (Thursday). Unfortunately, I think i would need to upload an entire ripped DVD structure (5G+) to be evaluated. Unless you are just looking for a short audio snip of what it sounds like when the issue occurs-

Please advise-
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#11
No we need a short sample which shows the error (maybe cut out with some video editing tool or so). We are not interested in 5G samples or in a recording of the "blipp" sadly Wink
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
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#12
Unfortunately, I know of no tools which would allow me to cut a piece of video/audio out of a full DVD (VIDEO_TS) file structure, and store it in a DVD file structure. All tools i know of will extract pieces of the video/audio, and transcode, etc (create .avis, etc). Hence the video and audio streams will be modified.

Since this problem (for me) is only apparent on playing ripped full DVD file structures, I think you will need the full unmodified full-DVD file structure to best try to reproduce. Unfortunately, these are in the GB size range-

I dont know of any other way to recreate with a small sample-
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#13
And thank you for looking into this- it has been driving me crazy.
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#14
are you sure your dvd reader isn't flawed? Do you have a different pc where you could try to rip a dvd?
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS (wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf (wiki)
READ THE IOS FAQ!: iOS FAQ (wiki)
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#15
Good point- I will verify by ripping on another DVD drive.
As anothrt point, I believe another user (in this thread) stated that this happens to him while playing physical DVDs.
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It's back -- short DVD buzz on scene changes?1