Audio and video stuttering
#1
I am experiencing frequent problems when playing back certain .ts-files. Every few seconds the audio stops, and the video is lagging a lot.

This problem only appears in XBMC, and play fine in MPC-HC. It has been present for the last few versions of XBMC (I think the problem first appeared with 12). I also tried the 14 Alpha, and the problem is still present there. It is a bit annoying the have to use an alternative player every time I want to watch these files, and I am sad to see it is still present in 14.

Is this a known problem? Here's the media-info from MPC-HC:
Code:
General
ID                             : 16389 (0x4005)
Format                         : MPEG-TS
File size                      : 182 MiB
Duration                       : 4mn 16s
Overall bit rate mode          : Variable
Overall bit rate               : 5 957 Kbps

Video
ID                             : 4099 (0x1003)
Menu ID                        : 33409 (0x8281)
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : [email protected]
Format settings, CABAC         : Yes
Format settings, ReFrames      : 4 frames
Codec ID                       : 27
Duration                       : 4mn 16s
Bit rate mode                  : Variable
Bit rate                       : 5 517 Kbps
Maximum bit rate               : 20.0 Mbps
Width                          : 1 440 pixels
Height                         : 1 080 pixels
Display aspect ratio           : 16:9
Frame rate                     : 29.970 fps
Standard                       : Component
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Interlaced
Bits/(Pixel*Frame)             : 0.118
Stream size                    : 168 MiB (93%)
Color primaries                : BT.709
Transfer characteristics       : BT.709
Matrix coefficients            : BT.709

Audio
ID                             : 4163 (0x1043)
Menu ID                        : 33409 (0x8281)
Format                         : AAC
Format/Info                    : Advanced Audio Codec
Format version                 : Version 2
Format profile                 : LC
Muxing mode                    : ADTS
Codec ID                       : 15
Duration                       : 4mn 16s
Bit rate mode                  : Variable
Bit rate                       : 144 Kbps
Channel(s)                     : 2 channels
Channel positions              : Front: L R
Sampling rate                  : 48.0 KHz
Compression mode               : Lossy
Delay relative to video        : 73ms
Stream size                    : 4.39 MiB (2%)

I can provide the file with the problem if necessary.
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#2
Did you ever read this?

http://wiki.xbmc.org/?title=External_players

So you aren´t in need to switch the player manually...xbmc will do this for you

Providing the file (via dropbox or anything) would be fine, for others to test. But what is neccessary, I think, is a Debug Log while playing that file to see, if something goes wrong on your system.

Greetings
David
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#3
Yes, I can provide the logfile. The log seems to contain a lot of irrelevant information regarding thumb extraction from other files in the folder, but I left it there for a complete log. To find the relevant file playback search for Bicycle Race. The log is from Kodi 14, but problem is present in all version since at least XBMC 12. I've tested on several different computers as well, so I doubt it is related to hardware. I've tested it on computers with nVidia, Amd and Intel in the past.

http://xbmclogs.com/show.php?id=267655

I'd prefer to not have to use an external player, but it is what I'm doing currently. But as it seems to be somewhat random (from a user perspective) what files have this issue, I have to try to play it, then stop it and change player if the problem occurs. I really like the OSD in XBMC, and I'd like to have it for all my files.

Here's a link to the file if anyone want's to try for themselves. https://mega.co.nz/#!wI5iTSoK!3bNJDPX6Qw...mp-T97jM0o
As far as I know only XBMC is having problem playing back the file. I have several other music videos with this problem as well.
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#4
Is there no one who can tell me what the problem is?
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#5
The problem is that timestamps are jumping back. We are working on this. This patch makes your sample play: https://github.com/popcornmix/xbmc/commi...ec7feb5510
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#6
Maybe a dev could take a look into this logifle....I never saw that many "ffmpeg" errors in a logfile.

Do you record these files for yourself from tv? Do you run into problems while playing back DVD or BD?

I will download this file and test it, as soon as I can.
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#7
Allright, nice to know it's being looked into. Makes me very happy. Smile


I don't record them myself. And I have no problems with DVDs or BDs, as far as I know at least.
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#8
And were did you get them from? Did you rip them in .ts files?

Maybe the files are broken.
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#9
The files are 'broken' in a sense that the timestamps are jumping back. We have seen this in some DVDs so there is work being done to fix it as it is not restricted to a wrong rip and not easily fixed by a typical user
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#10
Yeah, I looked through my files to see if I could find any patterns and it looks like all the files I have with this problem are from the same TV channel. I don't know if it's the stream they use or if whoever ripping it is doing something "wrong".

I just get them from torrents, I don't really know much more about the files.
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