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Old 13th April 2011, 15:48   #1  |  Link
Atomix77
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MKV playback extremely fast

Hello,
Lately I have been having a major problem with .mkv files. The playback has gotten extremely fast.
Video is jumping forward and playing at a very fast rate,
I searched for a while, if someone else has had this kind of problem, but all I could find is a solution to mp3 files, not mkv.
I tried the same mkv files with every media player I have installed. The thing is - not all mkv files have this problem, only like every 5th out of 100.
How can I fix this? What seems to be the cause?
Thanks
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Old 13th April 2011, 16:05   #2  |  Link
sneaker_ger
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Run media info on the files with the problem and on the files without and compare them. Could be they are using different formats (e.g. VC-1 vs. H.264). Also try a different player/splitter/decoder.
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Old 13th April 2011, 16:29   #3  |  Link
Ghitulescu
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Quote:
Originally Posted by Atomix77 View Post
Hello,
Lately I have been having a major problem with .mkv files. The playback has gotten extremely fast.
Video is jumping forward and playing at a very fast rate,
I searched for a while, if someone else has had this kind of problem, but all I could find is a solution to mp3 files, not mkv.
I tried the same mkv files with every media player I have installed. The thing is - not all mkv files have this problem, only like every 5th out of 100.
How can I fix this? What seems to be the cause?
Thanks
Did you followed the same procedure in obtaining the 5% and the 95%?
Are those SD, HD, which codec?
Are the time codes ok?
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Old 13th April 2011, 16:39   #4  |  Link
Atomix77
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Quote:
Originally Posted by Ghitulescu View Post
Did you followed the same procedure in obtaining the 5% and the 95%?
Yes, I followed the same procedure.

Here are the mediainfo files:

File No.1 (playback too fast)

Code:
General
Format                           : Matroska
File size                        : 1.09 GiB
Duration                         : 42mn 20s
Overall bit rate                 : 3 698 Kbps
Writing application              : x264.exe
Writing library                  : mkv2rls x264-tv version built on 2011. febr. 17

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L3.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 3 frames
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 42mn 19s
Bit rate                         : 3 307 Kbps
Width                            : 1 280 pixels
Height                           : 720 pixels
Display aspect ratio             : 16:9
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.150
Stream size                      : 981 MiB (88%)
Writing library                  : x264 core 88 r1471 1144615
Encoding settings                : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=30 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=6 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=1 / wpredb=1 / wpredp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=3307 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language                         : English

Audio
ID                               : 2
Format                           : AC-3
Format/Info                      : Audio Coding 3
Mode extension                   : CM (complete main)
Codec ID                         : A_AC3
Duration                         : 42mn 20s
Bit rate mode                    : Constant
Bit rate                         : 384 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Bit depth                        : 16 bits
Compression mode                 : Lossy
Stream size                      : 116 MiB (10%)
Title                            : English
Language                         : English

Text
ID                               : 3
Format                           : UTF-8
Codec ID                         : S_TEXT/UTF8
Codec ID/Info                    : UTF-8 Plain Text
Title                            : English
Language                         : English
File No. 2 (Playback too fast)

Code:
General
Format                           : Matroska
File size                        : 696 MiB
Duration                         : 1h 58mn
Overall bit rate                 : 819 Kbps
Encoded date                     : UTC 2011-04-02 12:58:37
Writing application              : mkvmerge v3.2.0 ('Beginnings') built on Feb 12 2010 16:46:17
Writing library                  : libebml v0.7.9 + libmatroska v0.8.1

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L4.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 5 frames
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 1h 58mn
Nominal bit rate                 : 777 Kbps
Width                            : 1 280 pixels
Height                           : 528 pixels
Display aspect ratio             : 2.40:1
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.048
Writing library                  : x264 core 60 r900 a9af942
Encoding settings                : cabac=1 / ref=5 / deblock=1:1:2 / analyse=0x3:0x133 / me=umh / subme=7 / brdo=1 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=0 / threads=3 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / bime=1 / keyint=250 / keyint_min=25 / scenecut=45(pre) / rc=2pass / bitrate=777 / ratetol=1.0 / rceq='blurCplx^(1-qComp)' / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=50000 / vbv_bufsize=50000 / ip_ratio=1.40 / pb_ratio=1.30 / aq=0

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format profile                   : HE-AAC / LC
Codec ID                         : A_AAC
Duration                         : 1h 58mn
Channel(s)                       : 2 channels
Channel positions                : Front: L R
Sampling rate                    : 48.0 KHz / 24.0 KHz
Compression mode                 : Lossy

Text
ID                               : 3
Format                           : UTF-8
Codec ID                         : S_TEXT/UTF8
Codec ID/Info                    : UTF-8 Plain Text

Menu
00:00:00.097                     : en:00:00:00.097
File No.3 (Playback OK)

Code:
General
Format                           : Matroska
File size                        : 1.74 GiB
Duration                         : 43mn 58s
Overall bit rate                 : 5 660 Kbps
Encoded date                     : UTC 2010-07-24 06:48:59
Writing application              : mkvmerge v4.0.0 ('The Stars were mine') built on Jun  6 2010 16:18:42
Writing library                  : libebml v1.0.0 + libmatroska v1.0.0

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L4.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 5 frames
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 43mn 58s
Bit rate                         : 4 907 Kbps
Width                            : 1 600 pixels
Height                           : 900 pixels
Display aspect ratio             : 16:9
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.142
Stream size                      : 1.51 GiB (87%)
Writing library                  : x264 core 98 r1643 59a9e03
Encoding settings                : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=19.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / vbv_maxrate=50000 / vbv_bufsize=50000 / crf_max=0.0 / ip_ratio=1.40 / aq=1:1.00 / nal_hrd=none
Language                         : English

Audio
ID                               : 2
Format                           : AC-3
Format/Info                      : Audio Coding 3
Mode extension                   : CM (complete main)
Codec ID                         : A_AC3
Duration                         : 43mn 58s
Bit rate mode                    : Constant
Bit rate                         : 640 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Bit depth                        : 16 bits
Compression mode                 : Lossy
Stream size                      : 201 MiB (11%)
Language                         : English
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Old 13th April 2011, 16:49   #5  |  Link
sneaker_ger
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Nothing real special about the files. What player are you using?
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Old 13th April 2011, 16:55   #6  |  Link
Atomix77
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The problem seems to be connected with MPC player. I tried installing VLC player, and the video plays back just normally, however, I want to keep using MPC player with MadVR renderer, because the quality is really noticeable between MPC with MadVR and standard VLC player.
Why is that I can playback like thousands (not exaggerating) video files (including MKV format) with MPC MadVR and have absolutely no problem, but every now and then like 5% of mkv files are having this playback problem?
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Old 13th April 2011, 17:17   #7  |  Link
Atomix77
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Okay, I found a solution -
I enabled matroska internal filter. In MPC player: Options->Internal Filters->Matroska checkbox
But does this mean that I will experience lower quality because of an internal filter?
Any other way to fix this?
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Old 13th April 2011, 18:22   #8  |  Link
sneaker_ger
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Quote:
Originally Posted by Atomix77 View Post
Okay, I found a solution -
I enabled matroska internal filter. In MPC player: Options->Internal Filters->Matroska checkbox
But does this mean that I will experience lower quality because of an internal filter?
No, a splitter has no influence on the quality at all. It just reads the tracks out of a container and passes them onto the appropriate decoders.
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Old 13th April 2011, 18:39   #9  |  Link
pirlouy
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Maybe you were just awaking and like you were tired, you though it was fast. Just a guess.
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Old 9th August 2011, 16:14   #10  |  Link
popper
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not sure if its related to this problem but it seems mkv2rls default settings at least are to blame for some STBs and related WDTV USER playback problems etc

namely the apparent default "audio sampling frequency" setting of "0" rather than the real Sampling rate : 48.0 KHz.


i came across this working fix while looking into a current FFMpeg re-encoding for streaming test with the bad mkv2rls audio setting stopping ffmpeg in its encoding tracks.

even though the original mkv file seems to play fine on most SW players, and its a hard problem to notice the wrong default settings i thought id mention it here so other Google searches find the mkv2rls reference and potential libebml v0.7.9 + libmatroska v0.8.1 problems and fix easily.

C.O jimmyjazzz a WDTV USER
"Files written with mkv2rls are now notorious for having audio problems. The reason for the problem stems from an apparent default "audio sampling frequency" setting of "0". This setting needs to be changed to the correct setting before the file can work properly.

Running your .mkv file through MediaInfo will show the proper audio sampling frequency.

MediaInfo example:

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 51mn 36s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 142 MiB (10%)
Title : English
Language : English

To change the audio sampling frequency to the correct setting, we will use the MKVMerge (mkvmerge GUI) software. The latest build is mkvmerge GUI v4.9.1

You can get it here: http://www.bunkus.org/videotools/mkv...downloads.html

Once downloaded, install the MKVMerge software by opening the mkvtoolnix-unicode-4.9.1-setup.exe (there's a portable version available as well that requires no installation).

When you're asked if you want a shortcut placed on your desktop, click "Yes". You can always move it to where you want later.

Once installed:

1) Open MKVMerge (mkverge GUI)
2) Click on "File" (top left hand corner)
3) Click on "Header editor"
4) In the "Header editor" window, click on "File" once again
5) Click on "Open" to find/choose the IMMERSE .mkv file (it could take a few seconds to open)
6) Once it opens, click on the "+" just to the left of "Audio track 2"
7) In the drop-down menu, highlight "Audio sampling frequency"
8) In the window to the right, change the "current value" from 0 to 48000
9) Click on "File" again
10) Click on "Save" (it could take a few seconds to save)
11) Click on "Quit"
12) Close MKVMerge (mkverge GUI)

**If, for some reason, the file still does not play after applying the fix, you can try remuxing it**

How to remux a file with MKVMerge:

1) Open MKVMerge (mkvmerge GUI)
2) Click on "Add" to find your file.
3) In the "Tracks, chapters and tags" box, highlight the first line (V_MPEG4/ISO...)
4) After highlighting the line, click on the "Extra options" tab just below.
5) On the "Compression" line, open the drop down menu and make sure "None" is entered. This is very important.
6) In the "Tracks, chapters and tags" box, highlight the second line (A_AC3...)
7) Follow steps 4-5 again
8) The new file will be in the same directory as the original file, but will now have a (1) appended to the file name.
9) Click on "Start muxing", found at bottom left.

The muxing should take between 5-30 minutes max., depending on your computer. If you need to, disable any other CPU-intensive applications during this time -- the muxing will go faster.

Hope this helps.

JJ
"

BTW what is this "mkv2rls x264-tv version" version built on 2011. febr. 17 Writing library app ? id never heard of it before todays problem and fix

Last edited by popper; 9th August 2011 at 19:02.
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Old 9th August 2011, 17:17   #11  |  Link
jj666
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MKV2RLS is a muxer used by pirate groups isn't it? If so, I guess this post is a rule six violation.

Cheers,

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Old 9th August 2011, 18:00   #12  |  Link
nevcairiel
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That sounds like fishing. Pirates also use x264 to encode their releases, its now also illegal to talk about it?
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Old 9th August 2011, 18:03   #13  |  Link
Ghitulescu
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Quote:
Originally Posted by nevcairiel View Post
That sounds like fishing. Pirates also use x264 to encode their releases, its now also illegal to talk about it?
No, but rule 6 prevents the discussions on all media that is not legally obtained. Since the user had no idea what muxer/encoder has been used, it follows that he didn't encode/mux the file himself, and this falls under rule 6.
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Old 9th August 2011, 18:20   #14  |  Link
jj666
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Quote:
Originally Posted by nevcairiel View Post
That sounds like fishing. Pirates also use x264 to encode their releases, its now also illegal to talk about it?
No, I mean the muxer, not the codec. Try googling MKV2RLS, it's not seemingly available for download anywhere, and all mention of it seems to be people having problems with their scene encodes.

Fishing, or stating the bloody obvious, whichever works :-)

Cheers,

-jj-
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Old 9th August 2011, 19:04   #15  |  Link
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you can probably also remux the file with the latest mkvmerge to fix the issue, though it seems easier to just use a different splitter (lav splitter is a great one btw)
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Old 10th August 2011, 06:07   #16  |  Link
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Quote:
Originally Posted by Ghitulescu View Post
No, but rule 6 prevents the discussions on all media that is not legally obtained. Since the user had no idea what muxer/encoder has been used, it follows that he didn't encode/mux the file himself, and this falls under rule 6.
Actually, unless he admitted to downloading a warez release, there's no way for you to know if it was illegal or not since some countries still allow copies among friends. Also, who died and made you mod?
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Last edited by Chetwood; 10th August 2011 at 06:09.
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