The VideoLAN Forums

When trying to play a .mkv file generated by a Axis Q1755 with VLC it shows no video
The debug concole of VLC show the following error:

non-existing PPS 0 referenced
decode_slice_header error
no frame!

FFmpeg gives the same error

when playing the file with wmp+axis matroska splitter it works fine

How kan I play this file with VLC?

EDIT:
the .conf file that comes with the .mkv has the following content


[Recording]
RecordingUUID=f68f9ca8-8736-11de-8a42-00408c944b97
DiskId=SD_DISK
StartTime=2009-08-12T11:54:54.989075Z
StopTime=2009-08-12T11:59:55.069928Z
RecordingType=scheduled
RecordingStatus=inactive
Locked=no
EventId=mySports

[Stream.Video]
MimeType=video/x-h264
Source=
FrameRate=25:1
Resolution=1280x720
CodecData=AAAAAWdCACnikAoAt2BqwYBBuHiRFQAAAAFozjyA
CapsStr=video/x-h264, width=(int)1280, height=(int)720, framerate=(fraction)25/1

Kind regards,
Jacco

Can MKVtoolnix remux the file?

mkvmerge has no problem muxing the video

I have the same issue. I tried to install Matroska splitter, does not work. ffmpeg shows same issue as Jacco.

Files posted on www.hardloopwereld.nl/mkv_vlc.zip

Kor

Does the file remuxed with mkvtoolnix work any better?

No, it does not make any differance.

Still same message in both orginal file and remuxed file for vlc, mencoder and ffempg:

Error while decoding stream #0.0
[h264 @ 0x3ee160]non-existing PPS referenced
[h264 @ 0x3ee160]decode_slice_header error
[h264 @ 0x3ee160]no frame!

File can be downloaded on http://www.hardloopwereld.nl/mkv_vlc.zip

MPCHC doesn't play the file either. So I am guessing it isn't following the specs or it has been damaged.

I am able to play the video using windows mediaplayer +matroska splitter

You mean Haali Splitter?

I mean the "Axis Matroska Splitter"

I am guessing that they are doing some sort of playback trick to make it work but I don't know what they are doing. So I don't know if this could be fixed with some code changes.

Hello,

The reason the files are not playable in VLC is that the .mkv file does not have the correct codec_privat (I think that is what it is called) data set.
That is the information found in the .conf file and it is used by the Axis Matroska Splitter.

/bjarne

Hello,
The reason the files are not playable in VLC is that the .mkv file does not have the correct codec_privat (I think that is what it is called) data set.
That is the information found in the .conf file and it is used by the Axis Matroska Splitter.
/bjarne

Has anyone found a way to correct that codec_privat setting or get the Axis Matroska Splitter to work with VLC? I hate having to use WMP to view the videos.

Hi All

The only way to playback/stream/transcode the Axis MKV files with VLC(Windows only) I've found:
1) download and install VH Multi camera studio(free) from the NET(google will help)... I test it with ver.1.1.8;
2) download and install AXIS Matroska File Splitter(free) from the Axis site(http://www.axis.com/techsup/software/index.htm);
3) start VH MultiCam with the Axis mkv file. Enable output to VH MultiCam video capture device(Tools). You could exit the program now(all settings are saved);
4) start VLC and feed it with VHMultiCam DirectShow device and then Playback/Stream/Transcode. It will start the new instance of VHMultiCam from the beginning of the file automatically. If you want to rewind,- just rightclick on VHMultiCam and do it.

So I opened a case with Axis technical support, and they sent me a new beta firmware version that fixes this problem. A compliant mkv file is created that you can play on VLC and Avidemux (those are the only two programs I tried). Hooray!

The beta firmware I got was for the Axis Q1755 camera, but I don't think I have permission to post it here. So if you want to get playable mkv files, you will probably have to contact Axis tech support. Here is the filename I was given: