Best way to determine what's inside my video container?


#1

I recently purchased a WD TV Live Hub and have a video question. I will apologize in advance since I am a novice to all this video stuff. One of the reasons I bought the hub was to store my families workout DVDs (P90X) and play them to any DLNA or UPnP device in the house. We’ve been through two sets of these DVDs already because of heavy use. Anyway, I have been using DVDfab to copy these dvds. I have been saving them as a single large VOB files on the hub. Some of these files will stream just fine to the remote DLNA or UPNP devices while others won’t even show up.  I would think that since these workout DVDs are all part of a set that they would be encoded the same. Is there a program that will let me look at a VOB files contents so that I can compare the files that work fine to those that don’t. Or, if anyone has any ideas as to why I’m experiencing this problem any tips would be great. Thanks.


#2

I believe MediaInfo is the most popular free utility for determining codecs used within a wide range of containers.


#3

I will give that a shot. Hopefully some difference between the files will be revealed. Thanks much!


#4

No problem.  

If you can’t see any difference yourself, post back with the complete outputs for a working file and a non-working file.  Maybe someone here will spot something.  ;)


#5

Excellent idea. I appreciate all the help!!!:smiley:


#6

Okay, I used Mediainfo to compare working and non-working files and I can see no reason why one would work while another doesn’t. Following is the Mediainfo data for a file that streams just fine to other DLNA devices and one that does not. They were both ripped using DVDfab with identical settings, double and triple checked. I have absolutely no clue. Could there be a problem with Twonky? Anyway, If someone could look at the data and let me know if they see something that might explain the issue, that would be great! Thanks.

WORKING:

Complete name                    : \WDTVLIVEHUB\WDTVLiveHub\Movies\P90X - Yoga X\P90X - Yoga X.vob

Format                           : MPEG-PS

File size                        : 3.62 GiB

Duration                         : 1h 35mn

Overall bit rate                 : 5 448 Kbps

Video

ID                               : 224 (0xE0)

Format                           : MPEG Video

Format version                   : Version 2

Format profile                   : Main@Main

Format settings, BVOP            : Yes

Format settings, Matrix          : Default

Duration                         : 1h 35mn

Bit rate mode                    : Variable

Bit rate                         : 5 148 Kbps

Nominal bit rate                 : 8 840 Kbps

Width                            : 720 pixels

Height                           : 480 pixels

Display aspect ratio             : 4:3

Frame rate                       : 29.970 fps

Standard                         : NTSC

Color space                      : YUV

Chroma subsampling               : 4:2:0

Bit depth                        : 8 bits

Scan type                        : Interlaced

Scan order                       : Top Field First

Compression mode                 : Lossy

Bits/(Pixel*Frame)               : 0.497

Stream size                      : 3.42 GiB (94%)

Audio

ID                               : 128 (0x80)

Format                           : AC-3

Format/Info                      : Audio Coding 3

Mode extension                   : CM (complete main)

Duration                         : 1h 35mn

Bit rate mode                    : Constant

Bit rate                         : 192 Kbps

Channel(s)                       : 2 channels

Channel positions                : Front: L R

Sampling rate                    : 48.0 KHz

Bit depth                        : 16 bits

Compression mode                 : Lossy

Stream size                      : 131 MiB (4%)

Text

ID                               : 224 (0xE0)-DVD-2

Format                           : EIA-608

Muxing mode                      : DVD-Video

Muxing mode, more info           : Muxed in Video #1

Stream size                      : 0.00 Byte (0%)

NON-WORKING

CompleteName                     : \WDTVLIVEHUB\WDTVLiveHub\Movies\P90X - X Stretch\P90X - X Stretch.vob

Format                           : MPEG-PS

FileSize/String                  : 3.37 GiB

Duration/String                  : 1h 0mn

OverallBitRate/String            : 7 945 Kbps

Video

ID/String                        : 224 (0xE0)

Format                           : MPEG Video

Format_Version                   : Version 2

Format_Profile                   : Main@Main

Format_Settings_BVOP/String      : Yes

Format_Settings_Matrix/String    : Default

Duration/String                  : 1h 0mn

BitRate_Mode/String              : Variable

BitRate/String                   : 7 595 Kbps

BitRate_Nominal/String           : 8 840 Kbps

Width/String                     : 720 pixels

Height/String                    : 480 pixels

DisplayAspectRatio/String        : 4:3

FrameRate/String                 : 29.970 fps

Standard                         : NTSC

ColorSpace                       : YUV

ChromaSubsampling                : 4:2:0

BitDepth/String                  : 8 bits

ScanType/String                  : Interlaced

ScanOrder/String                 : Top Field First

Compression_Mode/String          : Lossy

Bits-(Pixel*Frame)               : 0.733

StreamSize/String                : 3.22 GiB (96%)

Audio

ID/String                        : 128 (0x80)

Format                           : AC-3

Format/Info                      : Audio Coding 3

Format_Settings_ModeExtension    : CM (complete main)

Duration/String                  : 1h 0mn

BitRate_Mode/String              : Constant

BitRate/String                   : 192 Kbps

Channel(s)/String                : 2 channels

ChannelPositions                 : Front: L R

SamplingRate/String              : 48.0 KHz

BitDepth/String                  : 16 bits

Compression_Mode/String          : Lossy

StreamSize/String                : 83.4 MiB (2%)

Text

ID/String                        : 224 (0xE0)-DVD-2

Format                           : EIA-608

MuxingMode                       : DVD-Video

MuxingMode_MoreInfo              : Muxed in Video #1

StreamSize/String                : 0.00 Byte (0%)


#7

Hmm.  Comparing them side by side, there are no differences other than in bitrate, which isn’t different enough to be an issue.

Have you tried playing them via network share instead of via media server, or do your remote DLNA devices not support this?

Also, do the non-working VOBs play from the internal HDD directly on the Hub?  As in, are they in the Hub’s Media Library and playable?

It probably is a Twonky issue, since that’s the DLNA server and the connected DLNA devices can’t see the files.  Not sure how you go about rebuilding the Twonky filelist… on my MyBookLive NAS it’s possible via the web interface but those options are missing on the Hub’s web interface…  I guess you could try disabling / re-enabling Twonky on the Hub, see if it makes a difference to which files are listed?


#8

Yeah, they looked pretty much identical to me as well.

My remote DLNA devices don’t all see the shares unfortunately. Otherwise, that would be a resolution.

Yes, the non-working VOBs appear and play just fine directly from the hub.

I figured it’s a Twonky issue. Twonky does allow you to rebuild the database and re-compose filelist but both seem to have no effect. Neither does turning Twonky on/off. It is possible that the fault could lie with the remote devices as well. It’s probably just operator error somewhere. I’ll keep trying. Thanks for your time, I do appreciate it.