Audio - 44.1KHz not playing


#1

Hi,

I generally like the WD TV Live, however support response from WD could be better.

Just an annoyance:

AVI files with MP3 audio at 44.1KHz have no sound coming through. Video is OK.

If I remux them at 48KHz (no change to the container or video) the audio’s fine.

I’ve asked WD support and am waiting for a response. 

The specs don’t mention any frequency limitations of MP3, just says it will play MP3.

Anyone tried a video with 44.1KHz audio and got it to work? If so what’s the trick?

Cheers from Oztralia


#2

I searched through my film / TV show collection and couldn’t find a single AVI with a 44.1KHz MP3 audio track.

An AVI with 44.1KHz WMA audio played fine.

Also, standalone 44.1KHz MP3 audio files play fine, making it rather baffling that such tracks won’t play when wrapped in an AVI container!

There was another thread on the forums that actually got a reply from WD staff (not the moderation team).  They prefixed their thread title with [BUG].  Perhaps that got it more attention?  May be worth editing your title and see if you can catch yourself a WD tech staff response.  ;)

-edit-

Found a music video I downloaded from Stage6 back in the day.  It has MPEG Layer3 44.1KHz audio.  Plays fine! :o

I’m accessing the files via Network Shares, are you using a Media Server by any chance?

Can you paste up some MediaInfo stats for that file?


#3

Thanks Grant (PixelPower) for the input… Sorry for the delay.

The following MediaInfo is for the same file encoded with two different MP3 audio rates in an AVI container. Video OK in both, audio plays for the 48K file but no audio when playing the 44.1K file.  I know the hardware is capable of 44.1K playback… Puzzling???

MediaInfo for a file that  plays:

General
Complete name                    : The Pilot.avi
Format                           : AVI
Format/Info                      : Audio Video Interleave
File size                        : 292 MiB
Duration                         : 24mn 50s
Overall bit rate                 : 1 644 Kbps

Video
ID                               : 0
Format                           : MPEG-4 Visual
Format profile                   : Simple@L3
Format settings, BVOP            : Yes
Format settings, QPel            : No
Format settings, GMC             : No warppoints
Format settings, Matrix          : Default (H.263)
Codec ID                         : XVID
Codec ID/Hint                    : XviD
Duration                         : 24mn 50s
Bit rate                         : 1 502 Kbps
Width                            : 640 pixels
Height                           : 480 pixels
Display aspect ratio             : 4:3
Frame rate                       : 29.970 fps
Resolution                       : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.163
Stream size                      : 267 MiB (91%)

Audio
ID                               : 1
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 3
Codec ID                         : 55
Codec ID/Hint                    : MP3
Duration                         : 24mn 49s
Bit rate mode                    : Constant
Bit rate                         : 128 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Stream size                      : 22.7 MiB (8%)
Alignment                        : Split accross interleaves
Interleave, duration             : 24 ms (0.72 video frame)

MediaInfo for a file that  does NOT play:

General
Complete name                    : The Pilot.avi
Format                           : AVI
Format/Info                      : Audio Video Interleave
File size                        : 291 MiB
Duration                         : 24mn 47s
Overall bit rate                 : 1 642 Kbps

Video
ID                               : 1
Format                           : MPEG-4 Visual
Format profile                   : Simple@L3
Format settings, BVOP            : Yes
Format settings, QPel            : No
Format settings, GMC             : No warppoints
Format settings, Matrix          : Default (H.263)
Codec ID                         : XVID
Codec ID/Hint                    : XviD
Duration                         : 24mn 47s
Bit rate                         : 1 502 Kbps
Width                            : 640 pixels
Height                           : 480 pixels
Display aspect ratio             : 4:3
Frame rate                       : 29.970 fps
Resolution                       : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.163
Stream size                      : 266 MiB (92%)

Audio
ID                               : 0
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 3
Mode                             : Joint stereo
Format_Settings_ModeExtension    : MS Stereo
Codec ID                         : 55
Codec ID/Hint                    : MP3
Duration                         : 24mn 46s
Bit rate mode                    : Constant
Bit rate                         : 128 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 44.1 KHz
Stream size                      : 22.6 MiB (8%)
Alignment                        : Aligned on interleaves
Interleave, duration             : 33 ms (1.00 video frame)
Writing library                  : LAME3.96.1


#4

Very strange…

Here’s the output from the one AVI I’ve got that has 44.1Khz mp3 audio:

General
Complete name : Gnarls Barkley - Crazy.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 31.2 MiB
Duration : 3mn 1s
Overall bit rate : 1 439 Kbps
Writing application : VirtualDubMod 1.5.10.2 (build 2540/release)
Writing library : VirtualDubMod build 2540/release

Video
ID : 0
Format : MPEG-4 Visual
Format settings, BVOP : Yes
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Muxing mode : Packed bitstream
Codec ID : DX50
Codec ID/Hint : DivX 5
Duration : 3mn 1s
Bit rate : 1 301 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 1.212
Frame rate : 23.976 fps
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.177
Stream size : 28.2 MiB (90%)
Writing library : DivX 6.5.1 (UTC 2007-03)

Audio
ID : 1
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Mode : Joint stereo
Format_Settings_ModeExtension : MS Stereo
Codec ID : 55
Codec ID/Hint : MP3
Duration : 3mn 1s
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 44.1 KHz
Stream size : 2.77 MiB (9%)
Alignment : Split accross interleaves
Interleave, duration : 42 ms (1.00 video frame)
Interleave, preload duration : 500 ms

The audio streams seem near identical BUT I notice that my file has a DivX video stream, unlike your file, which is XviD.

I’ll see if I can re-encode mine to XviD and try it again to see if that makes a difference… (it shouldn’t but you never know!).

-update-

Ok, that didn’t change anything.  My file still plays without issue.  The only difference I can see is that your audio alignment states “aligned on interleaves”.

Something you could try doing is putting the audio and video streams from the non-working AVI into an MKV container (use MKVmerge GUI, part of MKVtoolnix).  Just drag / drop the file onto the GUI and start muxing.  :)

If the audio still doesn’t work in an MKV container, perhaps it could be a problem with the encoding rather than a problem with support in AVI containers?

And there’s always the ‘standard’ factory reset advice:

If you haven’t done so since updating your firmware, do a factory reset.

  1. Press the hard reset button on the side of the unit (paperclip will help). Let it reboot.

  2. Go to Settings > System Setting > Reset to Factory Defaults.  Let it reboot.

  3. Put the unit in standby and unplug from the mains.  Leave it powerless for 5 minutes.

Plug the power back in and it will restart.  Log back into your shares (need to re-enter user/pass) or media server and try the file again.  I recently had an issue with TS / M2TS  files not playing that was solved by the 3rd step.

A final option would be to upload a smaller non-working sample AVI to Rapidshare / Megaupload and I’ll test it out on my Live to make sure it’s not specific to your unit.  Are you still running the 0.17 firmware?


#5

Thanks Grant. That is strange.

What product are you using to strem the video/audio file when it works?  I’m using Win7 and Media Center.

If I re-encode with 48K MP3 (no other change) audio is fine.

I have just played the sample videos from the WDTV Live disk (44.1K AAC) and they … work.

I’ll try recoding and / or remuxing… post the results and see if it helps anyone.

[Results:  Note Original was AVI with MP3 @ 44.1K

                             MKV with MP3 audio @ 44.1K - OK

                             AVI with AAc @ 44.1K -OK

                             AVI with MP3 @44.1K (remuxed with AVIDEMUX - OK

So there was something wrong with 29 AVI videos that has now been fixed simply by remuxing ???

I have a new-found appreciation for AVIDEMUX. I will remux each of the offending AVIs and voila!  ]

Thanks again for your efforts.

Cheers from Oz trail ya :wink:


#6

So does it play with net shares?

If so, it’s your media server that’s the problem.


#7

Glad you got it working, and a relatively painless fix too - bonus!  :)

Just for reference, I was playing the file via network share but it also plays fine via media server (TVersity).

Do you know / remember what program created the broken AVI files?  Might help others who find themselves in the same boat. 

If you’re happy that this is resolved, mark your above post as the solution.  ;)