No sound after 25 minutes of playing mp4 video


#1

Hi, I am new to this forum. I have got an issue with few mp4 files. The audio stops playing after 25 minutes of play. It only happens to few files and they are 720p or1080p files. I just dont get it as how wd can play 25 minutes of audio and then just stops playing audio and video keeps on playing. Files play fine on my computer. Can someone please help me with this. Thank you.


#2

Welcome to the forums.

First of all, it doesn’t matter (much) whether the files play on your computer or not.  A hardware device has MUCH different “rules” to it.

The files could be improperly authored.  How did you create them?  And you can post the MediaInfo on one of them here for us to take a look at.


#3

Thanks for the reply. I will post the media info tomorow.


#4

I appreciate the information you have laid out here. Thanks for forwarding this useful information.

__________________

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#5

Source…: Blueray

Rip Size…: 3GB

Resolution…: 1280x544

Runtime…: 3hrs 29min

Codec ID…: x264 3 Pass

Video Bitrate…: 1850 kbps

Frame Rate…: 24.000 FPS

Encoder used…: Megui

Audio Bitrate…: 192 kbps @ VBR

Audio Type…: AAC 5.1 Channel

Harddrive format…FAT

Is this enough information or do you need more? if you do need more than please advise me which programme to use to get the info required.  Thanks


#6

We’d like to see the full output of MediaInfo – that’s the program I first mentioned.


#7

Mediainfo (freeware)

http://mediainfo.sourceforge.net/en


#8

Thanks guys…here we go.

General
Format                           : MPEG-4
Format profile                   : Base Media
Codec ID                         : isom
File size                        : 1.50 GiB
Duration                         : 1h 46mn
Overall bit rate                 : 2 021 Kbps
Encoded date                     : UTC 2009-07-17 06:09:24
Tagged date                      : UTC 2009-07-17 06:09:24

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L3.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 1 frame
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 1h 46mn
Bit rate mode                    : Variable
Bit rate                         : 1 728 Kbps
Maximum bit rate                 : 7 108 Kbps
Width                            : 1 280 pixels
Height                           : 544 pixels
Display aspect ratio             : 2.35:1
Frame rate mode                  : Constant
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.104
Stream size                      : 1.27 GiB (85%)
Writing library                  : x264 core 67 r1165M 6841c5e
Encoding settings                : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=6 / psy_rd=1.0:0.0 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=3 / nr=0 / decimate=1 / mbaff=0 / bframes=0 / keyint=250 / keyint_min=25 / scenecut=40 / rc=abr / bitrate=1728 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Encoded date                     : UTC 2009-07-17 00:07:35
Tagged date                      : UTC 2009-07-17 06:16:46

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : 40
Duration                         : 1h 46mn
Bit rate mode                    : Variable
Bit rate                         : 305 Kbps
Maximum bit rate                 : 409 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Stream size                      : 231 MiB (15%)
Encoded date                     : UTC 2009-07-17 06:16:00
Tagged date                      : UTC 2009-07-17 06:16:46

please tell me if there is a programe that i can use to change settings if needed. Thankyou


#9

And also this following file does not play on wd at all. it says un supported format.

General
Format                           : MPEG-4
Format profile                   : Base Media
Codec ID                         : isom
File size                        : 3.38 GiB
Duration                         : 3h 21mn
Overall bit rate                 : 2 405 Kbps
Encoded date                     : UTC 2010-07-06 23:16:45
Tagged date                      : UTC 2010-07-06 23:16:45

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L4.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 8 frames
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 3h 21mn
Bit rate mode                    : Variable
Bit rate                         : 1 992 Kbps
Maximum bit rate                 : 9 285 Kbps
Width                            : 1 280 pixels
Height                           : 528 pixels
Display aspect ratio             : 2.40:1
Frame rate mode                  : Constant
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.123
Stream size                      : 2.80 GiB (83%)
Writing library                  : x264 core 100 r1659 57b2e56
Encoding settings                : cabac=1 / ref=8 / deblock=1:-1:-1 / analyse=0x3:0x113 / me=umh / subme=9 / psy=1 / psy_rd=1.00:1.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-4 / threads=6 / sliced_threads=0 / slices=4 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=4 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=24 / keyint_min=2 / scenecut=40 / intra_refresh=0 / rc_lookahead=24 / rc=2pass / mbtree=1 / bitrate=1992 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=40000 / vbv_bufsize=30000 / ip_ratio=1.40 / aq=1:1.00 / nal_hrd=vbr
Encoded date                     : UTC 2010-07-06 05:28:28
Tagged date                      : UTC 2010-07-06 23:19:44

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : 40
Duration                         : 3h 21mn
Bit rate mode                    : Variable
Bit rate                         : 409 Kbps
Maximum bit rate                 : 510 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Stream size                      : 588 MiB (17%)
Language                         : English
Encoded date                     : UTC 2010-07-06 23:19:21
Tagged date                      : UTC 2010-07-06 23:19:44


#10

The second file has an insane number of reframes, but that shouldn’t prevent it from playing.  However, you don’t say what container it’s in (filename would help).

I don’t see anything wrong with the encoding of the first, but given that it plays for a while that makes sense.  Most likely it’s just wrongly mastered – take your original and re-encode it using Handbrake with the High Profile preset (but change the output type to MKV) and that ought to fix it (hopefully you didn’t just download it from somewhere – because there are an awful lot of badly mastered files out there with no way to fix them if you don’t own the original disk).  That will also fix the second one I’m sure.


#11

I had this exact problem with a mp4 i had. About 10 minutes in the sound just stopped but when I converted to mkv it played fine. Very annoying but a solution none the less


#12

I don’t recall if the Live supports Multichannel AAC?


#13

Ah shoot – it doesn’t.  You’re right, Tony.

Why didn’t I see that?  Skotoma I guess.


#14

Second file is mp4 aswell.

Thankyou for your advise…i have only got few files that has a problem, otherwise there is no big issue…I did download it.