mp4 issues on wd tv live, with good diagnostic info, please help, bug?


#1

Hi,

I’ve converted a bunch of home video taken with our digital camera from avi to mp4 with avconv, copy video/transcode audio.

This seemed to work great, however I find a whole bunch of the videos won’t play on the WD TV live, latest firmware.  It plays them in a fashion after around 30 seconds the audio starts and either blank screen with artifacts appears, with the occastion stuttering audio.

However these files work fine playing with movie player on ubuntu 12.1.

Output of mediainfo on a problem file is below…

Any ideas?

Cheers

Miles

General
Complete name                            : dscf2442.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom
File size                                : 9.54 MiB
Duration                                 : 3s 19ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 26.5 Mbps
Tagged date                              : UTC 2013-04-28 11:11:04
Writing application                      : Lavf53.21.1

Video
ID                                       : 1
Format                                   : JPEG
Codec ID                                 : 6C
Duration                                 : 3s 0ms
Bit rate mode                            : Variable
Bit rate                                 : 26.2 Mbps
Maximum bit rate                         : 29.1 Mbps
Width                                    : 1 280 pixels
Height                                   : 720 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 30.000 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.949
Stream size                              : 9.39 MiB (98%)

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 3s 19ms
Bit rate mode                            : Variable
Bit rate                                 : 407 Kbps
Maximum bit rate                         : 423 Kbps
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 44.1 KHz
Compression mode                         : Lossy
Stream size                              : 150 KiB (2%)


#2

I would assume that its a something to do with the video format. Just because it has an mp4 extension does not mean that the WD player will play it correctly, it has to be encoded properly. What was wrong with original avi file. Are you playing them from a connected drive or from a network? Software players are able to play files which are badly encoded unlike hardware players.


#3

Yep, i agree. I want to use mp4 as thats compatible across most of our devices, ie iphone/ipad etc…


#4

Perhaps you could use a program that encodes both video and audio correctly to mp4.

Maybe Winff or even better Handbrake.