No audio creating MP4 files

[jim2664258]

I have tried a couple discs and different audio options, but any mp4 file I generate does not have audio upon playback. Video looks fantastic, but no audio. I did go into the Preview screen and I can see English AC3 is selected (I also tried AAC) and I can hear audio during the preview.

I am thinking perhaps this is a codec issue on my machine? Actually, I am getting the same results on two different machines - but that doesn't mean I don't have the right codes installed on both of them.

I'll do the whole 'submit log' thing but first I am wondering if this is a simple setup error. Thanks.

 

[mike20021969]

Install MediaInfo:

Media Info Direct Link

or

Download.com (use Direct Download Link option underneath main link):
http://download.cnet.com/MediaInfo-Lite/3000-2248_4-75118685.html

After install, right-click on the (mp4) file>MediaInfo, and that will show you the audio properties of the file.

If the file contains audio, then you're most likely missing a codec required for playing it.

 

[jim2664258]

Looks like it is indeed AC-3 audio format. Any suggestions for a codec or codec pack? Thanks.

General
Complete name : C:\temp\Videos\Reign Of Fire.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 13.4 GiB
Duration : 1h 41mn
Overall bit rate : 18.8 Mbps
Writing application : Lavf55.20.0

Video
ID : 3
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=3, N=24
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1h 41mn
Bit rate : 18.2 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
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) : 0.366
Stream size : 12.8 GiB (96%)
Writing library : x264 core 142 r2453 ea0ca51
Encoding settings : cabac=1 / ref=1 / deblock=0:0:0 / analyse=0:0 / me=dia / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=4 / chroma_me=0 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=4 / lookahead_threads=1 / sliced_threads=0 / slices=4 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=2 / b_pyramid=2 / b_adapt=0 / b_bias=0 / direct=1 / weightb=0 / open_gop=1 / weightp=0 / keyint=24 / keyint_min=13 / scenecut=0 / intra_refresh=0 / rc=abr / mbtree=0 / bitrate=18179 / ratetol=1.0 / qcomp=0.50 / qpmin=2 / qpmax=31 / qpstep=3 / ip_ratio=1.40 / pb_ratio=1.25 / aq=0

Audio #1
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 1h 41mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 280 MiB (2%)
Language : English

Audio #2
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 1h 41mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 280 MiB (2%)
Language : English

 

[mike20021969]

I use K Lite codec pack. Some slate it, I've never had any problem using it.

http://www.codecguide.com/download_mega.htm

AC3Filter may be a simpler option: http://www.ac3filter.net/wiki/Download_AC3Filter

AC3Filter Screenshot:



If you do decide to use it or other codec pack, un-check any codecs you do not want installing.

 

[jim2664258]

I went with the K-Lite pack .. I have used it in the past. That was the problem, audio works now! Thanks Mike!

In case others have the same problem, I downloaded the 'mega' K-Lite pack and let it uninstall other codecs as it prompted me during the install.