Can't get audio with movie trailer downloads with 5.1 audio. Please help.

[yeto]

I downloaded some mp4 movie trailers from HD-trailers.net 1080p with 5.1 audio. The video plays fine using Windows Media Player but I do not get any audio on my laptop. I also downloaded some movie trailers that are not in 5.1 and I get audio just fine. Any ideas why Windows Media Player is not playing the 5.1 audio? I am running Windows 7 OS.

[Krispy Kritter]

Most likely a missing audio codec.

Open the file with Mediainfo and you can see which codecs were used.

[yeto]

Most likely a missing audio codec.

Open the file with Mediainfo and you can see which codecs were used.

MediaInfo is showing: audio stream AC-3

Would this audio play on a TV that supports the following Audio Codecs: Dolby Digital, LPCM, ADPCM(IMA,MS), AAC, HE-AAC, WMA, Dolby Digital Plus, MPEG (MP3), DTS (Core, LBR), G-711 (A-Law, u-Law)

Also, should my computer be able to play AC-3?

Thanks in advance for any help,
yeto

[Dougster]

Windows Media Player does not support AC-3 with a mp4 container natively. VLC or MPC-HC could play these without a problem.
For WMP to work you will need a codec installed.

[yeto]

Windows Media Player does not support AC-3 with a mp4 container natively. VLC or MPC-HC could play these without a problem.
For WMP to work you will need a codec installed.

Do you think a TV would play the audio if the video is loaded on a flash drive and played through the TVs USB port?

[Krispy Kritter]

The only way to know for sure is to test it.

[hello_hello]

My TV's manual doesn't specify support for AC3 in an MP4 container (only MKV), but it happily plays it anyway.
Chances are your TV's media player will play the audio. Dolby Digital = AC3.