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No Audio with Transport Stream

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Russ Haskell
No Audio with Transport Stream
on Nov 3, 2011 at 5:21:34 pm

Made 3 versions of a show for Web, DVD, and broadcast. The source file in Apple Compressor was ProRes SD. For the broadcast version I was asked for and made an MPEG-2 file, using the transport stream settings.

When I open it in MPEG Streamclip, I get no audio, even though the stream info says it's there (listed as MP2 Stereo).

The other 2 versions are fine.

I looked through the user manual and thought I understood the MPEG-2 section, but clearly I don't.

Any help in clarifying this would be most appreciated.

Russ


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Craig Seeman
Re: No Audio with Transport Stream
on Nov 3, 2011 at 8:40:29 pm

Test playback with VLC.

For Broadcast it would be Program or Transport Stream. Just making sure you're not looking at the MPEG2 for DVD which would have no audio.



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Russ Haskell
Re: No Audio with Transport Stream
on Nov 3, 2011 at 11:57:46 pm

Thanks, Craig.

So both audio and video played fine in VLC.

Not sure what to make of MPEG Streamclip's problem with the file.

And yes, I did double check to verify that I had opened the m2t.

Thanks again.

Russ


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Craig Seeman
Re: No Audio with Transport Stream
on Nov 4, 2011 at 12:03:20 am

Since MPEGStreamclip may be using the Quicktime library I'd guess Quicktime can't play it either.

If you believe you used the same settings for your other MPEG2 files you can double check by opening the files in the free MediaInfo and double check the audio codec and other metadata.



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Russ Haskell
Re: No Audio with Transport Stream
on Nov 5, 2011 at 2:36:30 am

Here's what mediainfo tells me. See anything noteworthy?

Russ


* * * MediaInfo Mac 0.7.36.0 file analysis report.
* * * MediaInfo Mac is ©2010 by Diego Massanti - http://mediainfo.massanti.com
* * * MediaInfoLib by Jerome Martinez - http://mediainfo.sourceforge.net
Created on: Nov 4, 2011 10:29:01 PM EDT
Report for file: Studio 3X2 ProRes 11 03 11 Copy-Transport Stream.m2t

General / Container Stream #1
Total Video Streams for this File.................1
Total Audio Streams for this File.................1
Video Codecs Used.................................MPEG-2 Video
Audio Codecs Used.................................MPEG-1 Audio layer 2
File Format.......................................MPEG-TS
Play Time.........................................29mn 38s
Total File Size...................................3.29 GiB
Total Stream BitRate..............................15.9 Mbps
Video Stream #1
Codec (Human Name)................................MPEG Video
Codec (FourCC)....................................2
Codec Profile.....................................Main@High
Frame Width.......................................720 pixels
Frame Height......................................480 pixels
Frame Rate........................................29.970 fps
Total Frames......................................53277
Display Aspect Ratio..............................4:3
Video Standard....................................NTSC
Scan Type.........................................Interlaced
Scan Order........................................BFF
Color Space.......................................YUV
QF (like Gordian Knot)............................1.423
Codec Settings (Matrix)...........................Default
Video Stream Length...............................29mn 37s 676ms
Video Stream BitRate..............................14.7 Mbps
Video Stream BitRate (Nominal)....................20.0 Mbps
Video Stream BitRate Mode.........................VBR
Bit Depth.........................................8 bits
Video Stream Size.................................3.05 GiB (93%)
Audio Stream #1
Codec.............................................MPEG Audio
Codec (FourCC)....................................3
Audio Stream Length...............................29mn 37s 680ms
Audio Stream BitRate..............................384 Kbps
Audio Stream BitRate Mode.........................CBR
Number of Audio Channels..........................2
Sampling Rate.....................................48.0 KHz
Audio Stream Delay................................522ms
Audio Stream Size.................................81.4 MiB (2%)
Menu / Chapters Stream #1


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