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You are here: MacNN Forums > Our Archives > General Archives > Digital Video & Audio Archives > Calling all MPEG gurus....

 
Calling all MPEG gurus....
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Grizzled Veteran
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Jul 6, 2005, 12:14 PM
 
I have a replay TV that I use to record certain TV shows off off. If the show is good the I stream the show to my PB. Problem was that it is in the MPEG2 Muxed mode and I couldn't get sound to work, video was OK . I paid for a codec off the apple site (QT 6 MPEG-2 PLAYBACK, actually it works on QT7) and now I can play the movie no problem. But I would like to archive the show using H264 format. However when I choose any h264 option under export - there's no sound component to it. I would like to avoid exporting it to a format that will lose quality then re-encode using h264 (sound is strangely available in codec other than h264 why?)


Any suggestions to get around this?
Pismo 400 | Powerbook 1.5 GHz | MacPro 2.66/6GB/7300GT
     
Nap
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Jul 6, 2005, 02:06 PM
 
QT (including the mpeg-2 component) does not support the export of sound from a muxed mpeg file (-1 or -2). There is, however, a freeware that will export to a number of formats and will include the sound in the export.
http://www.alfanet.it/squared5/mpegstreamclip.html
     
tkmd  (op)
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Jul 6, 2005, 02:08 PM
 
Yes I tried this program but if I try to export it to h264 (its an option in slipstream ) the program crashes. Very frustrating
Pismo 400 | Powerbook 1.5 GHz | MacPro 2.66/6GB/7300GT
     
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Jul 6, 2005, 02:59 PM
 
For whatever reason QT doesn't allow for audio export from mpeg files (though it does for MP3). Option 1 is to extract the audio to AIFF using MPEG Streamclip and encode audio and video separately; option 2 is to try something like ffmpegX that will encode video and audio at the same time.
     
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Jul 7, 2005, 02:13 AM
 
Originally Posted by tkmd
Yes I tried this program but if I try to export it to h264 (its an option in slipstream ) the program crashes. Very frustrating
It seems to not crash when I try this. Can you post the crash log? Maybe it will reveal the culprit.
     
tkmd  (op)
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Jul 8, 2005, 09:14 AM
 
OK so I used slipstream to extract the audio (aiff) from the movie. Now I'm going to encode the video, using qt h264. I would like to join the video component and the audio using qt - any suggestion on how to do this??
Pismo 400 | Powerbook 1.5 GHz | MacPro 2.66/6GB/7300GT
     
Grizzled Veteran
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Jul 8, 2005, 09:37 AM
 
In QT Pro, select all, copy, add. Just make sure you're not adding scaled audio.

Edit: You can also use QTMF. Select audio and video input files and it will create a new Quicktime file.

Edit2: Btw, it's "MPEG Streamclip".
(Last edited by Jacke; Jul 8, 2005 at 11:23 AM. (Reason:addition))
     
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Jul 8, 2005, 11:00 AM
 
Any chance VLC would solve his problems?
     
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Jul 8, 2005, 11:22 AM
 
VLC (at least the version I have) doesn't support output to H264.
     
tkmd  (op)
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Jul 8, 2005, 10:44 PM
 
Jacke what do you mean by flattened audio ? I used streamclip to get the audio to aiff was this not the right thing to do ? I was going to convert it to a compressed format like mp3 or m4a to save space...
Pismo 400 | Powerbook 1.5 GHz | MacPro 2.66/6GB/7300GT
     
Mac Enthusiast
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Jul 9, 2005, 12:08 AM
 
Originally Posted by Jacke
VLC (at least the version I have) doesn't support output to H264.
But he could play the muxed video.

For conversion to h.264, ffmpegX 0.0.9s will do that. You can find it on Versiontracker.
     
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Jul 9, 2005, 04:52 AM
 
Originally Posted by tkmd
Jacke what do you mean by flattened audio ? I used streamclip to get the audio to aiff was this not the right thing to do ? I was going to convert it to a compressed format like mp3 or m4a to save space...
I never said anything about flattened audio... You can very well compress the AIFF to MP3 or M4A and then use QT Pro to combine the video and audio.

Originally Posted by justinkim
For conversion to h.264, ffmpegX 0.0.9s will do that. You can find it on Versiontracker.
Or via the link in the fourth post in this thread.
     
 
   
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