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Virtual Dub
Audio Compression: Unknown (tag 0055) |
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| When making DVD standard MPG files out of DivX (or other MPEG4 based codecs) you may come across a file that won't allow you to convert the audio. The file will play fine in any player you put it in, but will not convert no matter what you do. | ||||||
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| When I transcode (convert) DivX files to MPGs, I always check the properties of the file. If the file has MP3 audio or any other variable bitrate audio, the converted file could have audio/video sync problems. To avoid this, I save the audio out as a .WAV with Virtual Dub and convert the .WAV to .MP2 format with BeSweet. I then recombine the files with TMPGEnc to make DVD standard MPG files. | ||||||
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During this process, sometimes you come across a file that will not allow you to save a WAV of the audio. When you look at the file properties it says "Compression: Unknown (tag 0055)". This error usually means that you are missing an MP3 codec that can decode this file, but you won't find a single codec that will work with it. Just to be sure, you should probably download all of these: Lame | Lame ACM | AC-3 ACM | AC3 | Core AAC | Core FLAC | Fraunhoffer MP3 |
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| In my experience, some files will show this error regardless of what codecs you have installed. I am not sure why, but I assume from my solution that these files were not created correctly. It seems that the file properties were incorrectly marked for the type of data contained. | ||||||
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| Open the file in VirtualDub and open the file properties from the file menu. If you are going to have a problem converting the audio, it will show 0055 in the audio compression. |
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| Because the audio was marked incorrectly, VirtualDub and most video editing software view the audio as the wrong type and can't handle it. So, we just need to get the audio separated from the video file. | ||||||
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| With the audio compression set to "Direct Stream Copy" save the .WAV. |
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| Now you should have a file with a .WAV extension, that is actually an .MP3. Rename the file extension and you can use any MP3 to WAV file converter. |
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One of the easiest ways I have found to make this conversion is an older version of Winamp. The newer versions don't necesarily have the "Disk Writer" feature. I used 2.80 and it worked just fine. | |||||
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All you have to do is select "Disk Writer" from
the output options, select where you wnat the file to be saved and press
the play button. Make sure the repeat is turned off because it will copy
over itself once it is done.
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| Once you are done creating the .WAV, you can convert it to a DVD standard MP2 file using BeSweet, and recombine it with the video using TMPGEnc. | ||||||
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