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Ezequiel Tolnay wrote: |
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> I was wondering if any of you has had a similar problem and figured |
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> a way to maintain the AV in sync after converting an mpeg to AVI |
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> format, or if any of you can give me any clues as to why is this |
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> happening and a way to prevent/solve it. |
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After much fidling with it, I found a solution for it, and would like to |
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share it with whoever has this problem in the future. The problem is |
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basically that the mpeg2 source has repeated frames, and the transcode |
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utility filters them without compensating with the audio, thus creating |
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a synching issue. If the source is already mpeg2 for video and audio but |
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the dvdauthor doesn't like it, that's because the video also needs to be |
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built for DVD (some kind of meta information between frames, or |
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something like that). The same for other formats such as SVCD. |
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In my case the video had already the proper codecs (both mpeg2), the |
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proper size (352x288 for PAL, which is fine), and the proper audio |
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bitrate (224), but not formatted for DVD. To format it properly, use the |
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following: |
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mencoder -oac copy -ovc copy -of mpeg -mpegopts format=dvd -vf harddup |
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-o dvdformatted.mpg original.mpg |
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Should your source be in a different format, mencoder can take care |
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of the proper transformations, there is a tutorial and a series of |
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examples about it at |
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www.mplayerhq.hu/DOCS/HTML/en/menc-feat-vcd-dvd.html (the page takes an |
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eternity to load, by the way...). To create the DVD I used qdvdauthor, |
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which is quite primitive but gets the job done quite nicely. |
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Happy authoring! |
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Ezequiel |
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-- |
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