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複数音声のmp4ファイルの音声の音ズレを個別に調整する

More than 3 years have passed since last update.

複数言語の音声が入ったMP4の動画の音ズレを修正する方法。

ffmpeg.exe -i "movie.mp4" -itsoffset 0.3 -i "movie.mp4" -itsoffset 0.4 -i "movie.mp4" -map 0:v -map 1:a:0 -map 2:a:1 -c copy "movie-audio-delayed.mp4"

これで一つ目の音声を0.3秒遅らせて、2つ目の音声を0.4秒遅らせる処理になる。
詳しくはStackoverflowの回答を参考に。

参考

http://stackoverflow.com/questions/9643348/delay-audio-with-ffmpeg

ironsand
思いついたアイデアをすぐに形にできる能力を身につけたいのでRailsを頑張って習得中。仕事ください。
http://programming.ironsand.net/
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