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@ -478,4 +478,12 @@ public class FFmpegUtil { |
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return ffprobeCmd.split(" "); |
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} |
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public static String[] changeSpeed(String inputFile, String outputFile, float speed) { |
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//audio atempo: 0.5--2
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float ptsFactor = 1/speed; |
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String speedCmd = "ffmpeg -i %s -filter_complex [0:v]setpts=%.2f*PTS[v];[0:a]atempo=%.2f[a] -map [v] -map [a] %s"; |
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speedCmd = String.format(Locale.getDefault(), speedCmd, inputFile, ptsFactor, speed, outputFile); |
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return speedCmd.split(" "); |
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} |
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} |
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