除了這個命令（合並）之外，ffmpeg大部分時間在java中工作正常，這個命令在終端中工作正常

Question

當我從命令行運行它時，它可以工作（並排合並兩個視頻）：

/usr/local/bin/ffmpeg -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test.mov -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test1.mov -filter_complex "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/merged.mov

但是，當我在java中運行它時，我從控制台得到它：

[AVFilterGraph @ 0x7fd44ad00440] No such filter: '"'
Error configuring filters.

這是我要返回的文本（直接復制），這是我要發送的文件。 它完全相同，除了我在引號之前使用轉義字符，所以“變成\\”：

"/usr/local/bin/ffmpeg -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test.mov -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test1.mov -filter_complex \"[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w\" /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/merged.mov";

所有其他的ffmpeg測試都有用，除了這....（我使用“字符”的唯一一個）

任何人都可以搞清楚嗎？

Answer 1

您應該將Java中的命令拆分為String數組，然后將其傳遞給getRuntime（）。exec（String []）

簡短的例子：

String cmd[] = new String[]{
                "ffmpeg",
                "-r", String.valueOf(20/30f), 
                "-i", "assets/IMAG0054_BURST%03d.jpg",
                "-i","assets/logo.png",
                "-i","assets/guitar_tuning.wav","-r", "24", "-codec:a", "mp3",
                "-filter_complex","[0:v][1:v]overlay=main_w-overlay_w-10:main_h-overlay_h-10,"+
                "drawtext=fontfile=assets/OpenSans-Regular.ttf:text=1st scene:x=0:y=0:fontsize=100:fontcolor=white:enable='between(t,0.5,2.5)'," +
                "drawtext=enable='between(t,2.6,5.5)':fontfile=assets/OpenSans-Regular.ttf:text=2nd scene:x=0:y=0:fontsize=100:fontcolor=white," +
                "drawtext=enable='between(t,5.6,8.8)':fontfile=assets/OpenSans-Regular.ttf:text=3rd scene:x=0:y=0:fontsize=100:fontcolor=white," +
                "drawtext=enable='between(t,8.9,30)':fontfile=assets/OpenSans-Regular.ttf:text=4rd scene:x=0:y=0:fontsize=100:fontcolor=white" +
                "[out]",
                "-map", "[out]", "-map", "2:0",
                "-acodec","mp3",
                //"-shortest " +
                "simple_lapse.mp4"};

Process ffmpeg = Runtime.getRuntime().exec(cmd);

希望能幫助到你