بقلم أندرو برامبتون (bramp.net) (ج) 2013-2024
واجهة سلسة لتشغيل FFmpeg من Java.
جيثب | مستندات API
نحن ندعم حاليًا Java 8 وما فوق. استخدم Maven لتثبيت التبعية.
< dependency >
< groupId >net.bramp.ffmpeg</ groupId >
< artifactId >ffmpeg</ artifactId >
< version >0.8.0</ version >
</ dependency >
شفرة:
FFmpeg ffmpeg = new FFmpeg ( "/path/to/ffmpeg" );
FFprobe ffprobe = new FFprobe ( "/path/to/ffprobe" );
FFmpegBuilder builder = new FFmpegBuilder ()
. setInput ( "input.mp4" ) // Filename, or a FFmpegProbeResult
. done ()
. overrideOutputFiles ( true ) // Override the output if it exists
. addOutput ( "output.mp4" ) // Filename for the destination
. setFormat ( "mp4" ) // Format is inferred from filename, or can be set
. setTargetSize ( 250_000 ) // Aim for a 250KB file
. disableSubtitle () // No subtiles
. setAudioChannels ( 1 ) // Mono audio
. setAudioCodec ( "aac" ) // using the aac codec
. setAudioSampleRate ( 48_000 ) // at 48KHz
. setAudioBitRate ( 32768 ) // at 32 kbit/s
. setVideoCodec ( "libx264" ) // Video using x264
. setVideoFrameRate ( 24 , 1 ) // at 24 frames per second
. setVideoResolution ( 640 , 480 ) // at 640x480 resolution
. setStrict ( FFmpegBuilder . Strict . EXPERIMENTAL ) // Allow FFmpeg to use experimental specs
. done ();
FFmpegExecutor executor = new FFmpegExecutor ( ffmpeg , ffprobe );
// Run a one-pass encode
executor . createJob ( builder ). run ();
// Or run a two-pass encode (which is better quality at the cost of being slower)
executor . createTwoPassJob ( builder ). run ();
شفرة:
FFprobe ffprobe = new FFprobe ( "/path/to/ffprobe" );
FFmpegProbeResult probeResult = ffprobe . probe ( "input.mp4" );
FFmpegFormat format = probeResult . getFormat ();
System . out . format ( "%nFile: '%s' ; Format: '%s' ; Duration: %.3fs" ,
format . filename ,
format . format_long_name ,
format . duration
);
FFmpegStream stream = probeResult . getStreams (). get ( 0 );
System . out . format ( "%nCodec: '%s' ; Width: %dpx ; Height: %dpx" ,
stream . codec_long_name ,
stream . width ,
stream . height
);
FFmpegExecutor executor = new FFmpegExecutor ( ffmpeg , ffprobe );
FFmpegProbeResult in = ffprobe . probe ( "input.flv" );
FFmpegBuilder builder = new FFmpegBuilder ()
. setInput ( in ) // Or filename
. done ()
. addOutput ( "output.mp4" )
. done ();
FFmpegJob job = executor . createJob ( builder , new ProgressListener () {
// Using the FFmpegProbeResult determine the duration of the input
final double duration_ns = in . getFormat (). duration * TimeUnit . SECONDS . toNanos ( 1 );
@ Override
public void progress ( Progress progress ) {
double percentage = progress . out_time_ns / duration_ns ;
// Print out interesting information about the progress
System . out . println ( String . format (
"[%.0f%%] status:%s frame:%d time:%s ms fps:%.0f speed:%.2fx" ,
percentage * 100 ,
progress . status ,
progress . frame ,
FFmpegUtils . toTimecode ( progress . out_time_ns , TimeUnit . NANOSECONDS ),
progress . fps . doubleValue (),
progress . speed
));
}
});
job . run ();
إذا كنت ترغب في إجراء تغييرات، فإن عملية الإنشاء والإصدار أمر بسيط:
# To build
mvn
# To test
mvn test
# To release (pushing jar to maven central)
# (don't forget to set up your ~/.m2/settings.xml)
mvn release:prepare
mvn release:perform
# To publish javadoc
git checkout ffmpeg-0.x
mvn clean javadoc:aggregate scm-publish:publish-scm
# Update Maven Plugins
mvn versions:display-plugin-updates
# Library Dependencies
mvn versions:display-dependency-updates
نحن ندعم فقط نسخة FFmpeg الأصلية، وليس نسخة libav. قبل Ubuntu 12.04، وفي 15.04 وما بعده، تم شحن FFmpeg الأصلي. إذا كان عليك التشغيل على إصدار يحتوي على libav، فيمكنك تثبيت FFmpeg من PPA، أو باستخدام الإصدار الثابت. مزيد من المعلومات هنا
نحن نرحب بالمساهمات. يرجى التحقق من تعقب المشكلة. إذا رأيت شيئًا ترغب في العمل عليه، فيرجى التعليق على المشكلة، أو إرسال طلب سحب فقط. هل تريد العمل على شيء آخر، فما عليك سوى فتح موضوع، ويمكننا مناقشته! نحن نقدر تحسينات التوثيق أو تنظيف التعليمات البرمجية أو الميزات الجديدة. يرجى الانتباه إلى أن كل العمل يتم على أساس تطوعي، وبالتالي قد نكون بطيئين في الرد.
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