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javavideoffmpegmpegtranscoding
dancavallaro
dancavallaro

Reputation: 13337

Programmatically transcode MPEG-2 videos

I need to be able to programmatically transcode mpeg-2 files to .mp4, .mp3, .wmv, .rm (optional), and .flv (optional), and hopefully generate a thumbnail as well. I found the Java Media Framework, but it frankly looks pretty crappy. This will be running a Linux server, so I could shell out to ffmpeg using Commons Exec - does ffmpeg do everything I need to do? FFmpeg seems pretty daunting, which is why I'm having trouble finding this information, but it definitely seems to be a jack-of-all-trades. Any suggestions?

Upvotes: 2

Views: 3431

Answers (4)

Pinstripe
Pinstripe

Reputation:

Ffmpeg is the best and easiest. To output/convert video:

ffmpeg -i {input}.ext -r {target_frame_rate} -ar {target_audio_rate} -b {target_bitrate} -s {width}x{height} {target}.ext

And your screenshot:

ffmpeg -i {input}.ext -r 1 -ss 00:00:04:005 -t 00:00:01 -an -s {width}x{height} {target_name}%d.jpg

15 fps is standard for flv and audio sample rate should be 44100 for flv. Options to use: -r specifies a frame rate of 1 fps (one frame used as the screenshot), -ss seeks to the position you want hh:mm:ss:fff, -t is the duration (one second to match your one fps), -an tells ffmpeg to ignore audio, and -s is the size of the screenshot. The %d is necessary as it will be the digit incremented on how many screenshots you use. With the above, %d will always be the number 1 (one frame, one screenshot). Good luck.

Upvotes: 5

Art Clarke
Art Clarke

Reputation: 2505

You can also use Xuggler directly from Java, which provides much better codec and encoding support than JMF.

Upvotes: 2

Brandon
Brandon

Reputation: 6872

An interesting web service from encoding.com will transcode files for you.

Upvotes: 2

codelogic
codelogic

Reputation: 73712

The popular transcoding applications for Linux are ffmpeg, transcode and mencoder. Both transcode and mencoder use ffmpeg and all three can handle the tasks that you require, including FLV transcoding and video thumbnailing. ffmpeg is probably the most popular of the three, so you might find better online support. Also worth mentioning is that ffmpeg supports multithreaded transcoding.

I would recommend using ffmpeg.

Upvotes: 0

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