I am attempting to use FFMPEG on Google App Engine (Java) to re-encode some
video files I have that are sitting in Google Cloud Storage. I found a Java
wrapper around ffmpeg that I would like to use here:
https://github.com/kokorin/Jaffree.
My issue is that this library requires an InputStream and OutputStream. I
am trying to specify the InputStream as a file in Google Cloud Storage and
the OutputStream as a new file.
I think I have done specifying the InputStream correctly, but I do not know
what to do about the OutputStream.
How can I specify the OutputStream to be a new file?
Or if possible, can I just overwrite the file in Google Cloud Storage?
Here is my Java code in Google App Engine so far:
Storage storage = StorageOptions.getDefaultInstance().getService();
// This is the input file
BlobId id = BlobId.of("storageBucket", "videos/video_1.mp4");
byte[] content = storage.readAllBytes(id);
InputStream inputStream = new ByteArrayInputStream(content);
FFmpeg.atPath()
.addInput(PipeInput.pumpFrom(inputStream))
.setOverwriteOutput(true)
.addArguments("-movflags", "faststart")
.addOutput(PipeOutput.pumpTo(outputStream)) <---- I need to set this
.setProgressListener(new ProgressListener() {
@Override
public void onProgress(FFmpegProgress progress) {
double percents = 100. * progress.getTimeMillis() /
duration.get();
System.out.println("Progress: " + percents + "%");
}
})
.execute();
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