How can i convert this ffmpeg command line with FFmpegFrameRecorder?

[antoniogiordano]

Hi everybody, i have this ffmpeg line command parameters i have to replicate with javacv library.
How can i do?

-strict -2 -c:a aac -b:a 128k -ar 44100 -r 30 -g 60 -keyint_min 60 -b:v 400000 -c:v libx264 -preset medium -bufsize 400k -maxrate 400k -f flv

Actually i have:

        // H264
        recorder.setVideoCodec(28);
        recorder.setFormat("mp4");
        recorder.setFrameRate(frameRate);
        // frameRate * 2; Azure needs GOP or key frame interval of 2 seconds
        recorder.setVideoOption("keyint_min", "60");
        recorder.setSampleRate(sampleAudioRateInHz);

How can i complete?

[Iqra786]

u can add following lines

recorder.setVideoCodec(org.bytedeco.javacpp.avcodec.AV_CODEC_ID_H264);
recorder.setAudioCodec(org.bytedeco.javacpp.avcodec.AV_CODEC_ID_AAC);
recorder.setVideoOption("preset", "medium");
recorder.setVideoBitrate(400000);

[alicanalbayrak]

I need help with similar issue. I'm trying to implement following command with FFMpegFrameRecorder.

ffmpeg -i rtsp://10.0.5.1:554/live.sdp -vcodec copy ./vid.mp4

And my recorder settings like below:

frameRecorder = new FFmpegFrameRecorder(fout, frameGrabber.getVideoWidth(), frameGrabber.getVideoHeight());
        frameRecorder.setFormat("mp4"); 
        frameRecorder.setFrameRate(frameRate);
//      frameRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
        frameRecorder.setVideoCodecName("H264");
        frameRecorder.setVideoQuality(0);

It works when I use frameRecorder.setVideoCodecName("H264"); but fails when frameRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264); used. It says:

org.bytedeco.javacv.FrameRecorder$Exception: avcodec_open2() error -22: Could not open video codec.
    at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:529)
    at org.bytedeco.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:288)

Also records are not smooth as expected. (Looking like some areas' pixels enlarging and marshalling neighbors pixels) Here is ffprobe output of my stream Could you give me any advice to record the stream (that I share ffprobe result) ?

[saudet]

@alicanalbayrak Have you tried with the latest code from the repository (1.2-SNAPSHOT)?

[alicanalbayrak]

No Saudet, I did not. I tried it with javacv version 1,1. I could not build javacpp-presets 1.2-SNAPSHOT locally. Because, I'm using CentOS 7 and Flycapture SDK does not support any other linux packages except Ubuntu. Any ways, I tried to pass -vcodec copy parameter to recorder by using frameRecorder.setVideoOption("vcodec", "copy") but still throws avcodec_open2() error -22: Could not open video codec.

[saudet]

The ffmpeg module doesn't depend on flycapture, so you don't need to build that.

There is no codec named copy. That is just a special name used by the ffmpeg command line program. You're going to need to specify something valid there.

If you're looking for the something equivalent to the copy feature, that's what packets are for (issue #93). Please consider making a contribution. It's a feature requested by a lot of people, so it wouldn't be useful only to you! Thanks

[saudet]

JavaCV 1.4 has just been released. Is this working any better these days?

[saudet]

With commit bytedeco/javacpp-presets@13ffffd the ffmpeg program itself now gets bundled, so we can use it easily from Java. For this case, we could do something like the following:

   String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);
   ProcessBuilder pb = new ProcessBuilder(ffmpeg, "-strict", "-2", "-c:a", "aac", "-b:a", "128k", "-ar", "44100", "-r", "30", "-g", "60", "-keyint_min", "60", "-b:v", "400000", "-c:v", "libx264", "-preset", "medium", "-bufsize", "400k", "-maxrate", "400k", "-f", "flv", ...);
   pb.inheritIO().start().waitFor();

Please give it a try with 1.5-SNAPSHOT before the release: http://bytedeco.org/builds/

[saudet]

The ffmpeg program is now being bundled starting with JavaCV 1.5. Enjoy!