Playing video at slow frame rate at the end of the video.

[sanjaykumarm]

Hi Samuel

I am using JavaCV 0.11 Version to create the video from the set of images stored in my device's sdcard. I am able to create the video sucessfully but the issue is that video is playing at slow frame rate(In slow motion) at the end of the vide. I am setting correct FrameRate that i am taking from the grabber class.

new Thread(new Runnable()
        {
            @Override
            public void run()
            {

                FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputReverseVideo, 640, 352);
                AndroidFrameConverter frameConverter = new AndroidFrameConverter();
                //recorder.setVideoCodec(5);
                recorder.setVideoCodec(avcodec.AV_CODEC_ID_MPEG4);
                //recorder.setFormat("3gp");
                recorder.setFormat("mp4");
                //recorder.setSampleRate(44100);
                recorder.setVideoOption("preset", "ultrafast");
                //recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
                recorder.setFrameRate(24); //Make it dynamic  using frame grabber.
                recorder.setVideoBitrate(96512); // Also make this dynamic.

                try
                {

                    long startTime = System.currentTimeMillis();
                    recorder.start();

                    for (int i = 0; i <= 3000; i++)
                    {
                        String imagePath = outputFramesFolder + "test" + i + ".png";
                        Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
                        Frame frame = frameConverter.convert(bitmap);
                        recorder.record(frame);
                        Log.d(TAG, "=====Processed=====" + i + "th Frame");
                    }
                } catch (Exception e)
                {
                    e.printStackTrace();
                } finally
                {
                    try
                    {
                        if (recorder != null)
                        {
                            recorder.stop();
                            //recorder.release();
                        }
                    } catch (FrameRecorder.Exception e)
                    {
                        e.printStackTrace();
                    }
                }
            }
        }).start();

Can you please help me in this regards?

[saudet]

Maybe that has something to do with your particular video player. Did you try other video players?

[sanjaykumarm]

No I have checked it. Has not a problem with video player. In each player this is happening. It happens if I process first 3000 or any frames in between the total frames. Let's say I have 5000 total frames and if i process 2000 or 3000 frames to create the video then issue occurs. If I process all the frames there is no issue. I had tried it.

[saudet]

Could you explain in what way the number of frames is related to the frame rate?

[sanjaykumarm]

I have same question. It should not be related to it. But don't know what is happening. It should not happen.

[saudet]

Have you tried the latest source code? It might be related to the issue fixed in this commit: fb2206d

[sanjaykumarm]

Hi Samuel Audet,

I can not check it now, as i am not working on it right now. Actually that
project is dropped due to some reason.

[ShihabSoft]

Why can't you guys try using a Thread.sleep?

Regards,
ShihabSoft
Founder of RevealedTricks4U http://www.revealedtricks4u.com

[saudet]

Is this issue still happening with JavaCV 1.0?

[saudet]

Given the lack of feedback, I'm assuming this has since been fixed in FFmpeg, but please let me know if this isn't the case. Thanks!