julapy / ofxiosvideowriter Goto Github PK

I think (not 100% sure -- just going on what I saw just now) that the widths of the video writer need to be aligned on 16 pixels or you get some weird sheering effect. It might be nice to add a few convenience functions and a getWidth() function to make it easier.

Like the title says, I get about a second of black frames at the beginning of every video. There is some chatter about this elsewhere here, here, here

I don't remember noticing this issue until audio recording was added in. Perhaps it has something to do with the audio buffers being added before the video is ready, as one of the threads above suggests.

It may be a separate issue, but also possibly related. I've noticed that the recorded framerate is a bit variable. It usually comes out to be something like 28.2 or 28.76, but never an even 29.97 (or 30). Wonder if you've noticed this as well?

The addon works great for the first recording, but if I try to use it more than once after launching the app it crashes with :

'NSInvalidArgumentException', reason: '*** -[AVAssetWriter initWithURL:fileType:error:] invalid parameter not satisfying: outputURL != ((void *)0)'

FWIW I added the saveMovieToCameraRoll method call finishRecording() to ofxiOSVideoWriter.mm. So now it looks like

void ofxiOSVideoWriter::finishRecording() {
    if((videoWriter == nil) ||
       [videoWriter isWriting] == NO) {
        return;
    }

    [videoWriter finishRecording];
    [videoWriter saveMovieToCameraRoll];

    killTextureCache();
    cout<<"Finishing"<<endl;
}

And in my ofApp I'm calling the videoWriter like so in touchDown:

     save = !save;
      if(save){
          videoWriter.startRecording();
      } else {
          videoWriter.finishRecording();
      }

I logged the fileURL being passed into the startRecording method and found that on the second go round the url=null. I traced this to saveMovieToCameraRoll commented out line ~586 which was setting self.outputUrl = nil;. Once I did that is seems to save for multiple videos :D

how can i use it for swift?

I have downloaded the project to the local，but，Project error，cannot run，what should I do？I would like to know,how this project use in iOS develop,3Q

The audio input seems to cut off after the video input resulting in my video having the last frame repeated while still playing the extra audio recording at the end.

I'm using iOS 11 on an iPhone SE, running some semi-intensive OpenCV calculations.

I am not 100% positive about this -- more of an intuition -- but I think I'm seeing some dropped frames using this addon -- specifically, if I draw the frame number into the video, I see that some frames are duplicated while others are skipped --- ie, you'll see 28,29,31,31,32....

(the issue sounds similar to BradLarson/GPUImage#1501, which has similarish issues about the black frames at the start BradLarson/GPUImage#52)

haven't dug into this too much, maybe useful?
http://tuohuang.info/gpuimage-video-merge-fix-movie-writer

ofMain.h ofxiOSVideoPlayer.h ofxiOSSoundPlayer.h ofxiOSEAGLView.h not found

Hi,
I'm trying to use this addon with the latest version of ios openframeworks (for iPad). When I toggle the record button, it shows "Recording" on the top left corner, but the video is stuck in the first frame, and the music stops, and the current frame number stays at 000000. In the console, it shows a warning:
[warning] ofGLProgrammableRenderer: draw(): texture is not allocated

When I toggle the recording button again, the music and video starts to run again. Is this expected behavior? Where can I find the recorded video?

Thanks in advance!

Hi,

I am developing the app which required to video recording. I looked into iosScreenRecordExample but it record from video player.
But I need to record audio from microphone.

Please help me.

Like the title says, wondering if it's possible to record higher bitrate videos.

I saw in the video settings there is
AVVideoAverageBitRateKey: [NSNumber numberWithInt:bitrate]

have you tried it?