How to create and read stream file?

[K0rkunc]

hello, I have examined your image viewer example, but I could not understand it because it is too complicated..

please don't tell me How to create the stream output of the gif file and save it in the directory I want. Can you describe how to read the -stream file and copy it to the canvas?

When I upload the image file to ram it consumes a lot of ram

[K0rkunc]

@marcmerlin @hzeller

[hzeller]

The include/content-streamer.h has everything you need.

First, you need to create a StreamIO of your liking, if you read from a file, that will be a FileStreamIO. Then you can use that to get the frames with a StreamReader

So roughly something like this:

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "content-streamer.h"

int main() {
   // initialize matrix ...
   FrameCanvas *offscreen_canvas = matrix->CreateFrameCanvas();

  const int fd = open("/path/to/file", O_RDONLY);
  rgb_matrix::FileStreamIO io(fd);
  rgb_matrix::StreamReader reader(&io);
  uint32_t wait_time;
  for (;;) {
    while (reader.getNext(offscreen_canvas,  &wait_time)) {
      offscreen_canvas = matrix->SwapOnVSync(offscreen_canvas(offscreen_canvas);
      usleep(wait_time);
    }
    reader.Rewind();
  }
}

[K0rkunc]

getting error

[hzeller]

The example was a rough guideline to get you started, it is not necessarily compiling.

[K0rkunc]

Why no member getnext

[hzeller]

It is upper-case: GetNext() https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/include/content-streamer.h#L92

[K0rkunc]

It is upper-case: GetNext() https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/include/content-streamer.h#L92

i tried but panel dont lights but program works

[K0rkunc]

solved im creat animation file and work how to get frame num ?

[K0rkunc]

and rgb matrix seettings not work

[hzeller]

It is a stream, you don't know the number of frames beforehand, but you'll know when the stream ends, because GetNext() returns false. The second message is cryptic, it is not clear what you mean. Remember, if you want someone to help you, you need to provide all relevant information (set-up, settings, command line flags, expectation, observed result instead...).

[K0rkunc]

my masters We make rgb matrix settings at the start of main options.brightness options.cols... etc..

these settings I defined are not valid in stream file. Stream file opens with its own settings. How can I dictate my own settings to it?

Thank you very much for your time, I will give you a little more exposure.

actually my main problem is my program is in the following additional file, if you have time, please check it out.

I created 2 threads with one of these threads, I print coalescend image files on the canvas and play them.

With the second thread, I convert the scene transition from the picture file to a collage while the previous scene is playing, in order not to waste time.

but during this translation, there are tiny flickers on the screen. How do you think I can solve this problem?

Since my English is not good, I used translate, sorry for the word mistakes.

mycodes https://www.codepile.net/pile/pj00pmjn

[K0rkunc]

@hzeller When I use file stream it doesn't apply runtime options and matrix options. How can I fix this?