I was wondering if you found a way to read frames and their info at the same time.Ĭurrently my code is as follows: video = VideoStream("rtsp://username: :554") A simple example for converting YUV420p to BGR using numpy and OpenCV is provided: The bytestream data returned is in no way prepared, decoded, or shaped into an array structure. Returns an end-of-file boolean flag, followed by a single frame's worth of the raw bytestream from the video. But for the raw acquisition of frames it can be significant. In most rendering instances the speed reduction is immeasurable due to other blocking processes. Note: Invoking 'showinfo' reduces the maximum speed raw frame data can ingest. silence_even_test : When True suppresses console warnings that an invalid resolution has been requested.When 'showinfo' is invoked no 'loglevel' output will be printed to console. Note: Various 'loglevel' settings implicitly silence this banner.hide_banner : Shows/hides ffmpeg's startup banner.loglevel : Sets ffmpeg's 'stderr' output to include/exclude certain data being printed to console.showinfo : When True invokes ffmpeg's ' showinfo' filter providing details about each frame as it is read.open_stream ( showinfo, loglevel, hide_banner, silence_even_test) config(), AFTER requesting the output_resolution be changed in a previous call. This is only important to note if you were to request the crop in a separate call to. Note: When crop_rect is set, it overrides the. output_resolution : Accepts a list / tuple as declaring the final scaling of the video, forcing the output to match this resolution.crop_rect : Accepts a list / tuple as for cropping the video's input.end_hms : Stop reading frames at this time* in the video.start_hms : Read frames starting from this time* in the video : ("seek" equivalent).config ( start_hms, end_hms, crop_rect, output_resolution) However, most source files and use cases will benefit by using the default configuration and converting the pixel data to other formats as needed. Note: By setting color and bytes_per_pixel you can ingest video into any pixel format ffmpeg supports.
bytes_per_pixel : The number of bytes (not bits) that your pixel format uses to store a pixel : By default 1.5 (as per 'yuv420p').color : The pixel format you are requesting from FFmpeg : By default 'yuv420p' (recommended).path : The path to your video file as a string : '/videos/my_video.mp4'.VideoStream ( path, color, bytes_per_pixel) The next 420x360x3 bytes afer that will represent the second frame, etc.From ffmpeg_videostream import VideoStream video = VideoStream( "my_video.mp4") If the video has a size of 420x320 pixels, then the first 420x360x3 bytes outputed byįFMPEG will give the RGB values of the pixels of the first frame, line by line, top to bottom. Now we just have to read the output of FFMPEG. It can be omitted most of the time in Python 2 but not in Python 3 where its default value is pretty small. In sp.Popen, the bufsize parameter must be bigger than the size of one frame (see below). The format image2pipe and the - at the end tell FFMPEG that it is being used with a pipe by another program. In the code above -i myHolidays.mp4 indicates the input file, while rawvideo/rgb24 asks for a raw RGB output. Import subprocess as sp command = pipe = sp.
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