Issue title: DJIVideoParser: H264_Decoder should use PIX_FMT_RGB24
 Issue body: The current FFMPEG pixel format used by the video parser is PIX_FMT_RGBA, which is 4 bytes per pixel. Since the alpha byte is always 0xff, you can save 25% of your buffer space by using PIX_FMT_RGB24 instead. You will need to change all the "* 4" to "* 3" (or define BYTES_PER_PIXEL and use that instead), plus change the VideoFeedRenderer38d1:d2b4:3d06:83e8:96a5:8c2:893d:aba5HandleImageTexture to use GL_RGB instead of GL_RGBA.
 Comments: 
 Comment 0: Hi, there are two options for you to ask for help:

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