There is definitely a discrepancy between the aspect ratio information embedded in the stream, vs. what’s in the container:
Width : 700
Width : 700 pixels
Height : 568
Height : 568 pixels
Stored_Width : 704
Stored_Height : 576
Sampled_Width : 700
Sampled_Height : 568
Pixel aspect ratio : 1.455
Original pixel aspect ratio : 1.000
Display aspect ratio : 1.793
Display aspect ratio : 16:9
Original display aspect ratio : 1.232
Original display aspect ratio : 5:4
Link with more info:Roku ignores aspect ratio flag when direct playing - #3 by Volts
And extracting just the h264 gives a file with the wrong ratio. I think this can be fixed with an ffmpeg bitstream filter. Back in a few!