codecparsers: Fix MPEG-1 aspect ratio table
The values defined in ISO/IEC 11172-2 are different from those used so far. The standard is not freely available on the Web. However, FFmpeg has a similar table in their source code, https://git.ffmpeg.org/gitweb/ffmpeg.git/blob/n6.0:/libavcodec/mpeg12data.c#l359 .