Converting .webm videos to .h264 format.
Converting WebM Videos directly to H.264 Encoded Video Files (.webm to .h264 conversion) is certainly possible and should be quite straightforward.
Try using one of several video editing programs or (online) conversion tools, such as the Freemake Video Converter or MediaCoder, which allow users to import WEBM videos and export them in H264 format.
A free video converter offering high-quality conversions between many video formats