Can I apply for a Thai visa from Vietnam and how long does it take for approval?

The user is planning to apply for a Thai visa while in Vietnam after participating in Muay Thai training in Bangkok. They inquire about the possibility of applying for the visa from Vietnam, whether it's faster to apply in person at an embassy, and what the typical processing time is for visa approval. Several comments provide insights that the visa can be processed online with reports of quick approvals, sometimes within 2 days. It is noted that approvals can occur even before physical arrival in Thailand.