Results 2 comments of sh.l

**Use FFMPEG to replace OPENH264.** 1. open doubango/tinyDAV/src/tdav.c 2. remove code at line334~line336: ``` #if HAVE_OPENH264 tmedia_codec_plugin_register(tdav_codec_h264_cisco_base_plugin_def_t); #endif ```

santanu1122, can you provide logs?