demux: avformat: blacklist raw h264
demux: avformat: blacklist raw h264

refs #17174
Same issue as raw HEVC, no timestamps output
so no PCR, and PCR can't be set by packetizer.

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc