some quick encoding tips

feel free to extend, change, fix spelling and grammer and the formatting ...

Originally committed as revision 7400 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/faq.texi

@@ -195,6 +195,23 @@ CAVLC
 ffmpeg -i input -acodec aac -ab 128 -vcodec h264 -b 1200kb -ar 48000 -mbd 2 -coder 1 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -title X -f psp -flags loop -trellis 2 -partitions parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 output.mp4
 @end table
 
+@section Which are good parameters for encoding high quality MPEG4?
+
+-mbd rd -flags +4mv+trell+aic -cmp 2 -subcmp 2 -g 300 -pass 1/2
+things to try: -bf 2, -flags qprd, -flags mv0, -flags skiprd
+
+@section Which are good parameters for encoding high quality MPEG1/MPEG2?
+
+-mbd rd -flags +trell -cmp 2 -subcmp 2 -g 100 -pass 1/2
+but beware the -g 100 might cause problems with some decoders
+things to try: -bf 2, -flags qprd, -flags mv0, -flags skiprd
+
+@section Interlaced video looks very bad when encoded with ffmpeg, whats wrong?
+
+You should use -flags +ilme+ildct and maybe -flags +alt for interlaced
+material, and try -top 0/1 if the result looks really trashed
+
+
 @section How can I read DirectShow files?
 
 If you have built FFmpeg with @code{./configure --enable-avisynth}