[MEncoder-users] B-frames and GOP with MPEG-2 for DVD

[James Tripp]

Nico Sabbi <nsabbi at email.it> wrote:>my eyes scream against b-frames, at least in mpeg1/2/4 encodes :)
>I've always seen many more artefacts with b-frames than without, at any bitrate
 
 
 Bitrate should matter.

This is one of the last things I tried

mencoder.exe tey.avs -o MPHQ1.m2v -ovc lavc -lavcopts vcodec=mpeg2video:threads=2:ilme:ildct:alt:top=1:vpass=1:turbo:vqmin=1:lmin=0.01:vqblur=0:vqscale=2:vrc_maxrate=9800:vrc_buf_size=1835:keyint=15:vqcomp=0.75:vmax_b_frames=2:vb_qfactor=1.25:vb_qoffset=0.0:vi_qfactor=1.0:vi_qoffset=0.0:me_range=128:preme=2:mbd=2:aspect=16/9:inter_matrix=20,21,22,23,24,25,26,27,21,21,22,23,24,25,26,28,22,22,23,24,25,26,28,30,23,23,24,25,26,28,29,32,24,24,25,26,28,31,33,35,25,25,26,28,31,34,36,39,26,26,28,29,33,36,41,43,27,28,30,32,35,39,43,48:intra_matrix=8,16,16,16,17,17,18,19,16,16,16,16,17,18,19,20,16,16,16,17,18,19,20,22,16,16,17,18,19,21,23,26,17,17,18,19,21,24,27,31,17,18,19,21,24,28,33,40,18,19,20,23,27,33,42,51,19,20,22,26,31,40,51,64 -of rawvideo -ffourcc MPG2

mencoder.exe tey.avs -o MPHQ2.m2v -ovc lavc -lavcopts vcodec=mpeg2video:threads=2:autoaspect:ilme:ildct:alt:top=1:vpass=3:vqmin=1:lmin=0.01:vqblur=0:vbitrate=3580:vrc_maxrate=9800:vrc_buf_size=1835:keyint=15:vqcomp=0.75:vmax_b_frames=2:vb_qfactor=1.25:vb_qoffset=0.0:vi_qfactor=1.0:vi_qoffset=0.0:me_range=128:preme=2:dia=3:predia=3:mbd=2:mbcmp=256:precmp=256:cmp=256:subcmp=256:mv0:trell:cbp:dc=8:psnr:aspect=16/9:inter_matrix=20,21,22,23,24,25,26,27,21,21,22,23,24,25,26,28,22,22,23,24,25,26,28,30,23,23,24,25,26,28,29,32,24,24,25,26,28,31,33,35,25,25,26,28,31,34,36,39,26,26,28,29,33,36,41,43,27,28,30,32,35,39,43,48:intra_matrix=8,16,16,16,17,17,18,19,16,16,16,16,17,18,19,20,16,16,16,17,18,19,20,22,16,16,17,18,19,21,23,26,17,17,18,19,21,24,27,31,17,18,19,21,24,28,33,40,18,19,20,23,27,33,42,51,19,20,22,26,31,40,51,64 -of rawvideo -ffourcc MPG2

extremely slow, but good,  and metric wise, unparalleled.

Could you send me your commands so I might try them.

ty

 
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