[MEncoder-users] vrc_minrate minimum?

[Jan Paul Schmidt]

While encoding with MPEG I stumbled over the warning:

	[mpeg2video @ 0x855f020]Warning min_rate > 0 but min_rate != max_rate 
isn't recommended!

This comes directly from mpegvideo.c in libavcodec.

The interesting point is, you can't specify vrc_minrate=0 because the 
allowed minimum is defined as 4 in libmpcodecs/ve_lavc.c.

ffmpeg itself uses minrate=0 in the targets (-target) svcd and dvd, so 
this should do no harm, no?

jps

--- ve_lavc.c.orig      2005-06-12 14:14:50.000000000 +0200
+++ ve_lavc.c   2005-06-12 14:15:17.000000000 +0200
@@ -207,7 +207,7 @@
         {"vrc_eq", &lavc_param_rc_eq, CONF_TYPE_STRING, 0, 0, 0, NULL},
         {"vrc_override", &lavc_param_rc_override_string, 
CONF_TYPE_STRING, 0, 0, 0, NULL},
         {"vrc_maxrate", &lavc_param_rc_max_rate, CONF_TYPE_INT, 
CONF_RANGE, 4, 24000000, NULL},
-       {"vrc_minrate", &lavc_param_rc_min_rate, CONF_TYPE_INT, 
CONF_RANGE, 4, 24000000, NULL},
+       {"vrc_minrate", &lavc_param_rc_min_rate, CONF_TYPE_INT, 
CONF_RANGE, 0, 24000000, NULL},
         {"vrc_buf_size", &lavc_param_rc_buffer_size, CONF_TYPE_INT, 
CONF_RANGE, 4, 24000000, NULL},
         {"vrc_buf_aggressivity", &lavc_param_rc_buffer_aggressivity, 
CONF_TYPE_FLOAT, CONF_RANGE, 0.0, 99.0, NULL},
         {"vrc_init_cplx", &lavc_param_rc_initial_cplx, CONF_TYPE_FLOAT, 
CONF_RANGE, 0.0, 9999999.0, NULL},