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avcodec: adjust encoders vp8 defaults littlebit

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This commit is contained in:
Ilkka Ollakka 2010-06-01 21:20:20 +03:00
parent e855bde0ae
commit ac3514edab
1 changed files with 29 additions and 3 deletions
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32
modules/codec/avcodec/encoder.c
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@ -600,10 +600,36 @@ int OpenEncoder( vlc_object_t *p_this )
libvpx-720p preset from libvpx ffmpeg-patch */
if( i_codec_id == CODEC_ID_VP8 )
{
/* Lets give bitrate tolerance */
p_context->bit_rate_tolerance = __MAX(2 * p_enc->fmt_out.i_bitrate, p_sys->i_vtolerance );
/* I used Harrison-stetson method here to get there values */
p_context->rc_max_rate = 3 * p_enc->fmt_out.i_bitrate;
p_context->rc_min_rate = p_enc->fmt_out.i_bitrate / 200;
/* seems that ffmpeg presets have 720p as divider for buffers */
if( p_enc->fmt_out.video.i_width >= 720 )
{
/* Check that we don't overrun users qmin/qmax values */
if( !var_GetInteger( p_enc, ENC_CFG_PREFIX "qmin" ) )
{
p_context->mb_qmin = p_context->qmin = 10 * FF_QP2LAMBDA;
p_context->mb_lmin = p_context->lmin = 10 * FF_QP2LAMBDA;
}
if( !var_GetInteger( p_enc, ENC_CFG_PREFIX "qmax" ) )
{
p_context->mb_qmax = p_context->qmax = 42 * FF_QP2LAMBDA;
p_context->mb_lmax = p_context->lmax = 42 * FF_QP2LAMBDA;
}
p_context->rc_max_rate = 24 * 1000 * 1000; //24M
p_context->rc_min_rate = 100 * 1000; // 100k
} else {
if( !var_GetInteger( p_enc, ENC_CFG_PREFIX "qmin" ) )
{
p_context->mb_qmin = p_context->qmin = FF_QP2LAMBDA;
p_context->mb_lmin = p_context->lmin = FF_QP2LAMBDA;
}
p_context->rc_max_rate = 1.5 * 1000 * 1000; //1.5M
p_context->rc_min_rate = 40 * 1000; // 40k
}
#if 0 /* enable when/if vp8 encoder is accepted in libavcodec */