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lavc/libmp3lame: add comments about CBR/VBR modes

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Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
This commit is contained in:
Timothy Gu 2013-10-23 20:57:36 -07:00 committed by Stefano Sabatini
parent 683d9cb1f2
commit 07e7bc9cbd
1 changed files with 2 additions and 2 deletions
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4
libavcodec/libmp3lame.c
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@ -115,11 +115,11 @@ static av_cold int mp3lame_encode_init(AVCodecContext *avctx)
lame_set_quality(s->gfp, avctx->compression_level);
/* rate control */
if (avctx->flags & CODEC_FLAG_QSCALE) {
if (avctx->flags & CODEC_FLAG_QSCALE) { // VBR
lame_set_VBR(s->gfp, vbr_default);
lame_set_VBR_quality(s->gfp, avctx->global_quality / (float)FF_QP2LAMBDA);
} else {
if (avctx->bit_rate)
if (avctx->bit_rate) // CBR
lame_set_brate(s->gfp, avctx->bit_rate / 1000);
}