From 07e7bc9cbda12921ddf0ae6bbbf9328f29c3c63e Mon Sep 17 00:00:00 2001
From: Timothy Gu <timothygu99@gmail.com>
Date: Wed, 23 Oct 2013 20:57:36 -0700
Subject: [PATCH] lavc/libmp3lame: add comments about CBR/VBR modes
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
---
libavcodec/libmp3lame.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/libmp3lame.c b/libavcodec/libmp3lame.c
index 6402d3e0e3e..0fb9c6a3b15 100644
--- a/libavcodec/libmp3lame.c
+++ b/libavcodec/libmp3lame.c
@@ -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);
}
--
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