[FFmpeg-devel] [PATCH] Scale libFDK encoder VBR mode with FF_QP2LAMBDA

[FFmpeg-devel] [PATCH] Scale libFDK encoder VBR mode with FF_QP2LAMBDA

[JonHGee]

VBR mode currently does not account for scaling when using -aq options with libfdk, resulting in clamping to vbr mode 5 whenever a value >0 is provided.  Adjusting for the scaling factor for proper VBR support.

---
 libavcodec/libfdk-aacenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/libfdk-aacenc.c b/libavcodec/libfdk-aacenc.c
index 54549de473..da211baf51 100644
--- a/libavcodec/libfdk-aacenc.c
+++ b/libavcodec/libfdk-aacenc.c
@@ -230,7 +230,7 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
     }
 
     if (avctx->flags & AV_CODEC_FLAG_QSCALE || s->vbr) {
-        int mode = s->vbr ? s->vbr : avctx->global_quality;
+        int mode = s->vbr ? s->vbr : avctx->global_quality / FF_QP2LAMBDA;
         if (mode <  1 || mode > 5) {
             av_log(avctx, AV_LOG_WARNING,
                    "VBR quality %d out of range, should be 1-5\n", mode);
-- 
2.39.2.637.g21b0678d19-goog

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