[FFmpeg-cvslog] avcodec/mpegvideo_enc: workaround applications specifying intra dc level based on 8 and othes based on 0bit

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Jul 15 19:12:00 2014 +0200| [97f86cd97604b705d6065be8088dce9cb150dc25] | committer: Michael Niedermayer

avcodec/mpegvideo_enc: workaround applications specifying intra dc level based on 8 and othes based on 0bit

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=97f86cd97604b705d6065be8088dce9cb150dc25
---

 libavcodec/mpegvideo_enc.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 9c4f2a5..e88b4f3 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -335,6 +335,13 @@ av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
     s->mpeg_quant         = avctx->mpeg_quant;
     s->rtp_mode           = !!avctx->rtp_payload_size;
     s->intra_dc_precision = avctx->intra_dc_precision;
+
+    // workaround some differences between how applications specify dc precission
+    if (s->intra_dc_precision < 0) {
+        s->intra_dc_precision += 8;
+    } else if (s->intra_dc_precision >= 8)
+        s->intra_dc_precision -= 8;
+
     s->user_specified_pts = AV_NOPTS_VALUE;
 
     if (s->gop_size <= 1) {