avcodec/h264_ps: Show VUI and SPS overread messages just once per frame thread

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/h264_ps.c

@@ -579,7 +579,8 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
     }
 
     if (get_bits_left(gb) < 0) {
-        av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
+        av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
+                    &ps->overread_warning_printed[sps->vui_parameters_present_flag],
                "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
         if (!ignore_truncation)
             goto fail;

libavcodec/h264_ps.h

@@ -144,6 +144,8 @@ typedef struct H264ParamSets {
     /* currently active parameters sets */
     const PPS *pps;
     const SPS *sps;
+
+    int overread_warning_printed[2];
 } H264ParamSets;
 
 /**