[libav-devel] [PATCH 5/6] cbs_h264: Add hack for pic_timing with no active SPS

Mark Thompson sw at jkqxz.net
Mon Dec 11 01:44:59 CET 2017


If there is exactly one possible SPS but it is not yet active then just
assume that it should be the active one.
---
 libavcodec/cbs_h264_syntax_template.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libavcodec/cbs_h264_syntax_template.c b/libavcodec/cbs_h264_syntax_template.c
index 0fe18441c..c2fd54682 100644
--- a/libavcodec/cbs_h264_syntax_template.c
+++ b/libavcodec/cbs_h264_syntax_template.c
@@ -561,6 +561,22 @@ static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
 
     sps = h264->active_sps;
     if (!sps) {
+        // If there is exactly one possible SPS but it is not yet active
+        // then just assume that it should be the active one.
+        int i, k = -1;
+        for (i = 0; i < H264_MAX_SPS_COUNT; i++) {
+            if (h264->sps[i]) {
+                if (k >= 0) {
+                    k = -1;
+                    break;
+                }
+                k = i;
+            }
+        }
+        if (k >= 0)
+            sps = h264->sps[k];
+    }
+    if (!sps) {
         av_log(ctx->log_ctx, AV_LOG_ERROR,
                "No active SPS for pic_timing.\n");
         return AVERROR_INVALIDDATA;
-- 
2.11.0



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