[FFmpeg-devel] [PATCH]Set interlace properties when decoding old ffv1 in mov

[Carl Eugen Hoyos]

Hi!

FFV1 version 3 saves interlace properties per frame, for older streams, 
this patch fixes (a remaining part of) ticket #2190.

Please review, Carl Eugen
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diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index 17b8946..2fe511e 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -784,6 +784,13 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
 
     f->cur = p = f->picture.f;
 
+    if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
+        /* we have interlaced material flagged in container */
+        p->interlaced_frame = 1;
+        if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
+            p->top_field_first = 1;
+    }
+
     f->avctx = avctx;
     ff_init_range_decoder(c, buf, buf_size);
     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);