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-rw-r--r--libavcodec/svq1.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/svq1.c b/libavcodec/svq1.c
index a167ac9c8f..957176e386 100644
--- a/libavcodec/svq1.c
+++ b/libavcodec/svq1.c
@@ -1355,7 +1355,7 @@ static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
init_put_bits(&s->pb, buf, buf_size);
*p = *pict;
- p->pict_type = avctx->frame_number % avctx->gop_size ? P_TYPE : I_TYPE;
+ p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? P_TYPE : I_TYPE;
p->key_frame = p->pict_type == I_TYPE;
svq1_write_header(s, p->pict_type);