diff --git a/libavcodec/mjpegenc_common.c b/libavcodec/mjpegenc_common.c index 31868c9bed..3038ebde6e 100644 --- a/libavcodec/mjpegenc_common.c +++ b/libavcodec/mjpegenc_common.c @@ -573,7 +573,7 @@ int ff_mjpeg_encode_stuffing(MpegEncContext *s) ff_mjpeg_escape_FF(pbc, s->esc_pos); - if((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height) + if((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height - 1) put_marker(pbc, RST0 + (mb_y&7)); s->esc_pos = put_bits_count(pbc) >> 3; fail: