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indeo: check for reference when inheriting mvs
The same is done already for qdelta. Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org
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@ -603,7 +603,7 @@ static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
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if (band->inherit_qdelta && ref_mb)
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mb->q_delta = ref_mb->q_delta;
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if (band->inherit_mv) {
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if (band->inherit_mv && ref_mb) {
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/* motion vector inheritance */
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if (mv_scale) {
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mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
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