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dvdsubenc: set frame size in extradata.
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@ -398,6 +398,8 @@ static int dvdsub_init(AVCodecContext *avctx)
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memcpy(dvdc->global_palette, default_palette, sizeof(dvdc->global_palette));
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av_bprint_init(&extradata, 0, 1);
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if (avctx->width && avctx->height)
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av_bprintf(&extradata, "size: %dx%d\n", avctx->width, avctx->height);
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av_bprintf(&extradata, "palette:");
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for (i = 0; i < 16; i++)
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av_bprintf(&extradata, " %06"PRIx32"%c",
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