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avcodec/mjpegdec: Switch default interlaced polarity for MJPG to 1

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Fixes Ticket3229

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-19 18:01:04 +01:00
parent 493296800c
commit dde16f5aae
1 changed files with 3 additions and 0 deletions
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3
libavcodec/mjpegdec.c
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@ -131,6 +131,9 @@ av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
s->interlace_polarity = 1; /* bottom field first */
av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
} else if (avctx->field_order == AV_FIELD_UNKNOWN) {
if (avctx->codec_tag == AV_RL32("MJPG"))
s->interlace_polarity = 1;
}
if ( avctx->extradata_size > 8