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avcodec/mpeg12dec: ignore picture start code in extradata for AVID mpeg2 files

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AVID IMX MPEG2 files in MOV seems to have extradata like this:

00000000: 0000 0018 4143 4c52 4143 4c52 3030 3031  ....ACLRACLR0001
00000010: 0000 0001 0000 0000                      ........

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2023-06-25 20:38:32 +02:00
parent b7f4d5fa7e
commit 4e27b485d7
1 changed files with 5 additions and 0 deletions
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5
libavcodec/mpeg12dec.c
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@ -2522,6 +2522,11 @@ static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
}
picture_start_code_seen = 1;
if (buf == avctx->extradata && avctx->codec_tag == AV_RL32("AVmp")) {
av_log(avctx, AV_LOG_WARNING, "ignoring picture start code in AVmp extradata\n");
break;
}
if (s2->width <= 0 || s2->height <= 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
s2->width, s2->height);