mirror of https://git.ffmpeg.org/ffmpeg.git
movenc: fix NULL reference in mov_write_tkhd_tag
st may be NULL when there are more mov streams than AVStreams, e.g. when chapters are present.
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@ -1217,7 +1217,7 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVTrack *track, AVStream *st)
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avio_wb32(pb, 0); /* reserved */
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avio_wb32(pb, 0); /* reserved */
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avio_wb16(pb, 0); /* layer */
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avio_wb16(pb, st->codec->codec_type); /* alternate group) */
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avio_wb16(pb, st ? st->codec->codec_type : 0); /* alternate group) */
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/* Volume, only for audio */
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if(track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
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avio_wb16(pb, 0x0100);
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