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dv: fix null ptr dereference
Fixes Ticket1640 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -419,9 +419,13 @@ static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c,
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void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
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{
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c->frames= frame_offset;
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if (c->ach)
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if (c->ach) {
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if (c->sys) {
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c->abytes= av_rescale_q(c->frames, c->sys->time_base,
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(AVRational){8, c->ast[0]->codec->bit_rate});
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}else
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av_log(c->fctx, AV_LOG_ERROR, "cannot adjust audio bytes\n");
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}
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c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
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c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
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}
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