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ffmpeg: Fix initial dts for streamcopy, if the input packets lack dts.

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Fixes Ticket1138

Based on a patch by: Eelco Lempsink <eml@tupil.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-24 18:44:51 +02:00
parent ae0591f913
commit 44bd2f90a9
1 changed files with 10 additions and 1 deletions
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11
ffmpeg.c
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@ -235,6 +235,7 @@ typedef struct InputStream {
int64_t pts; ///< current pts of the decoded frame
double ts_scale;
int is_start; /* is 1 at the start and after a discontinuity */
int saw_first_ts;
int showed_multi_packet_warning;
AVDictionary *opts;
@ -2691,6 +2692,15 @@ static int output_packet(InputStream *ist, const AVPacket *pkt)
int64_t pkt_pts = AV_NOPTS_VALUE;
AVPacket avpkt;
if (!ist->saw_first_ts) {
ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
ist->pts = 0;
if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
}
ist->saw_first_ts = 1;
}
if (ist->next_dts == AV_NOPTS_VALUE)
ist->next_dts = ist->dts;
@ -2872,7 +2882,6 @@ static int init_input_stream(int ist_index, char *error, int error_len)
}
}
ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
ist->next_pts = AV_NOPTS_VALUE;
ist->next_dts = AV_NOPTS_VALUE;
ist->is_start = 1;