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Code Issues Releases Activity

fftools/ffmpeg: set AVFrame.time_base for decoded frames

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Makes it easier to keep track of the timebase the frames are in.
This commit is contained in:
Anton Khirnov 2023-04-22 16:42:12 +02:00
parent b6e7d64394
commit 6bbea932ca
1 changed files with 12 additions and 10 deletions
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22
fftools/ffmpeg.c
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@ -855,6 +855,8 @@ static int decode(InputStream *ist, AVCodecContext *avctx,
fd->idx = avctx->frame_num - 1;
}
frame->time_base = avctx->pkt_timebase;
*got_frame = 1;
}
@ -885,7 +887,6 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output,
AVFrame *decoded_frame = ist->decoded_frame;
AVCodecContext *avctx = ist->dec_ctx;
int ret, err = 0;
AVRational decoded_frame_tb;
update_benchmark(NULL);
ret = decode(ist, avctx, decoded_frame, got_output, pkt);
@ -909,23 +910,24 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output,
ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
decoded_frame->sample_rate;
if (decoded_frame->pts != AV_NOPTS_VALUE) {
decoded_frame_tb = ist->st->time_base;
}else {
if (decoded_frame->pts == AV_NOPTS_VALUE) {
decoded_frame->pts = ist->dts;
decoded_frame_tb = AV_TIME_BASE_Q;
decoded_frame->time_base = AV_TIME_BASE_Q;
}
if (pkt && pkt->duration && ist->prev_pkt_pts != AV_NOPTS_VALUE &&
pkt->pts != AV_NOPTS_VALUE && pkt->pts - ist->prev_pkt_pts > pkt->duration)
ist->filter_in_rescale_delta_last = AV_NOPTS_VALUE;
if (pkt)
ist->prev_pkt_pts = pkt->pts;
if (decoded_frame->pts != AV_NOPTS_VALUE)
decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
(AVRational){1, decoded_frame->sample_rate},
decoded_frame->nb_samples,
if (decoded_frame->pts != AV_NOPTS_VALUE) {
AVRational tb_filter = (AVRational){1, decoded_frame->sample_rate};
decoded_frame->pts = av_rescale_delta(decoded_frame->time_base, decoded_frame->pts,
tb_filter, decoded_frame->nb_samples,
&ist->filter_in_rescale_delta_last,
(AVRational){1, decoded_frame->sample_rate});
tb_filter);
decoded_frame->time_base = tb_filter;
}
ist->nb_samples = decoded_frame->nb_samples;
err = send_frame_to_filters(ist, decoded_frame);