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doc/examples/transcode: stop using decoder's AVCodecContext.time_base

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The contents of this field are not defined for decoding. Use
pkt_timebase, which is the timebase of demuxed packets.

Drop a tautological av_packet_rescale_ts() call, as the stream and
decoder timebases are the same.
This commit is contained in:
Anton Khirnov 2023-05-31 16:58:50 +02:00
parent 828d3b4432
commit 811b0e02be
1 changed files with 2 additions and 5 deletions
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7
doc/examples/transcode.c
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@ -271,7 +271,7 @@ static int init_filter(FilteringContext* fctx, AVCodecContext *dec_ctx,
snprintf(args, sizeof(args), snprintf(args, sizeof(args),
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d", "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt, dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt,
dec_ctx->time_base.num, dec_ctx->time_base.den, dec_ctx->pkt_timebase.num, dec_ctx->pkt_timebase.den,
dec_ctx->sample_aspect_ratio.num, dec_ctx->sample_aspect_ratio.num,
dec_ctx->sample_aspect_ratio.den); dec_ctx->sample_aspect_ratio.den);
@ -311,7 +311,7 @@ static int init_filter(FilteringContext* fctx, AVCodecContext *dec_ctx,
av_channel_layout_describe(&dec_ctx->ch_layout, buf, sizeof(buf)); av_channel_layout_describe(&dec_ctx->ch_layout, buf, sizeof(buf));
snprintf(args, sizeof(args), snprintf(args, sizeof(args),
"time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=%s", "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=%s",
dec_ctx->time_base.num, dec_ctx->time_base.den, dec_ctx->sample_rate, dec_ctx->pkt_timebase.num, dec_ctx->pkt_timebase.den, dec_ctx->sample_rate,
av_get_sample_fmt_name(dec_ctx->sample_fmt), av_get_sample_fmt_name(dec_ctx->sample_fmt),
buf); buf);
ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
@ -549,9 +549,6 @@ int main(int argc, char **argv)
av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter the frame\n"); av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter the frame\n");
av_packet_rescale_ts(packet,
ifmt_ctx->streams[stream_index]->time_base,
stream->dec_ctx->time_base);
ret = avcodec_send_packet(stream->dec_ctx, packet); ret = avcodec_send_packet(stream->dec_ctx, packet);
if (ret < 0) { if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Decoding failed\n"); av_log(NULL, AV_LOG_ERROR, "Decoding failed\n");