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ffmpeg: inject a aresample filter for -async 

Based on similar code from anton

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-05-19 18:50:10 +02:00
parent 21d8a80e30
commit 9d30a96aa1
1 changed files with 23 additions and 0 deletions
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ffmpeg.c
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@ -867,6 +867,29 @@ static int configure_audio_filters(FilterGraph *fg, AVFilterContext **in_filter,
*out_filter = format;
}
if (audio_sync_method > 0) {
AVFilterContext *aswr;
char args[256] = {0};
av_strlcatf(args, sizeof(args), "min_comp=0.001:min_hard_comp=%f", audio_drift_threshold);
if (audio_sync_method > 1)
av_strlcatf(args, sizeof(args), ":max_soft_comp=%f", audio_sync_method/(double)icodec->sample_rate);
av_log(NULL, AV_LOG_INFO, "-async %d is forwarded to lavfi similarly to -af aresample=%s\n", audio_sync_method, args);
ret = avfilter_graph_create_filter(&aswr, avfilter_get_by_name("aresample"),
"aresample", args, NULL, fg->graph);
if (ret < 0)
return ret;
ret = avfilter_link(*in_filter, 0, aswr, 0);
if (ret < 0)
return ret;
*in_filter = aswr;
}
#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
AVFilterContext *filt_ctx; \
\