From b67ca8a7a5f443de5eacac9ed4c5d94dfe685a5b Mon Sep 17 00:00:00 2001 From: Marton Balint Date: Sat, 11 Jun 2022 19:59:32 +0200 Subject: avdevice/pulse_audio_dec: reduce default fragment size Reduces default fragment size from the pulse audio default of 2 sec to 50 ms. This also has an effect on the size of the returned frames, which will be around 50 ms as well, making timestamps more accurate. This should fix the regression in ticket #9776. Pulseaudio timestamps for monitor sources are still pretty inaccurate for me, but I don't see how else should we query latencies from the library. Signed-off-by: Marton Balint --- libavdevice/pulse_audio_dec.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'libavdevice') diff --git a/libavdevice/pulse_audio_dec.c b/libavdevice/pulse_audio_dec.c index ed094fd250..2355b91776 100644 --- a/libavdevice/pulse_audio_dec.c +++ b/libavdevice/pulse_audio_dec.c @@ -162,7 +162,12 @@ static av_cold int pulse_read_header(AVFormatContext *s) return AVERROR(ENOMEM); } - attr.fragsize = pd->fragment_size; + if (pd->fragment_size == -1) { + // 50 ms fragments/latency by default seem good enough + attr.fragsize = pa_frame_size(&ss) * (pd->sample_rate / 20); + } else { + attr.fragsize = pd->fragment_size; + } if (s->url[0] != '\0' && strcmp(s->url, "default")) device = s->url; -- cgit v1.2.1