From b56e029bdc9a68ed9decc7d3ad77e15aa5f4071d Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 28 Feb 2013 20:24:05 +0100
Subject: [PATCH] avformat/lavfi: force probesize to cover at least 30 frames
This ensures that fps and other values are estimated correctly,
the probesize also is intended to limit disk/protocol reads which
does not apply to lavfi inputs at all.
Fixes Ticket1051
Something similar could be usefull to other input devices
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
libavdevice/lavfi.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavdevice/lavfi.c b/libavdevice/lavfi.c
index e4cacb640e1..3b6f0c382cb 100644
--- a/libavdevice/lavfi.c
+++ b/libavdevice/lavfi.c
@@ -282,6 +282,10 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
st->codec->height = link->h;
st ->sample_aspect_ratio =
st->codec->sample_aspect_ratio = link->sample_aspect_ratio;
+ avctx->probesize = FFMAX(avctx->probesize,
+ link->w * link->h *
+ av_get_padded_bits_per_pixel(av_pix_fmt_desc_get(link->format)) *
+ 30);
} else if (link->type == AVMEDIA_TYPE_AUDIO) {
st->codec->codec_id = av_get_pcm_codec(link->format, -1);
st->codec->channels = av_get_channel_layout_nb_channels(link->channel_layout);
--
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