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avformat/lavfi: force probesize to cover at least 30 frames

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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>
This commit is contained in:
Michael Niedermayer 2013-02-28 20:24:05 +01:00
parent 33240dfa9a
commit b56e029bdc
1 changed files with 4 additions and 0 deletions
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4
libavdevice/lavfi.c
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@ -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);