From 0997c2504b25cbc2856800fc063395dcd40b2bf7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 2 Feb 2014 00:11:16 +0100 Subject: [PATCH] avdevice/v4l2: only use average frame rate if set It might be unset on some platforms with some drivers and some input Signed-off-by: Michael Niedermayer --- libavdevice/v4l2.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c index b4f65d388d..96a272c192 100644 --- a/libavdevice/v4l2.c +++ b/libavdevice/v4l2.c @@ -447,18 +447,20 @@ static int init_convert_timestamp(AVFormatContext *ctx, int64_t ts) return 0; } #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC) - now = av_gettime_monotonic(); - if (s->ts_mode == V4L_TS_MONO2ABS || - (ts <= now + 1 * AV_TIME_BASE && ts >= now - 10 * AV_TIME_BASE)) { - AVRational tb = {AV_TIME_BASE, 1}; - int64_t period = av_rescale_q(1, tb, ctx->streams[0]->avg_frame_rate); - av_log(ctx, AV_LOG_INFO, "Detected monotonic timestamps, converting\n"); - /* microseconds instead of seconds, MHz instead of Hz */ - s->timefilter = ff_timefilter_new(1, period, 1.0E-6); - if (!s->timefilter) - return AVERROR(ENOMEM); - s->ts_mode = V4L_TS_CONVERT_READY; - return 0; + if (ctx->streams[0]->avg_frame_rate.num) { + now = av_gettime_monotonic(); + if (s->ts_mode == V4L_TS_MONO2ABS || + (ts <= now + 1 * AV_TIME_BASE && ts >= now - 10 * AV_TIME_BASE)) { + AVRational tb = {AV_TIME_BASE, 1}; + int64_t period = av_rescale_q(1, tb, ctx->streams[0]->avg_frame_rate); + av_log(ctx, AV_LOG_INFO, "Detected monotonic timestamps, converting\n"); + /* microseconds instead of seconds, MHz instead of Hz */ + s->timefilter = ff_timefilter_new(1, period, 1.0E-6); + if (!s->timefilter) + return AVERROR(ENOMEM); + s->ts_mode = V4L_TS_CONVERT_READY; + return 0; + } } #endif av_log(ctx, AV_LOG_ERROR, "Unknown timestamps\n"); @@ -949,7 +951,8 @@ static int v4l2_read_header(AVFormatContext *s1) st->codec->codec_tag = MKTAG('Y', 'V', 'U', '9'); st->codec->width = s->width; st->codec->height = s->height; - st->codec->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8; + if (st->avg_frame_rate.den) + st->codec->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8; return 0; }