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vf_overlay: get rid of pointless messing with timebase. 

Output frames correspond 1:1 to input frames on the main input.
So use the main input timebase for output.
This commit is contained in:
Anton Khirnov 2012-09-30 09:49:53 +02:00
parent cd15b7c03d
commit ab35ec29a4
1 changed files with 4 additions and 21 deletions
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25
libavfilter/vf_overlay.c
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@ -181,24 +181,10 @@ fail:
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
int exact;
// common timebase computation:
AVRational tb1 = ctx->inputs[MAIN ]->time_base;
AVRational tb2 = ctx->inputs[OVERLAY]->time_base;
AVRational *tb = &ctx->outputs[0]->time_base;
exact = av_reduce(&tb->num, &tb->den,
av_gcd((int64_t)tb1.num * tb2.den,
(int64_t)tb2.num * tb1.den),
(int64_t)tb1.den * tb2.den, INT_MAX);
av_log(ctx, AV_LOG_VERBOSE,
"main_tb:%d/%d overlay_tb:%d/%d -> tb:%d/%d exact:%d\n",
tb1.num, tb1.den, tb2.num, tb2.den, tb->num, tb->den, exact);
if (!exact)
av_log(ctx, AV_LOG_WARNING,
"Timestamp conversion inexact, timestamp information loss may occurr\n");
outlink->w = ctx->inputs[MAIN]->w;
outlink->h = ctx->inputs[MAIN]->h;
outlink->time_base = ctx->inputs[MAIN]->time_base;
return 0;
}
@ -217,10 +203,9 @@ static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
if (!outpicref)
return AVERROR(ENOMEM);
outpicref->pts = av_rescale_q(outpicref->pts, ctx->inputs[MAIN]->time_base,
ctx->outputs[0]->time_base);
if (!over->overpicref || over->overpicref->pts < outpicref->pts) {
if (!over->overpicref ||
av_compare_ts(over->overpicref->pts, inlink->time_base,
outpicref->pts, ctx->inputs[OVERLAY]->time_base) < 0) {
AVFilterBufferRef *old = over->overpicref;
over->overpicref = NULL;
ff_request_frame(ctx->inputs[OVERLAY]);
@ -242,8 +227,6 @@ static int start_frame_overlay(AVFilterLink *inlink, AVFilterBufferRef *inpicref
inlink->cur_buf = NULL;
avfilter_unref_bufferp(&over->overpicref);
over->overpicref = inpicref;
over->overpicref->pts = av_rescale_q(inpicref->pts, ctx->inputs[OVERLAY]->time_base,
ctx->outputs[0]->time_base);
return 0;
}