From 3fa8f263abf90650b62d43cb532cdb8cc5bd7c13 Mon Sep 17 00:00:00 2001 From: hexpointer Date: Fri, 7 Jul 2017 10:54:47 +0100 Subject: [PATCH] libswresample: check input to swr_convert_frame for NULL When 'out' is an AVFrame that does not have buffers preallocated, swr_convert_frame tries to allocate buffers of the right size. However in calculating this size it failed to check for whether 'in' is NULL (requesting that swr's internal buffers are to be flushed). Signed-off-by: Michael Niedermayer --- libswresample/swresample_frame.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/libswresample/swresample_frame.c b/libswresample/swresample_frame.c index 71d3ed711a..2853266d6c 100644 --- a/libswresample/swresample_frame.c +++ b/libswresample/swresample_frame.c @@ -139,9 +139,10 @@ int swr_convert_frame(SwrContext *s, if (out) { if (!out->linesize[0]) { - out->nb_samples = swr_get_delay(s, s->out_sample_rate) - + in->nb_samples*(int64_t)s->out_sample_rate / s->in_sample_rate - + 3; + out->nb_samples = swr_get_delay(s, s->out_sample_rate) + 3; + if (in) { + out->nb_samples += in->nb_samples*(int64_t)s->out_sample_rate / s->in_sample_rate; + } if ((ret = av_frame_get_buffer(out, 0)) < 0) { if (setup) swr_close(s);