From: Haihao Xiang <haihao.xi...@intel.com>
Since 2d924b3, sdl2_write_header() and sdl2_write_packet() are called
in two different threads. However SDL2 requires window creation and
rendering should be done in the same thread, otherwise it shows nothing
when specifying SDL2 output device.
$ ffmpeg -f lavfi -i yuvtestsrc -pix_fmt yuv420p -f sdl2 "sdl2"
Signed-off-by: Haihao Xiang <haihao.xi...@intel.com>
---
libavdevice/sdl2.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/libavdevice/sdl2.c b/libavdevice/sdl2.c
index 342a253dc0..c9f7f03c28 100644
--- a/libavdevice/sdl2.c
+++ b/libavdevice/sdl2.c
@@ -158,6 +158,11 @@ static int sdl2_write_trailer(AVFormatContext *s)
}
static int sdl2_write_header(AVFormatContext *s)
+{
+ return 0;
+}
+
+static int sdl2_init(AVFormatContext *s)
{
SDLContext *sdl = s->priv_data;
AVStream *st = s->streams[0];
@@ -165,6 +170,9 @@ static int sdl2_write_header(AVFormatContext *s)
int i, ret = 0;
int flags = 0;
+ if (sdl->inited)
+ return 0;
+
if (!sdl->window_title)
sdl->window_title = av_strdup(s->url);
@@ -249,6 +257,11 @@ static int sdl2_write_packet(AVFormatContext *s, AVPacket
*pkt)
int linesize[4];
SDL_Event event;
+
+ ret = sdl2_init(s);
+ if (ret)
+ return ret;
+
if (SDL_PollEvent(&event)){
switch (event.type) {
case SDL_KEYDOWN:
--
2.34.1
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