Allows arrangement of multiple windows such as:
ffmpeg -re -f lavfi -i mandelbrot -f sdl -window_x 1 -window_y 1 mandelbrot -vf
waveform,format=yuv420p -f sdl -window_x 641 -window_y 1 waveform -vf
vectorscope,format=yuv420p -f sdl -window_x 1 -window_y 481 vectorscop
From 00438983c96b5db227b9975a2c160fc6aac5219d Mon Sep 17 00:00:00 2001
From: Dave Rice <d...@dericed.com>
Date: Mon, 1 Oct 2018 17:08:35 -0400
Subject: [PATCH 2/2] avdevice/sdl2 : add option to set window position
---
libavdevice/sdl2.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/libavdevice/sdl2.c b/libavdevice/sdl2.c
index da5143078e..69c541da23 100644
--- a/libavdevice/sdl2.c
+++ b/libavdevice/sdl2.c
@@ -40,6 +40,7 @@ typedef struct {
SDL_Renderer *renderer;
char *window_title;
int window_width, window_height; /**< size of the window */
+ int window_x, window_y; /**< position of the window */
int window_fullscreen;
int window_borderless;
int enable_quit_action;
@@ -217,6 +218,12 @@ static int sdl2_write_header(AVFormatContext *s)
SDL_SetWindowTitle(sdl->window, sdl->window_title);
+ if (!sdl->window_x)
+ sdl->window_x = SDL_WINDOWPOS_CENTERED;
+ if (!sdl->window_y)
+ sdl->window_y = SDL_WINDOWPOS_CENTERED;
+ SDL_SetWindowPosition(sdl->window, sdl->window_x, sdl->window_y);
+
sdl->texture = SDL_CreateTexture(sdl->renderer, sdl->texture_fmt,
SDL_TEXTUREACCESS_STREAMING,
codecpar->width, codecpar->height);
@@ -337,6 +344,8 @@ static int sdl2_write_packet(AVFormatContext *s, AVPacket
*pkt)
static const AVOption options[] = {
{ "window_title", "set SDL window title", OFFSET(window_title),
AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
{ "window_size", "set SDL window forced size", OFFSET(window_width),
AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
+ { "window_x", "set SDL window x position", OFFSET(window_x),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM
},
+ { "window_y", "set SDL window y position", OFFSET(window_y),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM
},
{ "window_fullscreen", "set SDL window fullscreen",
OFFSET(window_fullscreen), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1,
AV_OPT_FLAG_ENCODING_PARAM },
{ "window_borderless", "set SDL window border off",
OFFSET(window_borderless), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1,
AV_OPT_FLAG_ENCODING_PARAM },
{ "window_enable_quit", "set if quit action is available",
OFFSET(enable_quit_action), AV_OPT_TYPE_INT, {.i64=1}, 0, 1,
AV_OPT_FLAG_ENCODING_PARAM },
--
2.19.0
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