FFmpeg support¶

FFmpeg A complete, cross-platform solution to record, convert and stream audio and video.

Install FFmpeg¶

Download FFmpeg from here
./configure --disable-all --disable-autodetect --disable-podpages --disable-asm --enable-avcodec --enable-avformat --enable-decoders --enable-encoders --enable-demuxers --enable-parsers --enable-protocol='file' --enable-swscale --enable-zlib
make
sudo make install

Add FFmpeg to your project¶

Add library: FFmpeg (for GCC: -lavformat -lavcodec -lavutil -lswscale -lm -lz -lpthread)

Usage¶

Enable LV_USE_FFMPEG in lv_conf.h.

See the examples below.

Note that, the FFmpeg extension doesn't use LVGL's file system. You can simply pass the path to the image or video as usual on your operating system or platform.

Example¶

Decode image¶

#include "../../lv_examples.h"
#if LV_BUILD_EXAMPLES
#if LV_USE_FFMPEG


/**
 * Open an image from a file
 */
void lv_example_ffmpeg_1(void)
{
    lv_obj_t * img = lv_img_create(lv_scr_act());
    lv_img_set_src(img, "./lvgl/examples/libs/ffmpeg/ffmpeg.png");
    lv_obj_center(img);
}

#else

void lv_example_ffmpeg_1(void)
{
    /*TODO
     *fallback for online examples*/

    lv_obj_t * label = lv_label_create(lv_scr_act());
    lv_label_set_text(label, "FFmpeg is not installed");
    lv_obj_center(label);
}

#endif
#endif

Error encountered while trying to open /home/runner/work/100ask_lvgl_docs/100ask_lvgl_docs/examples/libs/ffmpeg/lv_example_ffmpeg_1.py

Decode video¶

#include "../../lv_examples.h"
#if LV_BUILD_EXAMPLES
#if LV_USE_FFMPEG

/**
 * Open a video from a file
 */
void lv_example_ffmpeg_2(void)
{
    /*birds.mp4 is downloaded from http://www.videezy.com (Free Stock Footage by Videezy!)
     *https://www.videezy.com/abstract/44864-silhouettes-of-birds-over-the-sunset*/
    lv_obj_t * player = lv_ffmpeg_player_create(lv_scr_act());
    lv_ffmpeg_player_set_src(player, "./lvgl/examples/libs/ffmpeg/birds.mp4");
    lv_ffmpeg_player_set_auto_restart(player, true);
    lv_ffmpeg_player_set_cmd(player, LV_FFMPEG_PLAYER_CMD_START);
    lv_obj_center(player);
}

#else

void lv_example_ffmpeg_2(void)
{
    /*TODO
     *fallback for online examples*/

    lv_obj_t * label = lv_label_create(lv_scr_act());
    lv_label_set_text(label, "FFmpeg is not installed");
    lv_obj_center(label);
}

#endif
#endif

Error encountered while trying to open /home/runner/work/100ask_lvgl_docs/100ask_lvgl_docs/examples/libs/ffmpeg/lv_example_ffmpeg_2.py

API¶

Enums

enum lv_ffmpeg_player_cmd_t¶

Values:

enumerator LV_FFMPEG_PLAYER_CMD_START¶

enumerator LV_FFMPEG_PLAYER_CMD_STOP¶

enumerator LV_FFMPEG_PLAYER_CMD_PAUSE¶

enumerator LV_FFMPEG_PLAYER_CMD_RESUME¶

enumerator _LV_FFMPEG_PLAYER_CMD_LAST¶

Functions

void lv_ffmpeg_init(void)¶: Register FFMPEG image decoder

int lv_ffmpeg_get_frame_num(const char *path)¶

Get the number of frames contained in the file

参数: path -- image or video file name
返回: Number of frames, less than 0 means failed

lv_obj_t *lv_ffmpeg_player_create(lv_obj_t *parent)¶

Create ffmpeg_player object

参数: parent -- pointer to an object, it will be the parent of the new player
返回: pointer to the created ffmpeg_player

lv_res_t lv_ffmpeg_player_set_src(lv_obj_t *obj, const char *path)¶

Set the path of the file to be played

参数

obj -- pointer to a ffmpeg_player object
path -- video file path

返回

LV_RES_OK: no error; LV_RES_INV: can't get the info.

void lv_ffmpeg_player_set_cmd(lv_obj_t *obj, lv_ffmpeg_player_cmd_t cmd)¶

Set command control video player

参数

obj -- pointer to a ffmpeg_player object
cmd -- control commands

void lv_ffmpeg_player_set_auto_restart(lv_obj_t *obj, bool en)¶

Set the video to automatically replay

参数

obj -- pointer to a ffmpeg_player object
en -- true: enable the auto restart

Variables

const lv_obj_class_t lv_ffmpeg_player_class¶

struct lv_ffmpeg_player_t¶

Public Members

lv_img_t img¶

lv_timer_t *timer¶

lv_img_dsc_t imgdsc¶

bool auto_restart¶

struct ffmpeg_context_s *ffmpeg_ctx¶