@@ -20,6 +20,7 @@

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

+#include <stdlib.h>

 #include "fbdev_common.h"

 #include "libavutil/common.h"

@@ -55,3 +56,12 @@ enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varin

     return AV_PIX_FMT_NONE;

 }

+

+const char* ff_fbdev_default_device()

+{

+    const char *dev = getenv("FRAMEBUFFER");

+    if (!dev)

+        dev = "/dev/fb0";

+    return dev;

+}

+

@@ -29,4 +29,6 @@

 enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo);

+const char* ff_fbdev_default_device(void);

+

 #endif /* AVDEVICE_FBDEV_COMMON_H */

@@ -45,17 +45,23 @@ static av_cold int fbdev_write_header(AVFormatContext *h)

     FBDevContext *fbdev = h->priv_data;

     enum AVPixelFormat pix_fmt;

     int ret, flags = O_RDWR;

+    const char* device;

     if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO) {

         av_log(fbdev, AV_LOG_ERROR, "Only a single video stream is supported.\n");

         return AVERROR(EINVAL);

     }

-    if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) {

+    if (h->filename[0])

+        device = h->filename;

+    else

+        device = ff_fbdev_default_device();

+

+    if ((fbdev->fd = avpriv_open(device, flags)) == -1) {

         ret = AVERROR(errno);

         av_log(h, AV_LOG_ERROR,

                "Could not open framebuffer device '%s': %s\n",

-               h->filename, av_err2str(ret));

+               device, av_err2str(ret));

         return ret;

     }