updated badges and fixed deprecation warnings (#36)

* updated badges and fixed deprecation warnings

* only use AV_FRAME_FLAG_KEY when available

Author: berndpfrommer

README.md

@@ -22,8 +22,8 @@ To extract e.g. frames or an mp4 file from a recorded bag, have a look at the
 Continuous integration is tested under Ubuntu with the following ROS2 distros:
 
  [![Build Status](https://build.ros2.org/buildStatus/icon?job=Hdev__ffmpeg_image_transport__ubuntu_jammy_amd64&subject=Humble)](https://build.ros2.org/job/Hdev__ffmpeg_image_transport__ubuntu_jammy_amd64/)
- [![Build Status](https://build.ros2.org/buildStatus/icon?job=Idev__ffmpeg_image_transport__ubuntu_jammy_amd64&subject=Iron)](https://build.ros2.org/job/Idev__ffmpeg_image_transport__ubuntu_jammy_amd64/)
- [![Build Status](https://build.ros2.org/buildStatus/icon?job=Rdev__ffmpeg_image_transport__ubuntu_jammy_amd64&subject=Rolling)](https://build.ros2.org/job/Rdev__ffmpeg_image_transport__ubuntu_jammy_amd64/)
+ [![Build Status](https://build.ros2.org/buildStatus/icon?job=Jdev__ffmpeg_image_transport__ubuntu_noble_amd6464&subject=Jazzy)](https://build.ros2.org/job/Jdev__ffmpeg_image_transport__ubuntu_noble_amd64/)
+ [![Build Status](https://build.ros2.org/buildStatus/icon?job=Rdev__ffmpeg_image_transport__ubuntu_noble_amd64&subject=Rolling)](https://build.ros2.org/job/Rdev__ffmpeg_image_transport__ubuntu_noble_amd64/)
 
 
 ## Installation

src/ffmpeg_decoder.cpp

@@ -259,7 +259,13 @@ bool FFMPEGDecoder::decodePacket(const FFMPEGPacketConstPtr & msg)
       image->header = msg->header;
       image->header.stamp = it->second;
       ptsToStamp_.erase(it);
-      callback_(image, decodedFrame_->key_frame == 1);  // deliver callback
+      // deliver callback
+#ifdef AV_FRAME_FLAG_KEY
+      const bool isKeyFrame = (decodedFrame_->flags & AV_FRAME_FLAG_KEY) != 0;
+#else
+      const bool isKeyFrame = decodedFrame_->key_frame == 1;
+#endif
+      callback_(image, isKeyFrame);
     }
   }
   av_packet_unref(packet);