H.264 video codec support using OpenH264/FFmpeg

talk/media/webrtc/webrtcvideoengine2.cc

 /*
  * libjingle
  * Copyright 2014 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 396 matching lines @@
   bool denoising;
   bool codec_default_denoising = false;
   if (is_screencast) {
     denoising = false;
   } else {
     // Use codec default if video_noise_reduction is unset.
     codec_default_denoising = !options.video_noise_reduction;
     denoising = options.video_noise_reduction.value_or(false);
   }
 
+  if (CodecNamesEq(codec.name, kH264CodecName)) {
+    encoder_settings_.h264 = webrtc::VideoEncoder::GetDefaultH264Settings();
+    encoder_settings_.h264.frameDroppingOn = frame_dropping;
+    return &encoder_settings_.h264;
+  }
   if (CodecNamesEq(codec.name, kVp8CodecName)) {
     encoder_settings_.vp8 = webrtc::VideoEncoder::GetDefaultVp8Settings();
     encoder_settings_.vp8.automaticResizeOn = automatic_resize;
     // VP8 denoising is enabled by default.
     encoder_settings_.vp8.denoisingOn =
         codec_default_denoising ? true : denoising;
     encoder_settings_.vp8.frameDroppingOn = frame_dropping;
     return &encoder_settings_.vp8;
   }
   if (CodecNamesEq(codec.name, kVp9CodecName)) {
@@ skipping 2199 matching lines @@
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VIDEO