transcoder: fix the output size is too large

set the codec key and value through av_opt_set

Signed-off-by: Jack Lau <[email protected]>

Author: JackLau1222

src/transcoder/include/transcoder_ffmpeg.h

@@ -22,6 +22,7 @@ extern "C" {
 #include <libavcodec/avcodec.h>
 #include <libavformat/avformat.h>
 #include <libavutil/avutil.h>
+#include <libavutil/opt.h>
 };
 
 #define ENCODE_BIT_RATE 5000000

src/transcoder/src/transcoder_ffmpeg.cpp

@@ -434,6 +434,12 @@ bool TranscoderFFmpeg::prepare_Encoder_Video(StreamContext *decoder,
         return false;
     }
 
+    av_opt_set(encoder->videoCodecCtx->priv_data, "preset", "medium", 0);
+    if (encoder->videoCodecCtx->codec_id == AV_CODEC_ID_H264)
+        av_opt_set(encoder->videoCodecCtx->priv_data, "x264-params", "keyint=60:min-keyint=60:scenecut=0:force-cfr=1", 0);
+    else if (encoder->videoCodecCtx->codec_id == AV_CODEC_ID_HEVC)
+        av_opt_set(encoder->videoCodecCtx->priv_data, "x265-params", "keyint=60:min-keyint=60:scenecut=0", 0);
+        
     if (decoder->videoCodecCtx->codec_type == AVMEDIA_TYPE_VIDEO) {
         encoder->videoCodecCtx->height = decoder->videoCodecCtx->height;
         encoder->videoCodecCtx->width = decoder->videoCodecCtx->width;