如何从实时 rtsp 流生成多比特率的 HLS 内容？

Question

我正在从实时 rtsp 流中生成单比特率实时 hls 内容。我正在使用以下命令

ffmpeg -v verbose -i rtsp://127.0.0.1:8080/test.sdp \
 -vcodec libx264 -acodec aac -ac 1 -strict -2 -crf 18 -profile:v baseline \
 -maxrate 400k -bufsize 1835k -pix_fmt yuv420p -flags -global_header \
 -hls_time 10 -hls_list_size 3 -hls_wrap 4 -hls_flags delete_segments \
 -start_number 1 /usr/local/apache-tomcat-7.0.53/webapps/ROOT/hls/index1.m3u8

如何修改上述 ffmpg 命令以生成多个比特率输出内容？请帮我。

Answer 1

ffmpeg -v verbose -i rtsp://127.0.0.1:8080/test.sdp \
-vcodec libx264 -acodec aac -ac 1 -strict -2 -crf 18 \
-profile:v baseline -maxrate 400k -bufsize 1835k \
-pix_fmt yuv420p -flags -global_header \
-hls_time 10 -hls_list_size 3 -hls_wrap 4 -hls_flags delete_segments \
-start_number 1 /usr/local/apache-tomcat-7.0.53/webapps/ROOT/hls/index1.m3u8 \
-vcodec libx264 -acodec aac -ac 1 -strict -2 -crf 18 \
-profile:v baseline -maxrate 700k -bufsize 1835k \
-pix_fmt yuv420p -flags -global_header \
-hls_time 10 -hls_list_size 3 -hls_wrap 4 -hls_flags delete_segments \
-start_number 1 /usr/local/apache-tomcat-7.0.53/webapps/ROOT/hls/index2.m3u8

并创建 index.m3u8 指向上面的流：

#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=400000
hls/index1.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=700000
hls/index2.m3u8