ffmpeg編解碼、攝像頭直播、推流、混屏

ffmpeg轉碼

ffmpeg -y -i /opt/video/a.mpg -s 1280x720 -vcodec h264 -strict -2 /opt/video/b.mp4

本地攝像頭直播

ffmpeg -f dshow -i video="Integrated Camera" -an -s 640x360 -vcodec libx264 -b:v 1000k -ab 128k -f flv rtmp://10.168.103.151:1935/live/a

rtmp直播

ffmpeg -i /root/video/b.mp4 -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://10.168.103.151:1935/live/a

flv直播

ffmpeg -i /root/video/b.mp4 -c copy -f flv -s 1280x720 -q 10 rtmp://10.168.103.151:1935/live/a

hls直播

ffmpeg -i /root/video/b.mp4 -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://10.168.103.151:1935/hls/aa

混屏直播格式

ffmpeg -i out1.mp4 -i out2.mp4 -i out3.mp4 -i out4.mp4 -filter_complex "[0:v]pad=iw*2:ih*2[a];[a][1:v]overlay=w[b];[b][2:v]overlay=0:h[c];[c][3:v]overlay=w:h" out.mp4

視頻流混屏直播2x2，指定分辨率

ffmpeg -i rtmp://10.168.103.151:1935/live/b -i rtmp://10.168.103.151:1935/live/c  -i rtmp://10.168.103.151:1935/live/b  -i rtmp://10.168.103.151:1935/live/c -filter_complex "[0:v]scale=480*200[aa];[1:v]scale=480*200[bb];[2:v]scale=480*200[cc];[3:v]scale=480*200[dd];[aa]pad=480*2:200*2[a];[a][bb]overlay=480[b];[b][cc]overlay=0:200[c];[c][dd]overlay=480:200" -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv  -q 10 rtmp://10.168.103.151:1935/live/bb