FFmpeg Constant UDP Output

By default ffmpeg writes to the socket as soon as new data is available.  This leads to traffic bursts which may cause the receiver buffer to overflow or underflow. Example for a 720p @ 2500 kbps CBR MPEG-2 transport stream: ffmpeg -re -i <input> -s 1280x720 -r 24 -c:v libx264 -x264opts nal-hrd=cbr:force-cfr=1 \ -b:v 2300k -minrate 2300k … Continue reading FFmpeg Constant UDP Output


FFmpeg H.264 Constant Bitrate (CBR) Encoding

Example command using a single-frame VBV: ffmpeg -i <input> -r 25 -c:v libx264 -x264opts nal-hrd=cbr:force-cfr=1 -b:v 2500k -minrate 2500k -maxrate 2500k -bufsize 100k output.ts where: nal-hrd=cbr set the hypothetical reference decoder (HRD) to CBR and pack the bitstream to the specified bitrate force-cfr=1 force constant framerate timestamp generation -b:v the video bitrate -minrate -maxrate same … Continue reading FFmpeg H.264 Constant Bitrate (CBR) Encoding