Ever needed to convert a video clip (MKV, MP4, etc) to a transport stream file? Here's how:

ffmpeg -i INPUT.mkv -c:v libx264 -c:a aac -ar 48k -b:a 192k -pix_fmt yuv420p -streamid 0:100 -streamid 1:101 -mpegts_flags latm OUTPUT.ts

You will need to modify the command above to meet your needs - the PIDs to use along with codecs, bitrates etc. Below explains what each flag is for:

• -c:v libx264 specifies the video codec as x264
• -c:a aac specifies the audio codec as AAC
• -ar 48k sets the audio samle rate
• -b:a 192k sets the audio bitrate
• -pix_fmt yuv420p sets the pixel format
• -streamid 0:100 tells ffmpeg to set the PID of the first stream (video/image in this case, because it was specified first) to 100
• -streamid 1:101 tells ffmpeg to set the PID fo the second stream (audio) to 101
• -mpegtf_flags latm tells ffmpeg to use LATM packetisation for AAC streams