Using FFmpeg to do some simple video process.

Tip:

zsh doesn’t support letters like ‘[‘, ‘]’ etc. so we need to add a Back Slash(\)

rake new_post\[“kicking the ffmpeg”\]

###Because

FFmpeg can’t concatenate .mp4 videos directly, but .ts is ok.

###So

We need to convert all .mp4 files to .ts, then concatenate them together.

####Convert

ffmpeg -i 1.mp4 -c:v copy -c:a copy -vbsf h264_mp4toannexb 1.ts
ffmpeg -i 2.mp4 -c:v copy -c:a copy -vbsf h264_mp4toannexb 2.ts
...

1. -c:a copy to tell FFmpeg to copy the audio stream, -c:v copy has the same mean.
2. -vbsf h264_mp4toannexb a encoder use to convert videos to .ts.
3. -i input file

####Concatenate

ffmpeg -i "concat:1.ts|2.ts|3.ts|4.ts" -c:v copy -c:a copy -absf aac_adtstoasc output.mp4

###To simplify this, we need a script as a little program.

#Not implement yet