Video Processor

Purpose

Ask any content creator and they will tell you that creating videos is a time consuming process. For me, the most mundane and worse part of the process is waiting on the videos to render and waiting on the uploads to complete.

Some video editors, have a version of their software that can be ran on a server to render the video files created. By offloading the video rendering to another machine, you can edit more videos in less time.

Solution

I created this script to automate the video creation process. Videos that I post on my various content platforms have a predefined structure for each video type. Thus they are easy to automate.

I am a member of organizations, where I am partically or fully responsible for the marketing and branding of that organization. Some of the marketing is done with the use of video. This script also accomidates those additional video types.

Depending on the content that is being render, different graphics with different colors are rendered to the video.

My YouTube Channels

• Dash Cam Channel
• Home Improvement Channel
• Tech / Personal Channel

Video Schedule By Channel

• Kenny Ram Dash Cam - on Monday, Wednesdays, and Fridays
• RHT Services Home Improvement - on Saturdays
• RHT Services Tech Talk - on Tuesdays, sometimes Thursdays

Crontab Command

Command below to render videos on a schedule.

5 0-5 * * * /home/almostengr/videoprocessor/videoprocessor.sh

Command will run 5 minutes after the hour between the hours of midnight (00:05) and 05:05. This time was selected as it is the time that I would be using the computer. Thus the work I would be doing would not be slowed down by the rendering process and visa versa.

Additional FFMPEG Commands

Occasionally, there are some additional FFMPEG commands that I need to run to create the videos that I desire to have. Since the commands are rarely used, I chose to not add the functionality that uses these commands into the script, but instead note them here for future reference.

Timelapse Video Without Audio

ffmpeg -i FILE0710.MOV -filter:v "setpts=0.5*PTS" -an FILE0710.timelapse.MOV

Create Video without Audio

ffmpeg -i out165.mov -an -c:v copy uncut165.mp4

Scale Video Resolution

ffmpeg -i out165.mov -an -vf scale=1920:1080 scaled165.mov

Concat Video Timelapse Files

for file in *MP4
do
echo "file $file" >> input.txt
done

ffmpeg -f concat -i input.txt -c:v copy output.mp4

Create Video With Image Files

ffmpeg -framerate 1/3 -pattern_type glob -i '*.jpg' -c:v libx264 -r 30 -pix_fmt yuv420p output.mp4

Add Music To Video

fmpeg -i 20230401_110000.mp4 -i ../../../ytvideostructure/07music/mix03.mp3 -shortest -c:v copy -c:a copy -map 0:v:0 -map 1:a:0 output.mp4

Convert Variable Rate Video To Constant Rate Video

ffmpeg -i input.mp4 -vf "setpts=1.0*PTS" -r 30 -c:v libx264 -crf 18 -c:a aac -b:a 192k output.mp4

Normalize Audio

ffmpeg -y  -i input.mp4 -f lavfi -i anullsrc -vcodec copy -acodec aac -shortest output.mp3

Extract Audio from Video

ffmpeg -i in.mp4 -vn -ac 2 out.mp3

ffmpeg -i in.mp4 -vn -c:a copy out.m4a

Rotate Video Clip

ffmpeg -i in.mov -vf "transpose=1" out.mov

For the transpose parameter you can pass:

• 0 = 90° counterclockwise and vertical flip (default)
• 1 = 90° clockwise
• 2 = 90° counterclockwise
• 3 = 90° clockwise and vertical flip

References

• https://filme.imyfone.com/video-editing-tips/how-to-merge-or-combine-videos-using-ffmpeg/
• https://stackoverflow.com/questions/44280903/ffmpeg-vaapi-and-drawtext
• https://trac.ffmpeg.org/wiki/Hardware/VAAPI
• https://stackoverflow.com/questions/7333232/how-to-concatenate-two-mp4-files-using-ffmpeg