Say user calls

bmtool move example.mp4 ~/Foo

It creates a folder ~/Foo/example and moves example.mp4 in it

Instead of -ab 64k use -b:a 64k.

Docs

https://trac.ffmpeg.org/wiki/Encode/MP3

ffmpeg -h
-ab bitrate audio bitrate (please use -b:a)

bmtool videoSnapshot -f -o

• Create png or jpeg(default) output
• check duration of video
• take from mid. Time format is 00:00:03 for 3rd second
• check if it is video before processing

Command is

ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 1 output.jpg

or

ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 1 output.png

https://blog.depado.eu/post/checklist-for-go-projects

Video has artifacts.

See this parameter

[0:v]trim=start=0:end=15,setpts=PTS-STARTPTS[clip1]; [0:v]trim=start=0:end=15,setpts=PTS-STARTPTS[clip2]; [0:v]trim=start=15:end=15,setpts=PTS-STARTPTS[clip3]; [0:v]trim=start=15:end=15,setpts=PTS-STARTPTS[fadeoutsrc]; [0:v]trim=start=0:end=0,setpts=PTS-STARTPTS[fadeinsrc]; [fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=0:alpha=1[fadein]; [fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=0:alpha=1[fadeout]; [fadein]fifo[fadeinfifo]; [fadeout]fifo[fadeoutfifo]; [fadeoutfifo][fadeinfifo]overlay[crossfade]; [crossfade] split=3 [cf1][cf2][cf3] ; [clip2] split=3 [cl1][cl2][cl3] ; [clip1][cf1][cl1][cf2][cl2][cf3][cl3][clip3]concat=n=8:v=1[output]

Several items like clip2, clip3, fadein, fadeout are not required. They can be enclosed in if conditional.

What we need to do is to split clip1 required number of times and then concatenate it.

Better way is to create a new method that generates filter_complex. It would be cleaner.

https://github.com/spf13/cobra

• Add cobra
• Move file renamer to cobra
  • Figure out verbose flag on root. Need to know how it can be used in file rename command
  • Test bmtool file rename command after installation
• Move audio converted to cobra

https://github.com/sirupsen/logrus
https://blog.depado.eu/post/checklist-for-go-projects

I need two things

1. Create loop of video by concatenating same video -c times
2. Create loop of video by concatenating until final video duration is over -d

Count

• Create temp file
• add file 'input.mov' -c times to it
• pass temp file to ffmpeg
• format of final video is mp4
• name of output is input_3times.mp4

Duration

• get duration of video

See code here

https://github.com/talha131/bm-utilities/blob/f8bbbd2726de8dd4390b4376dd2311ccbbe1213a/bm_convert_audio/bm_convert_audio.go#L22-L27

If file is audio, then convertFile method is immediately called. If you have 1000 files, convertFile will be called 1000 times. It is not necessary, because ffmpeg has support for multiple inputs and multiple outputs.

For example, this command converts two files.

ffmpeg -i "2017-12-15 130550.mp3" -i "2018-01-19 131624.mp3" -map 0:0 -ac 1 -ab 64k -ar 44100 "2017-12-15 130550.wav" -map 1:0 -ac 1 -ab 64k -ar 44100 "2018-01-19 131624.wav"

Or

ffmpeg -i "2017-12-15 130550.mp3" -i "2018-01-19 131624.mp3" -ac 1 -ab 64k -ar 44100  -map 0:0  "2017-12-15 130550.wav" -map 1:0  "2018-01-19 131624.wav"

This converts files simultaneously.

Documentation:

1. https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs
2. https://trac.ffmpeg.org/wiki/Map

wav format does not have bitrate.

• Smallest size
• 1024x768