FFmpeg frame counter + resolution/bitrate/FPS box

Question

I was trying to use drawtext FFmpeg filter to insert a frame counter at the bottom of my video by using this command:

ffmpeg -i input.mp4 -vf "drawtext=fontfile=C\\:/Windows/fonts/consola.ttf: text='Frame\\: %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2\*lh): fontcolor=black: fontsize=50: box=1: boxcolor=white: boxborderw=5" -c:a copy output.mp4

So far all works fine. I was wondering how could I insert also a resolution/bitrate box at the top of the video as shown in the image below:

Answer 1

There is no builtin option for drawing resolution bitrate and frame rate, so we have to define an environment variable, and pass it to FFmpeg.

Formatting a string in Windows shell, is messy and the following "single line" example is far from perfect:

for /f "tokens=1" %i in ('ffprobe "-v" "error" "-select_streams" "v:0" "-show_entries" "stream=width,height" "-of" "csv=s=x:p=0" "input.mp4"') do set "resolution=%i" && for /f "tokens=1" %i in ('ffprobe "-v" "error" "-select_streams" "v:0" "-show_entries" "stream=bit_rate" "-of" "csv=p=0" "input.mp4"') do set "bitrate=%i" && for /f "tokens=1" %i in ('ffprobe "-v" "error" "-select_streams" "v:0" "-show_entries" "stream=r_frame_rate" "-of" "csv=p=0" "input.mp4"') do set "framerate=%i" && set str='%resolution% / %bitrate% bps / %framerate% fps' && ffmpeg -y -i input.mp4 -vf "drawtext=fontfile=C\\:/Windows/fonts/consola.ttf:text='%str%':x=(w-tw)/2:y=h-(2\*lh):fontcolor=black:fontsize=50:box=1: boxcolor=white:boxborderw=5" -c:a copy output.mp4

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• Use FFprobe, for getting the resolution, bitrate and frame rate (I didn't try to convert the bitrate from bps to kbps).
  Adding -pretty argument format the rate to 1.672451 Mbit/s.
• Assign the output of FFmpeg to variables as described here (all the solutions are not very elegant).
• set str='%resolution% / %bitrate% bps / %framerate% fps' - formats the final string to the environment variable str.
• text='%str%' draws the content of variable str.
• && is used for concatenating the 4 commands into single line.
  Note: FFprobe is executed 3 times, because it looks like there is no option to add custom text between elements (we better look for more elegant solution).

Removing the / from the 60/1 is possible using shell string manipulation as described here: set frate=%framerate:~0,-2%.

Use drawtext filter twice (separated by comma) for drawing two text boxes.

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Output example:

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Note:
The solution would be much more elegant using scripting language like Python, instead of Windows console.