better-ffmpeg-progress 2.5.5

Run FFmpeg & see percentage progress + ETA.

Better FFmpeg Progress

Runs an FFmpeg command and shows a progress bar with percentage progress, time elapsed and ETA.

FFmpeg outputs something like:

frame=  692 fps= 58 q=28.0 size=    5376KiB time=00:00:28.77 bitrate=1530.3kbits/s speed=2.43x

Better FFmpeg Progress outputs something like:

⠏ Processing abc.webm ━━━━━━━━━╺━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━  23% 0:00:04 00:15

Where:

• Processing abc.webm is the description of the progresss bar.
• 23% is the percentage progress.
• 0:00:04 is the time (H:MM:SS) elapsed.
• 00:15 is the estimated time until the FFmpeg process completes.

As you can see, the output of Better FFmpeg Progress is much more useful.

Installation

pip install better-ffmpeg-progress --upgrade

Usage

Create an instance of the FfmpegProcess class and supply a list of arguments like you would to subprocess.run().

Simple Example:

from better_ffmpeg_progress import FfmpegProcess
# Pass a list of FFmpeg arguments, like you would if using subprocess.run()
process = FfmpegProcess(["ffmpeg", "-i", "input.mp4", "-c:a", "libmp3lame", "output.mp3"])
# Use the run method to run the FFmpeg command.
process.run()

Advanced Example:

from better_ffmpeg_progress import FfmpegProcess

def handle_progress_info(percentage, speed, eta, estimated_filesize):
    print(f"Estimated Output Filesize: {estimated_filesize / 1_000_000} MB")

def handle_success():
  # Code to run if the FFmpeg process completes successfully.
  pass

def handle_error():
  # Code to run if the FFmpeg process encounters an error.
  pass

# Pass a list of FFmpeg arguments, like you would if using subprocess.run() or subprocess.Popen()
process = FfmpegProcess(["ffmpeg", "-i", "input.mp4", "-c:a", "libmp3lame", "output.mp3"])

# Use the run method to run the FFmpeg command.
process.run(
    progress_bar_description="Converting file...",
    progress_handler=handle_progress_info,
    log_file="ffmpeg_log.txt",
    success_handler=handle_success,
    error_handler=handle_error,
)

Optional Arguments

An instance of the FfmpegProcess class takes the following optional arguments:

• ffmpeg_loglevel: Desired FFmpeg log level. Default: "verbose"
• print_stderr_new_line: If better progress information cannot be shown, print FFmpeg stderr in a new line instead of replacing the current line in the terminal. Default: False
• print_detected_duration: Print the detected duration of the input file. Default: True

The run method takes the following optional arguments:

• progress_bar_description - An optional string to set a custom description for the progress bar. The default description is Processing <file>. This can be an empty string if you don't want the progress bar to have a description.

• progress_handler

  • You can create a function if you would like to do something with the following values:

    • Percentage progress. [float]
    • Speed, e.g. 22.3x which means that 22.3 seconds of the input are processed every second. [string]
    • ETA in seconds. [float]
    • Estimated output filesize in bytes. [float]
      • Note: This is not accurate. Please take the value with a grain of salt.

    The values will be None if unknown. The function will receive the current values of these metrics as arguments, every 0.1s.

• log_file - The filepath to save the FFmpeg log to.

• success_handler - A function to run if the FFmpeg process completes successfully.

• error_handler - A function to run if the FFmpeg process encounters an error.

Changelog

[19/09/2022]

• Add the ability to specify a success_handler argument, a function to run if the FFmpeg process completes successfully.
• Add 0.001 to tqdm's total parameter to prevent the chance of getting TqdmWarning: clamping frac to range [0, 1]

[21/12/2022]

• [v2.0.7] Fix 'estimated_size' referenced before assignment error.
• [v2.0.7] The progress bar now uses 1 decimal place for seconds processed and total duration.

[22/12/2022]

• [v2.0.8] Add the ability to specify an error_handler argument, a function to run if the FFmpeg process encounters an error.
• [v2.0.9] Fix a typo (commit da45a84)

[07/02/2022]

• [v2.1.0] Update function name to fix 'process_complete_handler' is not defined error.

[05/11/2023]

• [v2.1.2] Do not exit the Python interpreter after the FFmpeg process is complete

[22/04/2024]

• [v2.1.3] Fix issue #20

[28/04/2024]

• [v2.1.4] Fix issue #21

[02/05/2024]

• [v2.1.5] Fix issue #23 and make an error message more specific. Here is the relevant commit.

[18/10/2024]

• [v2.1.6] Notify the user if the input filepath or filename is incorrect.
• [v2.1.7] Refactor to use threads and queues.

[19/10/2024]

• [v2.1.8] Use Rich instead of tqdm and format code with Ruff.

[20/10/2024]

• [v2.1.9] Do not clear the terminal before showing the progress bar.
• [v2.2.0] Add the ability to set a custom description for the progress bar.

[22/10/2024]

• [v2.2.1] Only create a log file if the log_file parameter is specified and always create a log file if the FFmpeg process fails.

[28/10/2024]

• [v2.2.2] Make printing the detected duration of the input file optional.

[29/10/2024]

• [v2.3.0] Set shell=True to support piping.
• [v2.3.1] Kill FFmpeg process(es) on KeyboardInterrupt

[31/10/2024]

• [v2.4.0] Print FFmpeg stderr if better progress information cannot be shown.
• [v2.4.0] Flush the stream when printing FFmpeg stderr to ensure that it is printed immediately.
• [v2.5.0] Add an option to print FFmpeg stderr on a new line if better progress information cannot be shown.

[11/11/2024]

• [v2.5.1] Print the correct log file.

[12/11/2024]

• [v2.5.2] Drain any remaining FFmpeg stderr after the process ends.
• [v2.5.3] Write FFmpeg stderr to the log file in real time.
• [v2.5.4] Include progress info in stderr if the duration of the input file cannot be detected.
• [v2.5.5] Print detected errors in the terminal and only set shell=True if shell operators are detected.