parsed-ffmpeg 0.3.0

Run ffmpeg and ffprobe commands with nicely parsed output.

FFmpeg output parser

Overview

Do you already know the ffmpeg command line, and don't want to relearn some syntax of a pythonic ffmpeg wrapper? This is the package for you. Just put in an ffmpeg or ffprobe command and this package structures the output while it's processing.

Usage

The code below converts a video, and prints the percentage completion while it's working. This example includes optional error handling, output shown below.

from parsed_ffmpeg import run_ffmpeg, FfmpegError


async def process_video():
    try:
        await run_ffmpeg(
            f"ffmpeg -i input.mp4 -c:v libx264 output.mp4",
            on_status=lambda status: print(f"We're: {status.completion * 100:.1f}% there!"),
            overwrite_output=True
        )
        print("Done!")
    except FfmpegError as e:
        print(f"ffmpeg failed with error: {e}")

Example output: custom status logging

We're: 8.2% there!
We're: 45.5% there!
We're: 100.0% there!
Done!

Error example

ffmpeg failed with error: 

	User command:
		ffmpeg -i input.mp4 -c:v libx264 output.mp4
	Full command:
		ffmpeg -i input.mp4 -c:v libx264 output.mp4 -y -progress pipe:1
	Working directory:
		C:\Users\rutenl\PycharmProjects\parsed_ffmpeg

[in#0 @ 00000208d2d4e1c0] Error opening input: No such file or directory
Error opening input file input.mp4.
Error opening input files: No such file or directory

Example: Ffprobe

Ffprobe output is also supported, use it like this:

input_video = "input.mp4"
result = await run_ffprobe(f"ffprobe {input_video}")
print(str(result))

The ffprobe result includes this info:

{
  "bitrate_kbs": 3293,
  "duration_ms": 6840,
  "start_time": 0.0,
  "streams": [
    {
      "bitrate_kbs": 3152,
      "codec": "h264",
      "details": "yuv420p(tv, smpte170m, progressive), 1280x720 [SAR 1:1 DAR 16:9], 3152 kb/s, 60 fps, 60 tbr, 15360 tbn (default)",
      "type": "video",
      "resolution_w": 1280,
      "resolution_h": 720,
      "fps": 60
    },
    {
      "bitrate_kbs": 128,
      "codec": "aac",
      "details": "48000 Hz, stereo, fltp, 128 kb/s (default)",
      "type": "audio",
      "sample_rate": 48000,
      "channels": ["stereo", "fltp"]
    }
  ]
}

Example: run with tqdm to get a progressbar

If you install the tqdm extra dependency (pip install parsed-ffmpeg[tqdm]), you can do the following:

input_video = Path(__file__).parent.parent / "tests/assets/input.mp4"
await run_ffmpeg(
    f"ffmpeg -i {input_video} -vf scale=-1:1440 -c:v libx264 output.mp4",
    print_progress_bar=True,
    progress_bar_description=input_video.name,
    overwrite_output=True,
)

It'll give output like this:

input.mp4:  73%|███████▎  | 4466/6084 [00:04<00:00, 1620.10ms/s]

Installation

Remember that this package does not come with an ffmpeg binary, you have to have it in path or point to it in your command.

pip install parsed-ffmpeg

API

run_ffmpeg

async def run_ffmpeg(
    command: list[str] | str,
    on_status: Callable[[FfmpegStatus], None] | None = None,
    on_stdout: Callable[[str], None] | None = None,
    on_stderr: Callable[[str], None] | None = None,
    on_error: Callable[[list[str]], None] | None = None,
    on_warning: Callable[[str], None] | None = None,
    overwrite_output: bool = False,
    raise_on_error: bool = True,
    print_progress_bar: bool = False,
    progress_bar_description: str | None = None,
) -> None:
    ...

StatusUpdate

class StatusUpdate:
    frame: int | None
    fps: float | None
    bitrate: str | None
    total_size: int | None
    out_time_ms: float | None
    dup_frames: int | None
    drop_frames: int | None
    speed: float | None
    progress: str | None
    duration_ms: int | None
    completion: float | None

run_ffprobe

async def run_ffprobe(
    command: list[str | Path] | str,
    on_error: Callable[[list[str]], None] | None = None,
    on_warning: Callable[[str], None] | None = None,
    raise_on_error: bool = True,
) -> FfprobeResult:
    ...

ffprobe types

class AudioStream(BaseStream):
    bitrate_kbs: int
    codec: str
    details: str
    type: StreamType #(video or audio)
    sample_rate: int
    channels: list[str]

class VideoStream(BaseStream):
    bitrate_kbs: int
    codec: str
    details: str
    type: StreamType #(video or audio)
    resolution_w: int
    resolution_h: int
    fps: int

class FfprobeResult:
    bitrate_kbs: int
    duration_ms: int
    start_time: float
    streams: list[BaseStream]

Changing ffmpeg install location

Just replace the first part of your command (ffmpeg) with the path to ffmpeg. Example:

await run_ffmpeg("C:/apps/ffmpeg.exe -i input.mp4 -c:v libx264 output.mp4 -y")

License

MIT