ffms 0.4

Example usage

If you don’t need to keep the index, create a video source right away:

>>> import ffms
>>> source_file = "test/CINT_Nik_H264_720_512kb.mp4"
>>> vsource = ffms.VideoSource(source_file)

Or you can create an indexer:

>>> indexer = ffms.Indexer(source_file)
>>> indexer.format_name
'mov,mp4,m4a,3gp,3g2,mj2'
>>> indexer.track_info_list
[TrackInfo(type=0, codec_name='h264'), TrackInfo(type=1, codec_name='aac')]

Then create the index for the video source:

>>> index = indexer.do_indexing(-1)
>>> track_number = index.get_first_indexed_track_of_type(ffms.FFMS_TYPE_VIDEO)
>>> vsource = ffms.VideoSource(source_file, track_number, index)

Extract information from the video source:

>>> vsource.properties.NumFrames
1430
>>> vsource.track.keyframes[:5]
[0, 12, 24, 36, 48]
>>> vsource.track.timecodes[:5]
[0.0, 41.666666666666664, 83.33333333333333, 125.0, 166.66666666666666]

Retrieve a video frame:

>>> frame = vsource.get_frame(0)
>>> frame.EncodedWidth, frame.EncodedHeight
(416, 240)
>>> frame.planes[0]
array([41, 41, 41, ...,  0,  0,  0], dtype=uint8)

Audio stuff:

>>> track_number = index.get_first_indexed_track_of_type(ffms.FFMS_TYPE_AUDIO)
>>> asource = ffms.AudioSource(source_file, track_number, index)
>>> aprops = asource.properties
>>> aprops.SampleRate, aprops.BitsPerSample, aprops.Channels
(48000, 32, 2)
>>> min_audio, max_audio = float("inf"), float("-inf")
>>> for audio in asource.linear_access(rate=100):
...     if audio.min() < min_audio:
...         min_audio = audio.min()
...     if audio.max() > max_audio:
...         max_audio = audio.max()
>>> min_audio, max_audio
(-0.4941235, 0.57445675)

ffmsinfo.py is a demo script showing how this package can be used.

Installation

Install from PyPI:

$ pip install ffms

Or install the latest version from source:

$ pip install git+https://github.com/hiddenspirit/ffms

You also need the FFmpegSource shared library (libffms2) installed and reachable by the dynamic loader. On Debian/Ubuntu:

$ sudo apt install libffms2-5

On Windows, place ffms2.dll (or ffms2-x64.dll) next to your script or in a directory on the library search path.

Prerequisites

• Python 3.8+

• FFmpegSource (the libffms2 shared library)

• numpy

• pywin32 (Windows only)

The API was designed to be an object-oriented and Pythonic version of the original FFmpegSource API.