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‎README.md

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# FFmpeg-Encoder-Decoder-for-Python
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================================================================================
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*****
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__ _ _ _ _ ,___
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( / / / o ( / ) ) / / /
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(__/ , , _, /_ _ _ _' ( / / / ,_ _ _, / __ __/ _ _
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_/_(_/_(__/ /_(/_/ / /_/_)_ / / (__/|_)_(/_(_)_(___/(_)(_/_(/_/ (_
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// /| /|
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(/ (/ (/
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================================================================================
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Yuchen's Mpeg Coder - Readme
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This is a mpegcoder adapted from FFmpeg & Python-c-api.Using it you could
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get access to processing video easily. Just use it as a common module in
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python like this.
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>>> import mpegCoder
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Noted that this API need you to install numpy.
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An example of decoding a video in an arbitrary format:
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>>> d = mpegCoder.MpegDecoder()
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>>> d.FFmpegSetup(b'inputVideo.mp4')
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>>> p = d.ExtractGOP(10) # Get a gop of current video by setting the
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start position of 10th frame.
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>>> p = d.ExtractGOP() # Get a gop of current video, using the current
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position after the last ExtractGOP.
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>>> d.ExtractFrame(100, 100) # Extract 100 frames from the begining of
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100th frame.
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An example of transfer the coding of a video with an assigned codec:
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>>> d = mpegCoder.MpegDecoder()
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>>> d.FFmpegSetup(b'i.avi')
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>>> e = mpegCoder.MpegEncoder()
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>>> e.setParameter(decoder=d, codecName=b'libx264', videoPath=b'o.mp4')
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# inherit most of parameters from the decoder.
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>>> opened = e.FFmpegSetup() # Load the encoder.
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>>> if opened: # If encoder is not loaded successfully, do not continue.
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... p = True
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... while p:
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... p = d.ExtractGOP() # Extract current GOP.
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... for i in p: # Select every frame.
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... e.EncodeFrame(i) # Encode current frame.
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... e.FFmpegClose() # End encoding, and flush all frames in cache.
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>>> d.clear() # Close the input video.
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For more instructions, you could tap help(mpegCoder).
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================================================================================
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V1.7-linux update report:
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Thanks to God, we succeed in this work!
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A new version is avaliable for Linux. To implement this tool, you need to
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install some libraries firstly:
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- python3.5 (with numpy)
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- ffmpeg on Linux: Here are some instructions
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(1). Check every pack which ffmpeg needs on
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https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
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(2). Use these steps to install ffmpeg instead of provided commands
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on the above site.
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$ git clone https://git.ffmpeg.org/ffmpeg.git
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$ cd ffmpeg
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$ ./configure --prefix=host --enable-gpl --enable-shared --disable-static --disable-doc
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$ make
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$ make install
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V1.7 update report:
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1. Realize the encoder totally.
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2. Provide a global option 'dumpLevel' to control the log shown in the screen.
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3. Fix bugs in initalize functions.
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V1.5 update report:
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1. Provide an incomplete version of encoder, which could encode frames as a
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video stream that could not be played by player.
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V1.4 update report:
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1. Fix a severe bug of the decoder, which causes the memory collapsed if
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decoding a lot of frames.
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V1.2 update report:
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1. Use numpy array to replace the native pyList, which improves the speed
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significantlly.
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V1.0 update report:
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1. Provide the decoder which could decode videos in arbitrary formats and
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arbitrary coding.
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================================================================================
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Version of used FFmpeg library
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libavcodec.so.58.6.103
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libavformat.so.58.3.100
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libavutil.so.56.5.100
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libswresample.so.3.0.101
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libswscale.so.5.0.101
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*****
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## Yuchen's Mpeg Coder - Readme
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This is a mpegcoder adapted from FFmpeg & Python-c-api.Using it you could get access to processing video easily. Just use it as a common module in python like this.
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```python
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import mpegCoder
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```
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Noted that this API need you to install numpy.
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An example of decoding a video in an arbitrary format:
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```python
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d = mpegCoder.MpegDecoder()
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d.FFmpegSetup(b'inputVideo.mp4')
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p = d.ExtractGOP(10) # Get a gop of current video by setting the start position of 10th frame.
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p = d.ExtractGOP() # Get a gop of current video, using the current position after the last ExtractGOP.
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d.ExtractFrame(100, 100) # Extract 100 frames from the begining of 100th frame.
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```
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An example of transfer the coding of a video with an assigned codec:
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```python
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 d = mpegCoder.MpegDecoder()
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d.FFmpegSetup(b'i.avi')
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e = mpegCoder.MpegEncoder()
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e.setParameter(decoder=d, codecName=b'libx264', videoPath=b'o.mp4') # inherit most of parameters from the decoder.
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opened = e.FFmpegSetup() # Load the encoder.
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if opened: # If encoder is not loaded successfully, do not continue.
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p = True
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while p:
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p = d.ExtractGOP() # Extract current GOP.
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for i in p: # Select every frame.
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e.EncodeFrame(i) # Encode current frame.
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e.FFmpegClose() # End encoding, and flush all frames in cache.
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d.clear() # Close the input video.
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```
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For more instructions, you could tap `help(mpegCoder)`.
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## Update Report
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### V1.7-linux update report:
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Thanks to God, we succeed in this work!
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A new version is avaliable for Linux. To implement this tool, you need to install some libraries firstly:
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* python3.5
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* numpy 1.13
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If you want, you could install `ffmpeg` on Linux: Here are some instructions
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1. Check every pack which ffmpeg needs here: [Dependency of FFmpeg](https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu "Dependency of FFmpeg")
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2. Use these steps to install ffmpeg instead of provided commands on the above site.
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```Bash
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$ git clone https://git.ffmpeg.org/ffmpeg.git
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$ cd ffmpeg
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$ ./configure --prefix=host --enable-gpl --enable-shared --disable-static --disable-doc
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$ make
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$ make install
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```
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### V1.7 update report:
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1. Realize the encoder totally.
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2. Provide a global option `dumpLevel` to control the log shown in the screen.
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3. Fix bugs in initalize functions.
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### V1.5 update report:
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1. Provide an incomplete version of encoder, which could encode frames as a
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video stream that could not be played by player.
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### V1.4 update report:
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1. Fix a severe bug of the decoder, which causes the memory collapsed if
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decoding a lot of frames.
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### V1.2 update report:
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1. Use numpy array to replace the native pyList, which improves the speed
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significantlly.
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### V1.0 update report:
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1. Provide the decoder which could decode videos in arbitrary formats and
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arbitrary coding.
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## Version of currently used FFmpeg library
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* libavcodec.so.58.6.103
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* libavformat.so.58.3.100
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* libavutil.so.56.5.100
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* libswresample.so.3.0.101
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* libswscale.so.5.0.101

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