Automatic subtitle generation (PocketSphinx)

• Download swig - apt-get install swig for ease
• Download Sphinxbase (currently v.5, check sourceforge GitHub for latest)
  • mv sphinxbase-XXXX sphinxbase; cd sphinxbase
  • ./configure
  • make
• Now its dependency is satisfied, add PocketSphinx via GitHub

  • run ./autogen.sh

  • ./configure

  • make clean all

      ../../src/libpocketsphinx/.libs/libpocketsphinx.so: undefined reference to `cmd_ln_print_values_r'
    

  • make check

  • sudo make install

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Accurate subtitles (provided in text file) to .srt

• Install maven2 and then build sphinx4
• Make a test video clip, transcribe it manually, convert video to proper format:

ffmpeg -i Short_clip.mp4 -acodec pcm_s16le -ac 1 -ar 16000 Short_clip.wav

• Use long audio alignment being developed in Sphinx

java -cp sphinx4-samples/target/sphinx4-samples-1.0-SNAPSHOT-jar-with-dependencies.jar sphinx4-core/src/main/java/edu/cmu/sphinx/alignment/LongTextAligner.java Short_clip.wav file.txt en-us-generic cmudict-5prealpha.dict cmudict-5prealpha.fst.ser