process-captions

4 files changed, 254 insertions, 22 deletions

diff --git a/roles/caption/tasks/main.yml b/roles/caption/tasks/main.yml
index 7bf45d0..6396339 100644
--- a/roles/caption/tasks/main.yml
+++ b/roles/caption/tasks/main.yml
@@ -3,12 +3,31 @@
     name:
       - python3-pip
       - ffmpeg
+      - cmake
+      - jq
 - name: Install whisper
   ansible.builtin.pip:
     name: git+https://github.com/openai/whisper.git
+- name: Install lhotse
+  ansible.builtin.pip:
+    name:
+      - lhotse
+      - webvtt-py
+      - tqdm
+      - torchaudio
+      - num2words
 - name: Copy the shell script
-  tags: caption-sh
+  tags: process-captions
   template:
-    src: caption.sh
-    dest: current
+    src: process-captions.py
+    dest: /data/emacsconf/{{ emacsconf_year }}/process-captions.py
     mode: 0755
+    owner: sachac
+    group: org
+- name: Copy talks.json
+  tags: talks-json
+  template:
+    src: talks.json
+    dest: /data/emacsconf/{{ emacsconf_year }}/talks.json
+    owner: sachac
+    group: org
diff --git a/roles/caption/templates/caption.sh b/roles/caption/templates/caption.sh
deleted file mode 100755
index 9600a3c..0000000
--- a/roles/caption/templates/caption.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-# {{ ansible_managed }}
-FILE="$1"
-MODEL="${2:small}"
-AUDIO=$(basename "$FILE" | sed s/\\.[a-z][a-z][a-z][a-z]?$//).ogg
-if [[ ! -f $AUDIO ]]; then
-  if  [[ "$FILE" == *webm ]]; then
-      ffmpeg -y -i "$FILE" -acodec copy -vn $AUDIO
-  else
-      ffmpeg -y -i "$FILE" -acodec libvorbis -vn $AUDIO
-  fi
-fi
-date > $AUDIO-$MODEL.log
-time whisper $AUDIO --model $MODEL --threads 12 >> $AUDIO-$MODEL.log
-for EXT in vtt txt srt; do
-    mv $AUDIO.$EXT $(basename -s .webm.$EXT $AUDIO.$EXT)
-done
-date >> $AUDIO-$MODEL.log
diff --git a/roles/caption/templates/process-captions.py b/roles/caption/templates/process-captions.py
new file mode 100755
index 0000000..6ad890a
--- /dev/null
+++ b/roles/caption/templates/process-captions.py
@@ -0,0 +1,231 @@
+#!/usr/bin/python3
+"""Use OpenAI Whisper to automatically generate captions for the video files in the specified directory."""
+
+# {{ ansible_managed }}
+
+# The MIT License (MIT)
+# Copyright © 2022 Sacha Chua <sacha@sachachua.com>
+
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation files
+# (the “Software”), to deal in the Software without restriction,
+# including without limitation the rights to use, copy, modify, merge,
+# publish, distribute, sublicense, and/or sell copies of the Software,
+# and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from collections import defaultdict
+import subprocess
+import datetime
+import sys
+import webvtt
+import xml.etree.ElementTree as ET
+from lhotse import RecordingSet, Recording, AudioSource, SupervisionSegment, SupervisionSet, create_cut_set_eager, align_with_torchaudio, CutSet, annotate_with_whisper
+from tqdm import tqdm
+import whisper
+import re
+import os
+import json
+import torch
+
+THREADS = 12
+VIDEO_REGEXP = '\.(webm|mov)$'
+AUDIO_REGEXP = '\.(ogg|opus)$'
+ALWAYS = False
+TRIM_AUDIO = False
+MODEL = os.environ.get('MODEL', 'large')  # Set to tiny for testing
+JSON_FILE = '/data/emacsconf/2022/talks.json'
+
+def get_slug_from_filename(filename):
+    m = re.search('emacsconf-[0-9]+-([a-z]+)--', filename)
+    if m:
+        return m.group(1)
+    else:
+        return os.path.basename(os.path.dirname(filename))
+        
+def get_files_to_work_on(directory):
+    """Return the list of audio files to work on.
+    The specified directory is checked recursively.
+    Skip any videos that already have caption files.
+    
+    Convert any videos that don't already have audio files, and return the audio files instead.
+    When there are multiple videos and audio files for a talk, pick one.
+    """
+    info = defaultdict(lambda: {}, {})
+    directory = os.path.expanduser(directory)
+    for folder, subs, files in os.walk(directory):
+        for filename in files:
+            f = os.path.join(folder, filename)
+            slug = get_slug_from_filename(f)
+            info[slug]['slug'] = slug
+            if re.search(AUDIO_REGEXP, filename):
+                info[slug]['audio'] = f
+            elif re.search(VIDEO_REGEXP, filename): 
+                info[slug]['video'] = f
+            elif re.search('vtt$', filename): 
+                info[slug]['vtt'] = f
+            elif re.search('srv2$', filename): 
+                info[slug]['srv2'] = f
+    needs_work = []
+    if JSON_FILE:
+        with open(JSON_FILE) as f:
+            talks = json.load(f)['talks']
+    for key, val in info.items():
+        if not 'video' in val and not 'audio' in val: continue
+        if talks:
+            talk = next(filter(lambda talk: talk['slug'] == val['slug'], talks), None)
+        if talk:
+            val['base'] = os.path.join(os.path.dirname(val['video'] or val['audio']),
+                                       base_name(talk['video-slug']))
+        else:
+            val['base'] = os.path.join(os.path.dirname(val['video'] or val['audio']),
+                                       base_name(val['video'] or val['audio']))
+        if ALWAYS or (not 'vtt' in val or not 'srv2' in val):
+            if not 'audio' in val and 'video' in val:
+                # No audio, need to convert it
+                val = extract_audio(val)
+            needs_work.append(val)
+    return needs_work
+
+def extract_audio(work):
+    output = subprocess.check_output(['ffprobe', video_file], stderr=subprocess.STDOUT)
+    extension = 'opus'
+    if 'Audio: vorbis' in output.decode():
+        extension = 'ogg'
+    new_file = os.path.join(os.path.dirname(video_file), base_name(video_file) + '.' + extension)
+    acodec = 'copy' if re.search('webm$', video_file) else 'libopus'
+    log("Extracting audio from %s acodec %s" % (video_file, acodec))
+    output = subprocess.check_output(['ffmpeg', '-y', '-i', video_file, '-acodec', acodec, '-vn', new_file], stderr=subprocess.STDOUT)
+    work['audio'] = new_file
+    return work
+
+def to_sec(time_str):
+    "Convert a WebVTT time into seconds."
+    h, m, s, ms = re.split('[\\.:]', time_str)
+    return int(h) * 3600 + int(m) * 60 + int(s) + (int(ms) / 1000)
+
+def log(s):
+    print(datetime.datetime.now(), s)
+
+def clean_up_timestamps(result):
+    segs = list(result['segments'])
+    seg_len = len(segs)
+    for i, seg in enumerate(segs[:-1]):
+        seg['end'] = min(segs[i + 1]['start'] - 0.001, seg['end'])
+    result['segments'] = segs
+    return result
+    
+def generate_captions(work):
+    """Generate a VTT file based on the audio file."""
+    log("Generating captions")
+    new_file = work['base'] + '.vtt'
+    model = whisper.load_model(MODEL, device="cuda" if torch.cuda.is_available() else "cpu")
+    audio = whisper.load_audio(work['audio'])
+    if TRIM_AUDIO:
+        audio = whisper.pad_or_trim(audio)
+    result = model.transcribe(audio, verbose=True)
+    result = clean_up_timestamps(result)
+    with open(new_file, 'w') as vtt:
+        whisper.utils.write_vtt(result['segments'], file=vtt)
+    work['vtt'] = new_file
+    if 'srv2' in work: del work['srv2']
+    return work
+    
+def generate_srv2(work):
+    """Generate a SRV2 file."""
+    log("Generating SRV2")
+    recs = RecordingSet.from_recordings([Recording.from_file(work['audio'])])
+    rec_id = recs[0].id
+    captions = []
+    for i, caption in enumerate(webvtt.read(work['vtt'])):
+        if TRIM_AUDIO and i > 2: break
+        captions.append(SupervisionSegment(id=rec_id + '-sup' + '%05d' % i, channel=recs[0].channel_ids[0], recording_id=rec_id, start=to_sec(caption.start), duration=to_sec(caption.end) - to_sec(caption.start), text=caption.text, language='English'))
+    sups = SupervisionSet.from_segments(captions)
+    main = CutSet.from_manifests(recordings=recs, supervisions=sups)
+    work['cuts'] = main.trim_to_supervisions(keep_overlapping=False,keep_all_channels=True)
+    cuts_aligned = align_with_torchaudio(work['cuts'])
+    root = ET.Element("timedtext")
+    doc = ET.SubElement(root, "window")
+    for line, aligned in enumerate(cuts_aligned):
+        # Numbers are weird 
+        words = re.split(' ', captions[line].text)
+        tokenized_words = [re.sub('[^\'A-Z0-9]', '', w.upper()) for w in words]
+        if len(aligned.supervisions) == 0:
+            print(captions[line], aligned)
+            continue
+        aligned_words = list(aligned.supervisions[0].alignment['word'])
+        aligned_index = 0
+        aligned_len = len(aligned_words)
+        word_index = 0
+        word_len = len(words)
+        while word_index < word_len and aligned_index < aligned_len:
+            # log("Choosing %s %s" % (words[word_index], aligned_words[aligned_index].symbol))
+            ET.SubElement(doc, 'text',
+                              t=str(float(aligned_words[aligned_index].start)*1000),
+                              d=str(float(aligned_words[aligned_index].duration)*1000),
+                              w="1",
+                              append="1").text = words[word_index]
+            if tokenized_words[word_index] != aligned_words[aligned_index].symbol and word_index < word_len - 1:
+                # Scan ahead for a word that maches the next word, but don't go too far
+                cur_aligned = aligned_index
+                while aligned_index < aligned_len and aligned_index < cur_aligned + 5 and aligned_words[aligned_index].symbol != tokenized_words[word_index + 1]:
+                    log("Sliding to match %s %d %s" % (tokenized_words[word_index + 1], aligned_index, aligned_words[aligned_index].symbol))
+                    aligned_index = aligned_index + 1
+                if not aligned_words[aligned_index].symbol == tokenized_words[word_index + 1]:
+                    log("Resetting, couldn't find")
+                    aligned_index = cur_aligned + 1
+            else:
+                aligned_index = aligned_index + 1
+            word_index = word_index + 1
+    tree = ET.ElementTree(root)
+    work['srv2'] = work['base'] + '.srv2'
+    with open(work['srv2'], "w") as f:
+        tree.write(f.buffer)
+    return work
+
+def base_name(s):
+    """
+    Return the base name of file so that we can add extensions to it.
+    Remove tokens like --normalized, --recoded, etc.
+    Make sure the filename has either --main or --questions.
+    """
+    s = os.path.basename(s)
+    type = 'questions' if '--questions.' in s else 'main'
+    if TRIM_AUDIO:
+        type = 'test'
+    match = re.match('^(emacsconf-[0-9]+-[a-z]+--.*?--.*?)(--|\.)', s)
+    if (match):
+        return match.group(1) + '--' + type
+    else:
+        return os.path.splitext(s)[0] + '--' + type
+# assert(base_name('/home/sachac/current/sqlite/emacsconf-2022-sqlite--using-sqlite-as-a-data-source-a-framework-and-an-example--andrew-hyatt--normalized.webm.vtt') == 'emacsconf-2022-sqlite--using-sqlite-as-a-data-source-a-framework-and-an-example--andrew-hyatt--main')
+
+log(f"MODEL {MODEL} ALWAYS {ALWAYS} TRIM_AUDIO {TRIM_AUDIO}")
+directory = sys.argv[1] if len(sys.argv) > 1 else "~/current"
+needs_work = get_files_to_work_on(directory)
+if THREADS > 0:
+    torch.set_num_threads(THREADS)
+for work in needs_work:
+    log("Started processing %s" % work['base'])
+    if work['audio']:
+        if ALWAYS or not 'vtt' in work:
+            work = generate_captions(work)
+        if ALWAYS or not 'srv2' in work:
+            work = generate_srv2(work)
+#     print("Aligning words", audio_file, datetime.datetime.now())
+#     word_cuts = align_words(cuts)
+#     convert_cuts_to_word_timing(audio_file, word_cuts)
+    log("Done %s" % str(work['base']))
+    
diff --git a/talks.json b/talks.json
index 85c716d..4d10ec1 100644
--- a/talks.json
+++ b/talks.json
@@ -1 +1 @@
-{"talks":[{"start-time":"2022-12-03T14:05:00+0000","end-time":"2022-12-03T14:25:00+0000","slug":"journalism","title":"Emacs journalism (or everything's a nail if you hit it with Emacs)","speakers":"Alfred Zanini","pronouns":"he/they","pronunciation":null,"url":"2022/talks/journalism","track":"General"},{"start-time":"2022-12-03T14:45:00+0000","end-time":"2022-12-03T15:05:00+0000","slug":"school","title":"Back to school with Emacs","speakers":"Daniel Rösel","pronouns":null,"pronunciation":"ˈrøːzl̩","url":"2022/talks/school","track":"General"},{"start-time":"2022-12-03T15:15:00+0000","end-time":"2022-12-03T15:25:00+0000","slug":"handwritten","title":"How to incorporate handwritten notes into Emacs Orgmode","speakers":"Bala Ramadurai","pronouns":"his/him","pronunciation":null,"url":"2022/talks/handwritten","track":"General"},{"start-time":"2022-12-03T15:55:00+0000","end-time":"2022-12-03T16:15:00+0000","slug":"science","title":"Writing and organizing literature notes for scientific writing","speakers":"Vidianos","pronouns":"nil","pronunciation":null,"url":"2022/talks/science","track":"General"},{"start-time":"2022-12-03T18:00:00+0000","end-time":"2022-12-03T18:10:00+0000","slug":"meetups","title":"Attending and organizing Emacs meetups","speakers":"Bhavin Gandhi","pronouns":"he/him","pronunciation":null,"url":"2022/talks/meetups","track":"General"},{"start-time":"2022-12-03T18:30:00+0000","end-time":"2022-12-03T18:40:00+0000","slug":"buddy","title":"The Emacs Buddy initiative","speakers":"Andrea","pronouns":null,"pronunciation":null,"url":"2022/talks/buddy","track":"General"},{"start-time":"2022-12-03T18:50:00+0000","end-time":"2022-12-03T19:20:00+0000","slug":"community","title":"The ship that builds itself: How we used Emacs to develop a workshop for communities","speakers":"Noorah Alhasan, Joseph Corneli, Leo Vivier","pronouns":"Noorah: she/her, Joseph: he/him, Leo: he/him","pronunciation":null,"url":"2022/talks/community","track":"General"},{"start-time":"2022-12-03T19:50:00+0000","end-time":"2022-12-03T20:10:00+0000","slug":"realestate","title":"Real estate and Org table formulas","speakers":"Daniel Gopar","pronouns":"He/Him","pronunciation":null,"url":"2022/talks/realestate","track":"General"},{"start-time":"2022-12-03T20:20:00+0000","end-time":"2022-12-03T20:40:00+0000","slug":"health","title":"Health data journaling and visualization with Org Mode and GNUplot","speakers":"David O'Toole","pronouns":"he/him","pronunciation":null,"url":"2022/talks/health","track":"General"},{"start-time":"2022-12-03T21:00:00+0000","end-time":"2022-12-03T21:10:00+0000","slug":"jupyter","title":"Edit live Jupyter notebook cells with Emacs","speakers":"Blaine Mooers","pronouns":"he/him","pronunciation":"Blane Moors","url":"2022/talks/jupyter","track":"General"},{"start-time":"2022-12-04T14:05:00+0000","end-time":"2022-12-04T14:25:00+0000","slug":"survey","title":"Results of the 2022 Emacs Survey","speakers":"Timothy","pronouns":"he/him","pronunciation":null,"url":"2022/talks/survey","track":"General"},{"start-time":"2022-12-04T14:35:00+0000","end-time":"2022-12-04T14:45:00+0000","slug":"orgyear","title":"This Year in Org","speakers":"Timothy","pronouns":"he/him","pronunciation":null,"url":"2022/talks/orgyear","track":"General"},{"start-time":"2022-12-04T15:00:00+0000","end-time":"2022-12-04T15:20:00+0000","slug":"rolodex","title":"Build a Zettelkasten with the Hyperbole Rolodex","speakers":"Ramin Honary","pronouns":"he/him","pronunciation":"\"Rah-mean\" (hard-H) \"Ho-na-ree\"","url":"2022/talks/rolodex","track":"General"},{"start-time":"2022-12-04T15:40:00+0000","end-time":"2022-12-04T15:50:00+0000","slug":"orgsuperlinks","title":"Linking headings with org-super-links (poor-man's Zettelkasten)","speakers":"Karl Voit","pronouns":"he/him","pronunciation":null,"url":"2022/talks/orgsuperlinks","track":"General"},{"start-time":"2022-12-04T16:10:00+0000","end-time":"2022-12-04T16:20:00+0000","slug":"buttons","title":"Linking personal info with Hyperbole implicit buttons","speakers":"Mats Lidell","pronouns":"He,Him,His","pronunciation":null,"url":"2022/talks/buttons","track":"General"},{"start-time":"2022-12-04T18:00:00+0000","end-time":"2022-12-04T18:30:00+0000","slug":"hyperorg","title":"Powerful productivity with Hyperbole and Org Mode","speakers":"Robert Weiner","pronouns":null,"pronunciation":"wine-er","url":"2022/talks/hyperorg","track":"General"},{"start-time":"2022-12-04T18:50:00+0000","end-time":"2022-12-04T19:10:00+0000","slug":"workflows","title":"Org workflows for developers","speakers":"George Mauer","pronouns":"he/him/they/ze","pronunciation":null,"url":"2022/talks/workflows","track":"General"},{"start-time":"2022-12-04T19:30:00+0000","end-time":"2022-12-04T19:50:00+0000","slug":"grail","title":"GRAIL---A Generalized Representation and Aggregation of Information Layers","speakers":"Sameer Pradhan","pronouns":"he/him","pronunciation":null,"url":"2022/talks/grail","track":"General"},{"start-time":"2022-12-03T21:30:00+0000","end-time":"2022-12-03T21:40:00+0000","slug":"orgvm","title":"orgvm: a simple HTTP server for org","speakers":"Corwin Brust","pronouns":"he/him/any","pronunciation":null,"url":"2022/talks/orgvm","track":"General"},{"start-time":"2022-12-04T20:20:00+0000","end-time":"2022-12-04T20:40:00+0000","slug":"indieweb","title":"Putting Org Mode on the Indieweb","speakers":"Michael Herstine","pronouns":null,"pronunciation":null,"url":"2022/talks/indieweb","track":"General"},{"start-time":"2022-12-04T21:00:00+0000","end-time":"2022-12-04T21:10:00+0000","slug":"fanfare","title":"Fanfare for the Common Emacs User","speakers":"John Cummings","pronouns":null,"pronunciation":null,"url":"2022/talks/fanfare","track":"General"},{"start-time":"2022-12-04T21:00:00+0000","end-time":"2022-12-04T21:20:00+0000","slug":"localizing","title":"Pre-localizing Emacs","speakers":"Jean-Christophe Helary","pronouns":"he/him","pronunciation":null,"url":"2022/talks/localizing","track":"Development"},{"start-time":"2022-12-03T15:00:00+0000","end-time":"2022-12-03T15:10:00+0000","slug":"treesitter","title":"Tree-sitter beyond syntax highlighting","speakers":"Abin Simon","pronouns":"nil","pronunciation":null,"url":"2022/talks/treesitter","track":"Development"},{"start-time":"2022-12-03T15:20:00+0000","end-time":"2022-12-03T15:40:00+0000","slug":"lspbridge","title":"lsp-bridge: complete asynchronous LSP client","speakers":"Andy Stewart, Matthew Zeng","pronouns":"nil","pronunciation":null,"url":"2022/talks/lspbridge","track":"Development"},{"start-time":"2022-12-03T18:00:00+0000","end-time":"2022-12-03T18:20:00+0000","slug":"sqlite","title":"Using SQLite as a data source: a framework and an example","speakers":"Andrew Hyatt","pronouns":"he/him","pronunciation":null,"url":"2022/talks/sqlite","track":"Development"},{"start-time":"2022-12-03T18:45:00+0000","end-time":"2022-12-03T19:15:00+0000","slug":"mail","title":"Revisiting the anatomy of Emacs mail user agents","speakers":"Mohsen BANAN","pronouns":"he/him","pronunciation":"MO-HH-SS-EN","url":"2022/talks/mail","track":"Development"},{"start-time":"2022-12-03T20:35:00+0000","end-time":"2022-12-03T20:40:00+0000","slug":"eev","title":"Bidirectional links with eev","speakers":"Eduardo Ochs","pronouns":"nil","pronunciation":null,"url":"2022/talks/eev","track":"Development"},{"start-time":"2022-12-03T20:50:00+0000","end-time":"2022-12-03T20:55:00+0000","slug":"python","title":"Short hyperlinks to Python docs","speakers":"Eduardo Ochs","pronouns":null,"pronunciation":null,"url":"2022/talks/python","track":"Development"},{"start-time":"2022-12-03T19:50:00+0000","end-time":"2022-12-03T20:10:00+0000","slug":"maint","title":"Maintaining the Maintainers: Attribution as an Economic Model for Open Source","speakers":"Sid Kasivajhula","pronouns":"any pronouns, commonly he/him","pronunciation":null,"url":"2022/talks/maint","track":"Development"},{"start-time":"2022-12-03T21:05:00+0000","end-time":"2022-12-03T21:35:00+0000","slug":"haskell","title":"Haskell code exploration with Emacs","speakers":"Yuchen Pei","pronouns":null,"pronunciation":"he/him/himself/his/his","url":"2022/talks/haskell","track":"Development"},{"start-time":"2022-12-04T15:00:00+0000","end-time":"2022-12-04T15:20:00+0000","slug":"rde","title":"rde Emacs introduction","speakers":"Andrew Tropin","pronouns":"he/him","pronunciation":null,"url":"2022/talks/rde","track":"Development"},{"start-time":"2022-12-04T15:45:00+0000","end-time":"2022-12-04T15:55:00+0000","slug":"justl","title":"justl: Driving recipes within Emacs","speakers":"Sibi Prabakaran","pronouns":"He/Him","pronunciation":null,"url":"2022/talks/justl","track":"Development"},{"start-time":"2022-12-04T16:05:00+0000","end-time":"2022-12-04T16:35:00+0000","slug":"tramp","title":"Elisp and the TRAMP: How to NOT write code you don't have to","speakers":"Grant Shangreaux","pronouns":"he/him","pronunciation":"Shang-groo or Shang-grow are 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