}
// word-level timestamps (experimental)
-// TODO: probably still has bugs, needs refactoring, etc..
-// TODO: auto threshold
+// TODO: make ffmpeg output optional
// TODO: extra pass to detect unused speech and assign to tokens
// TODO: font parameter adjustments
+// TODO: move to whisper.h/whisper.cpp and add parameter to select max line-length of subtitles
bool output_wts(struct whisper_context * ctx, const char * fname, const char * fname_inp, const whisper_params & params, const std::vector<float> & pcmf32) {
- if (params.output_wts) {
- std::vector<float> pcm_avg(pcmf32.size(), 0);
+ std::vector<float> pcm_avg(pcmf32.size(), 0);
- // average the fabs of the signal
- {
- const int hw = 32;
+ // average the fabs of the signal
+ {
+ const int hw = 32;
- for (int i = 0; i < pcmf32.size(); i++) {
- float sum = 0;
- for (int j = -hw; j <= hw; j++) {
- if (i + j >= 0 && i + j < pcmf32.size()) {
- sum += fabs(pcmf32[i + j]);
- }
+ for (int i = 0; i < pcmf32.size(); i++) {
+ float sum = 0;
+ for (int j = -hw; j <= hw; j++) {
+ if (i + j >= 0 && i + j < pcmf32.size()) {
+ sum += fabs(pcmf32[i + j]);
}
- pcm_avg[i] = sum/(2*hw + 1);
}
+ pcm_avg[i] = sum/(2*hw + 1);
}
+ }
- struct token_info {
- int64_t t0 = -1;
- int64_t t1 = -1;
+ struct token_info {
+ int64_t t0 = -1;
+ int64_t t1 = -1;
- int64_t tt0 = -1;
- int64_t tt1 = -1;
+ int64_t tt0 = -1;
+ int64_t tt1 = -1;
- whisper_token id;
- whisper_token tid;
+ whisper_token id;
+ whisper_token tid;
- float p = 0.0f;
- float pt = 0.0f;
- float ptsum = 0.0f;
+ float p = 0.0f;
+ float pt = 0.0f;
+ float ptsum = 0.0f;
- std::string text;
- float vlen = 0.0f; // voice length of this token
- };
+ std::string text;
+ float vlen = 0.0f; // voice length of this token
+ };
- int64_t t_beg = 0;
- int64_t t_last = 0;
+ int64_t t_beg = 0;
+ int64_t t_last = 0;
- whisper_token tid_last = 0;
+ whisper_token tid_last = 0;
- std::ofstream fout(fname);
+ std::ofstream fout(fname);
- fprintf(stderr, "%s: saving output to '%s'\n", __func__, fname);
+ fprintf(stderr, "%s: saving output to '%s'\n", __func__, fname);
- fout << "!/bin/bash" << "\n";
- fout << "\n";
+ fout << "!/bin/bash" << "\n";
+ fout << "\n";
- fout << "ffmpeg -i " << fname_inp << " -f lavfi -i color=size=1200x120:duration=" << float(pcmf32.size() + 1000)/WHISPER_SAMPLE_RATE << ":rate=25:color=black -vf \"";
+ fout << "ffmpeg -i " << fname_inp << " -f lavfi -i color=size=1200x120:duration=" << float(pcmf32.size() + 1000)/WHISPER_SAMPLE_RATE << ":rate=25:color=black -vf \"";
- bool is_first = true;
+ bool is_first = true;
- for (int i = 0; i < whisper_full_n_segments(ctx); i++) {
- const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
- const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
+ for (int i = 0; i < whisper_full_n_segments(ctx); i++) {
+ const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
+ const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
- const char *text = whisper_full_get_segment_text(ctx, i);
+ const char *text = whisper_full_get_segment_text(ctx, i);
- const int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100));
- const int s1 = std::min((int) pcmf32.size(), (int) (t1*WHISPER_SAMPLE_RATE/100));
+ const int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100));
+ const int s1 = std::min((int) pcmf32.size(), (int) (t1*WHISPER_SAMPLE_RATE/100));
- const int n = whisper_full_n_tokens(ctx, i);
+ const int n = whisper_full_n_tokens(ctx, i);
- std::vector<token_info> tokens(n);
+ std::vector<token_info> tokens(n);
- if (n <= 1) {
- continue;
- }
+ if (n <= 1) {
+ continue;
+ }
- for (int j = 0; j < n; ++j) {
- struct whisper_token_data token = whisper_full_get_token_data(ctx, i, j);
+ for (int j = 0; j < n; ++j) {
+ struct whisper_token_data token = whisper_full_get_token_data(ctx, i, j);
- if (j == 0) {
- if (token.id == whisper_token_beg(ctx)) {
- tokens[j ].t0 = t0;
- tokens[j ].t1 = t0;
- tokens[j + 1].t0 = t0;
+ if (j == 0) {
+ if (token.id == whisper_token_beg(ctx)) {
+ tokens[j ].t0 = t0;
+ tokens[j ].t1 = t0;
+ tokens[j + 1].t0 = t0;
- t_beg = t0;
- t_last = t0;
- tid_last = whisper_token_beg(ctx);
- } else {
- tokens[j ].t0 = t_last;
- }
+ t_beg = t0;
+ t_last = t0;
+ tid_last = whisper_token_beg(ctx);
+ } else {
+ tokens[j ].t0 = t_last;
}
+ }
- const int64_t tt = t_beg + 2*(token.tid - whisper_token_beg(ctx));
+ const int64_t tt = t_beg + 2*(token.tid - whisper_token_beg(ctx));
- tokens[j].id = token.id;
- tokens[j].tid = token.tid;
- tokens[j].p = token.p;
- tokens[j].pt = token.pt;
- tokens[j].ptsum = token.ptsum;
+ tokens[j].id = token.id;
+ tokens[j].tid = token.tid;
+ tokens[j].p = token.p;
+ tokens[j].pt = token.pt;
+ tokens[j].ptsum = token.ptsum;
- tokens[j].text = whisper_token_to_str(ctx, token.id);
- //tokens[j].vlen = tokens[j].pt;
- tokens[j].vlen = voice_length(tokens[j].text);
+ tokens[j].text = whisper_token_to_str(ctx, token.id);
+ tokens[j].vlen = voice_length(tokens[j].text);
- if (token.pt > params.word_thold && token.ptsum > 0.01 && token.tid > tid_last && tt <= t1) {
- if (j > 0) {
- tokens[j - 1].t1 = tt;
- }
- tokens[j].t0 = tt;
- tid_last = token.tid;
+ if (token.pt > params.word_thold && token.ptsum > 0.01 && token.tid > tid_last && tt <= t1) {
+ if (j > 0) {
+ tokens[j - 1].t1 = tt;
}
+ tokens[j].t0 = tt;
+ tid_last = token.tid;
}
+ }
- tokens[n - 2].t1 = t1;
- tokens[n - 1].t0 = t1;
- tokens[n - 1].t1 = t1;
+ tokens[n - 2].t1 = t1;
+ tokens[n - 1].t0 = t1;
+ tokens[n - 1].t1 = t1;
- t_last = t1;
+ t_last = t1;
+ // find intervals of tokens with unknown timestamps
+ // fill the timestamps by proportionally splitting the interval based on the token voice lengths
+ {
int p0 = 0;
int p1 = 0;
while (true) {
const double dt = tokens[p1].t1 - tokens[p0].t0;
+ // split the time proportionally to the voice length
for (int j = p0 + 1; j <= p1; j++) {
const double ct = tokens[j - 1].t0 + dt*tokens[j - 1].vlen/psum;
- //const double ct = tokens[j - 1].t0 + (dt*(j - p0))/(p1 - p0 + 1);
- //const double ct = tokens[p0].t0 + (dt*(j - p0))/(p1 - p0 + 1);
tokens[j - 1].t1 = ct;
tokens[j ].t0 = ct;
break;
}
}
+ }
- for (int j = 0; j < n - 1; j++) {
- if (tokens[j].t1 < 0) {
- tokens[j + 1].t0 = tokens[j].t1;
- }
+ // fix up (just in case)
+ for (int j = 0; j < n - 1; j++) {
+ if (tokens[j].t1 < 0) {
+ tokens[j + 1].t0 = tokens[j].t1;
+ }
- if (j > 0) {
- if (tokens[j - 1].t1 > tokens[j].t0) {
- tokens[j].t0 = tokens[j - 1].t1;
- tokens[j].t1 = std::max(tokens[j].t0, tokens[j].t1);
- }
+ if (j > 0) {
+ if (tokens[j - 1].t1 > tokens[j].t0) {
+ tokens[j].t0 = tokens[j - 1].t1;
+ tokens[j].t1 = std::max(tokens[j].t0, tokens[j].t1);
}
-
- tokens[j].tt0 = tokens[j].t0;
- tokens[j].tt1 = tokens[j].t1;
}
- // VAD
- {
- const int hw = WHISPER_SAMPLE_RATE/8;
+ tokens[j].tt0 = tokens[j].t0;
+ tokens[j].tt1 = tokens[j].t1;
+ }
- for (int j = 0; j < n; j++) {
- if (tokens[j].id >= whisper_token_eot(ctx)) {
- continue;
- }
+ // VAD
+ // expand or contract tokens based on voice activity
+ {
+ const int hw = WHISPER_SAMPLE_RATE/8;
+
+ for (int j = 0; j < n; j++) {
+ if (tokens[j].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
- const int64_t t0 = tokens[j].t0;
- const int64_t t1 = tokens[j].t1;
+ const int64_t t0 = tokens[j].t0;
+ const int64_t t1 = tokens[j].t1;
- int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100));
- int s1 = std::min((int) pcmf32.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100));
+ int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100));
+ int s1 = std::min((int) pcmf32.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100));
- const int ss0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100) - hw);
- const int ss1 = std::min((int) pcmf32.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100) + hw);
+ const int ss0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100) - hw);
+ const int ss1 = std::min((int) pcmf32.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100) + hw);
- const int n = ss1 - ss0;
+ const int n = ss1 - ss0;
- float sum = 0.0f;
+ float sum = 0.0f;
- for (int k = ss0; k < ss1; k++) {
- sum += pcm_avg[k];
- }
+ for (int k = ss0; k < ss1; k++) {
+ sum += pcm_avg[k];
+ }
- const float thold = 0.5*sum/n;
-
- {
- int k = s0;
- if (pcm_avg[k] > thold && j > 0) {
- while (k > 0 && pcm_avg[k] > thold) {
- k--;
- }
- tokens[j].t0 = (int64_t) (100*k/WHISPER_SAMPLE_RATE);
- if (tokens[j].t0 < tokens[j - 1].t1) {
- tokens[j].t0 = tokens[j - 1].t1;
- } else {
- s0 = k;
- }
+ const float thold = 0.5*sum/n;
+
+ {
+ int k = s0;
+ if (pcm_avg[k] > thold && j > 0) {
+ while (k > 0 && pcm_avg[k] > thold) {
+ k--;
+ }
+ tokens[j].t0 = (int64_t) (100*k/WHISPER_SAMPLE_RATE);
+ if (tokens[j].t0 < tokens[j - 1].t1) {
+ tokens[j].t0 = tokens[j - 1].t1;
} else {
- while (pcm_avg[k] < thold && k < s1) {
- k++;
- }
s0 = k;
- tokens[j].t0 = 100*k/WHISPER_SAMPLE_RATE;
}
+ } else {
+ while (pcm_avg[k] < thold && k < s1) {
+ k++;
+ }
+ s0 = k;
+ tokens[j].t0 = 100*k/WHISPER_SAMPLE_RATE;
}
+ }
- {
- int k = s1;
- if (pcm_avg[k] > thold) {
- while (k < (int) pcmf32.size() - 1 && pcm_avg[k] > thold) {
- k++;
- }
- tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE;
- if (j < n - 1 && tokens[j].t1 > tokens[j + 1].t0) {
- tokens[j].t1 = tokens[j + 1].t0;
- } else {
- s1 = k;
- }
+ {
+ int k = s1;
+ if (pcm_avg[k] > thold) {
+ while (k < (int) pcmf32.size() - 1 && pcm_avg[k] > thold) {
+ k++;
+ }
+ tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE;
+ if (j < n - 1 && tokens[j].t1 > tokens[j + 1].t0) {
+ tokens[j].t1 = tokens[j + 1].t0;
} else {
- while (pcm_avg[k] < thold && k > s0) {
- k--;
- }
s1 = k;
- tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE;
}
+ } else {
+ while (pcm_avg[k] < thold && k > s0) {
+ k--;
+ }
+ s1 = k;
+ tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE;
}
}
}
+ }
+ // fixed token expand (optional)
+ {
const int t_expand = 0;
for (int j = 0; j < n; j++) {
tokens[j].t1 = tokens[j].t1 + t_expand;
}
}
+ }
- for (int j = 0; j < n; ++j) {
- const auto & token = tokens[j];
- const auto tt = token.pt > params.word_thold && token.ptsum > 0.01 ? whisper_token_to_str(ctx, token.tid) : "[?]";
- printf("%s: %10s %6.3f %6.3f %6.3f %6.3f %5d %5d '%s'\n", __func__,
- tt, token.p, token.pt, token.ptsum, token.vlen, (int) token.t0, (int) token.t1, token.text.c_str());
+ // debug info
+ // TODO: toggle via parameter
+ for (int j = 0; j < n; ++j) {
+ const auto & token = tokens[j];
+ const auto tt = token.pt > params.word_thold && token.ptsum > 0.01 ? whisper_token_to_str(ctx, token.tid) : "[?]";
+ printf("%s: %10s %6.3f %6.3f %6.3f %6.3f %5d %5d '%s'\n", __func__,
+ tt, token.p, token.pt, token.ptsum, token.vlen, (int) token.t0, (int) token.t1, token.text.c_str());
- if (tokens[j].id >= whisper_token_eot(ctx)) {
- continue;
- }
+ if (tokens[j].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
- //printf("[%s --> %s] %s\n", to_timestamp(token.t0).c_str(), to_timestamp(token.t1).c_str(), whisper_token_to_str(ctx, token.id));
+ //printf("[%s --> %s] %s\n", to_timestamp(token.t0).c_str(), to_timestamp(token.t1).c_str(), whisper_token_to_str(ctx, token.id));
- //fout << "# " << to_timestamp(token.t0) << " --> " << to_timestamp(token.t1) << " " << whisper_token_to_str(ctx, token.id) << "\n";
- }
+ //fout << "# " << to_timestamp(token.t0) << " --> " << to_timestamp(token.t1) << " " << whisper_token_to_str(ctx, token.id) << "\n";
+ }
- static const int line_wrap = 60;
- static const char * font = "/System/Library/Fonts/Supplemental/Courier New Bold.ttf";
+ // TODO: become parameters
+ static const int line_wrap = 60;
+ static const char * font = "/System/Library/Fonts/Supplemental/Courier New Bold.ttf";
- if (!is_first) {
- fout << ",";
- }
+ if (!is_first) {
+ fout << ",";
+ }
- // background text
- fout << "drawtext=fontfile='" << font << "':fontsize=24:fontcolor=gray:x=(w-text_w)/2:y=h/2:text='':enable='between(t," << t0/100.0 << "," << t0/100.0 << ")'";
+ // background text
+ fout << "drawtext=fontfile='" << font << "':fontsize=24:fontcolor=gray:x=(w-text_w)/2:y=h/2:text='':enable='between(t," << t0/100.0 << "," << t0/100.0 << ")'";
- is_first = false;
+ is_first = false;
- for (int j = 0; j < n; ++j) {
- const auto & token = tokens[j];
+ for (int j = 0; j < n; ++j) {
+ const auto & token = tokens[j];
- if (tokens[j].id >= whisper_token_eot(ctx)) {
- continue;
- }
+ if (tokens[j].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
- std::string txt_bg;
- std::string txt_fg; // highlight token
- std::string txt_ul; // underline
+ std::string txt_bg;
+ std::string txt_fg; // highlight token
+ std::string txt_ul; // underline
- txt_bg = "> ";
- txt_fg = "> ";
- txt_ul = "\\ \\ ";
+ txt_bg = "> ";
+ txt_fg = "> ";
+ txt_ul = "\\ \\ ";
- {
- int ncnt = 0;
- for (int k = 0; k < n; ++k) {
- const auto & token2 = tokens[k];
+ {
+ int ncnt = 0;
+ for (int k = 0; k < n; ++k) {
+ const auto & token2 = tokens[k];
- if (tokens[k].id >= whisper_token_eot(ctx)) {
- continue;
- }
+ if (tokens[k].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
- const std::string txt = whisper_token_to_str(ctx, token2.id);
+ const std::string txt = whisper_token_to_str(ctx, token2.id);
- txt_bg += txt;
+ txt_bg += txt;
- if (k == j) {
- for (int l = 0; l < (int) txt.size(); ++l) {
- txt_fg += txt[l];
- txt_ul += "_";
- }
- txt_fg += "|";
- } else {
- for (int l = 0; l < (int) txt.size(); ++l) {
- txt_fg += "\\ ";
- txt_ul += "\\ ";
- }
+ if (k == j) {
+ for (int l = 0; l < (int) txt.size(); ++l) {
+ txt_fg += txt[l];
+ txt_ul += "_";
}
-
- ncnt += txt.size();
-
- if (ncnt > line_wrap) {
- if (k < j) {
- txt_bg = "> ";
- txt_fg = "> ";
- txt_ul = "\\ \\ ";
- ncnt = 0;
- } else {
- break;
- }
+ txt_fg += "|";
+ } else {
+ for (int l = 0; l < (int) txt.size(); ++l) {
+ txt_fg += "\\ ";
+ txt_ul += "\\ ";
}
}
- ::replace_all(txt_bg, "'", "’");
- ::replace_all(txt_bg, "\"", "\\\"");
- ::replace_all(txt_fg, "'", "’");
- ::replace_all(txt_fg, "\"", "\\\"");
+ ncnt += txt.size();
+
+ if (ncnt > line_wrap) {
+ if (k < j) {
+ txt_bg = "> ";
+ txt_fg = "> ";
+ txt_ul = "\\ \\ ";
+ ncnt = 0;
+ } else {
+ break;
+ }
+ }
}
- // background text
- fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=gray:x=(w-text_w)/2:y=h/2:text='" << txt_bg << "':enable='between(t," << token.tt0/100.0 << "," << token.tt1/100.0 << ")'";
+ ::replace_all(txt_bg, "'", "’");
+ ::replace_all(txt_bg, "\"", "\\\"");
+ ::replace_all(txt_fg, "'", "’");
+ ::replace_all(txt_fg, "\"", "\\\"");
+ }
+
+ // background text
+ fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=gray:x=(w-text_w)/2:y=h/2:text='" << txt_bg << "':enable='between(t," << token.tt0/100.0 << "," << token.tt1/100.0 << ")'";
- // foreground text
- fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=lightgreen:x=(w-text_w)/2+8:y=h/2:text='" << txt_fg << "':enable='between(t," << token.t0/100.0 << "," << token.t1/100.0 << ")'";
+ // foreground text
+ fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=lightgreen:x=(w-text_w)/2+8:y=h/2:text='" << txt_fg << "':enable='between(t," << token.t0/100.0 << "," << token.t1/100.0 << ")'";
- // underline
- fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=lightgreen:x=(w-text_w)/2+8:y=h/2+16:text='" << txt_ul << "':enable='between(t," << token.t0/100.0 << "," << token.t1/100.0 << ")'";
- }
+ // underline
+ fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=lightgreen:x=(w-text_w)/2+8:y=h/2+16:text='" << txt_ul << "':enable='between(t," << token.t0/100.0 << "," << token.t1/100.0 << ")'";
}
+ }
- fout << "\" -c:v libx264 -pix_fmt yuv420p -y " << fname_inp << ".mp4" << "\n";
+ fout << "\" -c:v libx264 -pix_fmt yuv420p -y " << fname_inp << ".mp4" << "\n";
- fout << "\n\n";
- fout << "echo \"Your video has been saved to " << fname_inp << ".mp4\"" << "\n";
- fout << "\n";
- fout << "echo \" ffplay " << fname_inp << ".mp4\"\n";
- fout << "\n";
+ fout << "\n\n";
+ fout << "echo \"Your video has been saved to " << fname_inp << ".mp4\"" << "\n";
+ fout << "\n";
+ fout << "echo \" ffplay " << fname_inp << ".mp4\"\n";
+ fout << "\n";
- fout.close();
+ fout.close();
- fprintf(stderr, "%s: run 'source %s' to generate karaoke video\n", __func__, fname);
- }
+ fprintf(stderr, "%s: run 'source %s' to generate karaoke video\n", __func__, fname);
return true;
}
overview / pkg / ggml / sources / whisper.cpp / commitdiff