def train(log_dir, args):
save_dir = os.path.join(log_dir, 'pretrained/')
checkpoint_path = os.path.join(save_dir, 'model.ckpt')
input_path = os.path.join(args.base_dir, args.input)
plot_dir = os.path.join(log_dir, 'plots')
os.makedirs(plot_dir, exist_ok=True)
log('Checkpoint path: {}'.format(checkpoint_path))
log('Loading training data from: {}'.format(input_path))
log('Using model: {}'.format(args.model))
log(hparams_debug_string())
#Set up data feeder
coord = tf.train.Coordinator()
with tf.variable_scope('datafeeder') as scope:
feeder = Feeder(coord, input_path, hparams)
#Set up model:
step_count = 0
try:
#simple text file to keep count of global step
with open(os.path.join(log_dir, 'step_counter.txt'), 'r') as file:
step_count = int(file.read())
except:
print('no step_counter file found, assuming there is no saved checkpoint')
global_step = tf.Variable(step_count, name='global_step', trainable=False)
with tf.variable_scope('model') as scope:
model = create_model(args.model, hparams)
model.initialize(feeder.inputs, feeder.input_lengths, feeder.mel_targets, feeder.token_targets)
model.add_loss()
model.add_optimizer(global_step)
stats = add_stats(model)
#Book keeping
step = 0
time_window = ValueWindow(100)
loss_window = ValueWindow(100)
saver = tf.train.Saver(max_to_keep=5)
#Memory allocation on the GPU as needed
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
#Train
with tf.Session(config=config) as sess:
try:
summary_writer = tf.summary.FileWriter(log_dir, sess.graph)
sess.run(tf.global_variables_initializer())
#saved model restoring
if args.restore:
#Restore saved model if the user requested it, Default = True.
try:
checkpoint_state = tf.train.get_checkpoint_state(save_dir)
except tf.errors.OutOfRangeError as e:
log('Cannot restore checkpoint: {}'.format(e))
if (checkpoint_state and checkpoint_state.model_checkpoint_path):
log('Loading checkpoint {}'.format(checkpoint_state.model_checkpoint_path))
saver.restore(sess, checkpoint_state.model_checkpoint_path)
else:
if not args.restore:
log('Starting new training!')
else:
log('No model to load at {}'.format(save_dir))
#initiating feeder
feeder.start_in_session(sess)
#Training loop
while not coord.should_stop():
start_time = time.time()
step, loss, opt = sess.run([global_step, model.loss, model.optimize])
time_window.append(time.time() - start_time)
loss_window.append(loss)
message = 'Step {:7d} [{:.3f} sec/step, loss={:.5f}, avg_loss={:.5f}]'.format(
step, time_window.average, loss, loss_window.average)
log(message, end='\r')
if loss > 100 or np.isnan(loss):
log('Loss exploded to {:.5f} at step {}'.format(loss, step))
raise Exception('Loss exploded')
if step % args.summary_interval == 0:
log('\nWriting summary at step: {}'.format(step))
summary_writer.add_summary(sess.run(stats), step)
if step % args.checkpoint_interval == 0:
with open(os.path.join(log_dir,'step_counter.txt'), 'w') as file:
file.write(str(step))
log('Saving checkpoint to: {}-{}'.format(checkpoint_path, step))
saver.save(sess, checkpoint_path, global_step=step)
# Unlike the original tacotron, we won't save audio
# because we yet have to use wavenet as vocoder
log('Saving alignement and Mel-Spectrograms..')
input_seq, prediction, alignment, target = sess.run([model.inputs[0],
model.mel_outputs[0],
model.alignments[0],
model.mel_targets[0],
])
#save predicted spectrogram to disk (for plot and manual evaluation purposes)
mel_filename = 'ljspeech-mel-prediction-step-{}.npy'.format(step)
np.save(os.path.join(log_dir, mel_filename), prediction, allow_pickle=False)
#save alignment plot to disk (control purposes)
plot.plot_alignment(alignment, os.path.join(plot_dir, 'step-{}-align.png'.format(step)),
info='{}, {}, step={}, loss={:.5f}'.format(args.model, time_string(), step, loss))
#save real mel-spectrogram plot to disk (control purposes)
plot.plot_spectrogram(target, os.path.join(plot_dir, 'step-{}-real-mel-spectrogram.png'.format(step)),
info='{}, {}, step={}, Real'.format(args.model, time_string(), step, loss))
#save predicted mel-spectrogram plot to disk (control purposes)
plot.plot_spectrogram(prediction, os.path.join(plot_dir, 'step-{}-pred-mel-spectrogram.png'.format(step)),
info='{}, {}, step={}, loss={:.5}'.format(args.model, time_string(), step, loss))
log('Input at step {}: {}'.format(step, sequence_to_text(input_seq)))
except Exception as e:
log('Exiting due to exception: {}'.format(e), slack=True)
traceback.print_exc()
coord.request_stop(e)
def train(log_dir, args):
save_dir = os.path.join(log_dir, 'pretrained/')
checkpoint_path = os.path.join(save_dir, 'model.ckpt')
input_path = os.path.join(args.base_dir, args.input)
log('Checkpoint path: {}'.format(checkpoint_path))
log('Loading training data from: {}'.format(input_path))
log('Using model: {}'.format(args.model))
log(hparams_debug_string())
#Set up feeder
coord = tf.train.Coordinator()
with tf.variable_scope('datafeeder') as scope:
feeder = Feeder(coord, input_path, hparams)
#Set up model
step_count = 0
try:
#simple text file to keep count of global step
with open(os.path.join(log_dir, 'step_counter.txt'), 'r') as file:
step_count = int(file.read())
except:
print(
'no step_counter file found, assuming there is no saved checkpoint'
)
global_step = tf.Variable(step_count, name='global_step', trainable=False)
with tf.variable_scope('model') as scope:
model = create_model(args.model, hparams)
model.initialize(feeder.inputs, feeder.input_lengths,
feeder.mel_targets)
model.add_loss()
model.add_optimizer(global_step)
stats = add_stats(model)
#Book keeping
step = 0
time_window = ValueWindow(100)
loss_window = ValueWindow(100)
saver = tf.train.Saver(max_to_keep=5, keep_checkpoint_every_n_hours=2)
#Memory allocation on the GPU as needed
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
#Train
with tf.Session(config=config) as sess:
try:
summary_writer = tf.summary.FileWriter(log_dir, sess.graph)
sess.run(tf.global_variables_initializer())
#saved model restoring
if args.restore:
#Restore saved model if the user requested it, Default = True.
try:
checkpoint_state = tf.train.get_checkpoint_state(log_dir)
except tf.errors.OutOfRangeError as e:
log('Cannot restore checkpoint: {}'.format(e))
if (checkpoint_state and checkpoint_state.model_checkpoint_path):
log('Loading checkpoint {}'.format(
checkpoint_state.model_checkpoint_path))
saver.restore(sess, checkpoint_state.model_checkpoint_path)
else:
if not args.restore:
log('Starting new training!')
else:
log('No model to load at {}'.format(save_dir))
#initiating feeder
feeder.start_in_session(sess)
#Training loop
while not coord.should_stop():
start_time = time.time()
step, loss, opt = sess.run(
[global_step, model.loss, model.optimize])
time_window.append(time.time() - start_time)
loss_window.append(loss)
message = 'Step {:7d} [{:.3f} sec/step, loss={:.5f}, avg_loss={:.5f}]'.format(
step, time_window.average, loss, loss_window.average)
log(message, end='\r')
if loss > 100 or np.isnan(loss):
log('Loss exploded to {:.5f} at step {}'.format(
loss, step))
raise Exception('Loss exploded')
if step % args.summary_interval == 0:
log('\nWriting summary at step: {}'.format(step))
summary_writer.add_summary(sess.run(stats), step)
if step % args.checkpoint_interval == 0:
with open(os.path.join(log_dir, 'step_counter.txt'),
'w') as file:
file.write(str(step))
log('Saving checkpoint to: {}-{}'.format(
checkpoint_path, step))
saver.save(sess, checkpoint_path, global_step=step)
input_seq, prediction = sess.run(
[model.inputs[0], model.output[0]])
#Save an example prediction at this step
log('Input at step {}: {}'.format(
step, sequence_to_text(input_seq)))
log('Model prediction: {}'.format(
class_to_str(prediction)))
except Exception as e:
log('Exiting due to exception: {}'.format(e), slack=True)
traceback.print_exc()
coord.request_stop(e)