My inference is completely blank after training

[JRMeyer]

>>> araf.hasan15
[November 29, 2019, 1:34pm]

I trained just 500 audio data (Bangla), Amount of data I took to train
is: slash
train.csv slash -- slash > 500 slash
dev.csv slash -- slash > 100 slash
test.csv slash -- slash > 30 slash
I trained my data approximately 15 hours, I have completed 3 epochs (in
edition my machine take too much time to train), when I make the
'output_graph.pb' and 'output_graph.pbmm' from this training parameter,
and run the inference for checking output the inference is completely
blank, No transcript is shown there. I expect at least one character
should show in inference, but it is not happening. (NB: I successfully
build my own 'lm' and 'trie' file). Inference also show this file loaded
successfully. But no transcription is shown there. I paste my complete
inference operation here:

araf15araf15-HP-Pavilion-Notebook:~/test_Gen_Bangla$ deepspeech --model models/output_graph.pbmm --alphabet models/alphabet.txt --lm models/lm.binary --trie models/trie --audio common_voice_bn_00000008.wav
Loading model from file models/output_graph.pbmm
TensorFlow: v1.13.1-10-g3e0cc53
DeepSpeech: v0.5.1-0-g4b29b78
2019-11-29 19:01:41.863077: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA
2019-11-29 19:01:41.868988: E tensorflow/core/framework/op_kernel.cc:1325] OpKernel ('op: 'UnwrapDatasetVariant' device_type: 'CPU'') for unknown op: UnwrapDatasetVariant
2019-11-29 19:01:41.869023: E tensorflow/core/framework/op_kernel.cc:1325] OpKernel ('op: 'WrapDatasetVariant' device_type: 'GPU' host_memory_arg: 'input_handle' host_memory_arg: 'output_handle'') for unknown op: WrapDatasetVariant
2019-11-29 19:01:41.869032: E tensorflow/core/framework/op_kernel.cc:1325] OpKernel ('op: 'WrapDatasetVariant' device_type: 'CPU'') for unknown op: WrapDatasetVariant
2019-11-29 19:01:41.869108: E tensorflow/core/framework/op_kernel.cc:1325] OpKernel ('op: 'UnwrapDatasetVariant' device_type: 'GPU' host_memory_arg: 'input_handle' host_memory_arg: 'output_handle'') for unknown op: UnwrapDatasetVariant
Loaded model in 0.00804s.
Loading language model from files models/lm.binary models/trie
Loaded language model in 0.00941s.
Running inference.

Inference took 2.314s for 2.880s audio file.

Can anyone please give me any idea where I am going wrong ?

[This is an archived TTS discussion thread from discourse.mozilla.org/t/my-inference-is-completely-blank-after-training]

[JRMeyer]

>>> lissyx
[November 29, 2019, 1:35pm]

> Can anyone please give me any idea where I am going wrong ?

You just don't have enough data and trained for not long enough. So you
have a transcript, it's just empty.

[Archived Post]

[JRMeyer]

>>> araf.hasan15
[November 29, 2019, 1:47pm]

can you please mention me. At
least how much training data should I have, and at least how many epochs
should I complete to get a rough transcription.

[Archived Post]

[JRMeyer]

>>> lissyx
[November 29, 2019, 1:49pm]

This is hard to say, as is. For englis we have 3000-4000 hours of data
for training. Number of epochs depends on others parameters, but you
would need at least 15-20 with a decent amount of data. For french, I
use slash ~600h of data and train for 25 epochs.

[Archived Post]

[JRMeyer]

>>> araf.hasan15
[November 29, 2019, 1:54pm]

Thanx, It's a very useful
information I am searching for...!!!

[Archived Post]