Translate Portuguese video to English
The speech model can write English while it listens to Portuguese, and of all the languages Shycut offers it does this best: 31.2 BLEU for Accurate in OpenAI’s figures.
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How well it translates Portuguese into English
| Model in Shycut | BLEU into English | From the paper |
|---|---|---|
| Accurate (Whisper small) | 31.2 | Table 14, “Whisper small” row, Portuguese column · OpenAI |
| Fast (Whisper base) | 22.4 | Table 14, “Whisper base” row, Portuguese column · OpenAI |
BLEU compares a machine translation with human ones; higher is closer. These are OpenAI’s scores on the FLEURS set.
Accurate scores 1.4 times as high as Fast here, so a translate link opens Shycut with Accurate chosen.
How often it gets a Portuguese word wrong
| Model in Shycut | Word error rate | Roughly | From the paper |
|---|---|---|---|
| Accurate (Whisper small) | 7.3% | 1 word in 14 | Table 13, “Whisper small” row, Portuguese column · OpenAI |
| Fast (Whisper base) | 13% | 1 word in 8 | Table 13, “Whisper base” row, Portuguese column · OpenAI |
Word error rate is the share of words a model gets wrong (swapped, missed or added) against a human transcript, in OpenAI’s own test on the FLEURS speech set; lower is better.
Shycut runs these two models converted to work in a browser (with 8-bit or 4-bit weights on some devices), so its results can differ a little from the paper’s.
How the translation is made
- While it listens
- The speech model writes English as it hears the Portuguese: no separate translation step, and nothing is sent anywhere.
- Timed to the speech
- Each line follows the speech it translates; the timing of single words is approximate, since English word order differs.
- Kept apart from the script
- English words aren’t the ones said, so Shycut doesn’t use them to cut the video or find hesitations; the Text tab offers to write the speech as spoken.
The best translation in the list
Portuguese comes first of the 9 languages Shycut can translate. Even the Fast model scores 22.4, the only language where Fast clears Shycut’s line of 15, though Accurate is still 1.4 times as high.
A model translation keeps the meaning but not always the wording you would choose. Read the English lines through and adjust names and phrases before saving or downloading the SRT.
How to do it in Shycut
Open your video
The button opens Shycut set to translate Portuguese speech into English, with the Accurate model chosen.
Write the English captions
The model listens to the speech and writes English lines, timed to it, on your device.
Check, then save
Read the lines through, correct what needs it, then save the video with them or download an SRT file.
Where these facts come from
Questions
How good is the Portuguese to English translation?
OpenAI reports 31.2 BLEU for the Accurate model and 22.4 for Fast, the highest of the languages Shycut offers.
Are the English captions timed?
Yes. Each line follows the Portuguese speech it translates; single-word timing is approximate.
Is the video uploaded to translate it?
No. The model runs in your browser and translates on your device.
Your video stays with you.
Open Shycut, drop the video in and export. Free, with no account, and your video never leaves your device.
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