FAQ for AI.opensubtitles.com

Last Updated: February 16, 2024, 3:56 pm

AI.opensubtitles.com is an online platform that utilizes artificial intelligence to transcribe and translate audio and video files. Users can easily convert their multimedia content into text and translate it into various languages.

In early 2023, a company approached me with the goal of automating the subtitling process for their extensive collection of software tutorial videos. They wanted to generate subtitles and translate them into multiple languages. In response, I developed a PHP backend, accessible through REST API, to automate audio track extraction and transcription using an AI model. Subsequently, I created a web front end using HTML5, Javascript, and WASM modules to provide users with a user-friendly means of extracting audio tracks from movie files and generating subtitles.

After discussions with the developer of OpenSubtitles.org, the largest public database for movie subtitles, we decided to host the platform on a subdomain. We integrated the user base from the main domain using a mechanism similar to OAuth2, allowing users of OpenSubtitles.org to log in to AI.OpenSubtitles.com with their main site credentials. At this stage, we introduced a credit-based payment system, utilizing the payment provider service from the main site.

Over the following months, I conducted extensive testing on various AI models for transcription and translation. The successful models were incorporated into the subtitle generator platform, providing users with a diverse range of choices. In July 2023, AI.OpenSubtitles.com was officially launched and has since experienced growth in both user numbers and the selection of available AI models.

Our platform makes it easy for users to upload their audio, video, or subtitle files. You can choose from various AI models and languages to generate subtitles or translate existing ones. Behind the scenes, our advanced algorithms ensure speedy and accurate transcriptions and translations. What makes us stand out is our use of client-side audio extraction from movies, thanks to FFmpeg wasm. This means we can generate subtitles faster and more efficiently than many other platforms, providing our users with a smooth and streamlined experience.

In addition to these features, our credit-based payment system adds another layer of convenience. Users have the flexibility to purchase credits, which are then utilized when accessing AI services. This pay-as-you-go approach ensures cost-effectiveness, allowing users to pay only for the specific services they need. The credits never expire, providing users with the freedom to integrate AI services seamlessly into their workflows without the pressure of expiration dates. This unique advantage empowers our users with control, flexibility, and personalized cost-efficiency in their interactions with our platform.

AI.opensubtitles.com supports a wide range of languages. Users can select the desired language for transcription based on their preferences.

Transcription Languages

AWS
  • en
  • ab-GE
  • af-ZA
  • ar-AE
  • ar-SA
  • hy-AM
  • ast-ES
  • az-AZ
  • ba-RU
  • eu-ES
  • be-BY
  • bn-IN
  • bs-BA
  • bg-BG
  • ca-ES
  • ckb-IR
  • ckb-IQ
  • zh-CN
  • zh-TW
  • hr-HR
  • cs-CZ
  • da-DK
  • nl-NL
  • en-AU
  • en-GB
  • en-IN
  • en-IE
  • en-NZ
  • en-AB
  • en-ZA
  • en-US
  • en-WL
  • et-ET
  • fa-IR
  • fi-FI
  • fr-FR
  • fr-CA
  • gl-ES
  • ka-GE
  • de-DE
  • de-CH
  • el-GR
  • gu-IN
  • ha-NG
  • he-IL
  • hi-IN
  • hu-HU
  • is-IS
  • id-ID
  • it-IT
  • ja-JP
  • kab-DZ
  • kn-IN
  • kk-KZ
  • rw-RW
  • ko-KR
  • ky-KG
  • lv-LV
  • lt-LT
  • lg-IN
  • mk-MK
  • ms-MY
  • ml-IN
  • mt-MT
  • mr-IN
  • mhr-RU
  • mn-MN
  • no-NO
  • or-IN
  • ps-AF
  • pl-PL
  • pt-PT
  • pt-BR
  • pa-IN
  • ro-RO
  • ru-RU
  • sr-RS
  • si-LK
  • sk-SK
  • sl-SI
  • so-SO
  • es-ES
  • es-US
  • su-ID
  • sw-KE
  • sw-BI
  • sw-RW
  • sw-TZ
  • sw-UG
  • sv-SE
  • tl-PH
  • ta-IN
  • tt-RU
  • te-IN
  • th-TH
  • tr-TR
  • uk-UA
  • ug-CN
  • uz-UZ
  • vi-VN
  • cy-WL
  • wo-SN
  • zu-ZA
ASSEMBLYAI
  • en
  • en_au
  • en_gb
  • en_us
  • es
  • fr
  • de
  • it
  • pt
  • nl
  • hi
  • ja
  • zh
  • fi
  • ko
  • pl
  • ru
  • tr
  • uk
  • vi
DEEPGRAM
  • zh
  • zh-CN
  • zh-TW
  • da
  • nl
  • en
  • en-US
  • fr
  • fr-CA
  • de
  • hi
  • hi-Latn
  • id
  • it
  • ja
  • ko
  • no
  • pl
  • pt
  • pt-BR
  • ru
  • es
  • es-419
  • es-LATAM
  • sv
  • ta
  • taq
  • tr
  • uk
OPENAI
  • af-ZA
  • ar-SA
  • hy-AM
  • az-AZ
  • be-BY
  • bs-BA
  • bg-BG
  • ca-ES
  • zh-CN
  • hr-HR
  • cs-CZ
  • da-DK
  • nl-NL
  • en
  • en-US
  • et-EE
  • fi-FI
  • fr-FR
  • gl-ES
  • de-DE
  • el-GR
  • he-IL
  • hi-IN
  • hu-HU
  • is-IS
  • id-ID
  • it-IT
  • ja-JP
  • kn-IN
  • kk-KZ
  • ko-KR
  • lv-LV
  • lt-LT
  • mk-MK
  • ms-MY
  • mr-IN
  • mi-NZ
  • ne-NP
  • nb-NO
  • fa-IR
  • pl-PL
  • pt-PT
  • ro-RO
  • ru-RU
  • sr-RS
  • sk-SK
  • sl-SI
  • es-ES
  • sw-KE
  • sv-SE
  • tl-PH
  • ta-IN
  • th-TH
  • tr-TR
  • uk-UA
  • ur-PK
  • vi-VN
  • cy-GB

For more information about the languages used by our AI models, please click here

The platform continually tests new and upcoming AI models for translation and transcription, providing users with a diverse selection of options in terms of both pricing and quality. Our platform offers multiple AI models with varying levels of accuracy and features. Users can choose the model that best fits their requirements.

Transcription AI models

  • AWS
  • ASSEMBLYAI
  • DEEPGRAM
  • OPENAI

Translation AI models

  • DEEPL
  • AWS
  • LT

More information about our AI models you can find here.

Our pricing structure is determined by the usage of credits, which is influenced by both the chosen AI model and the duration of the uploaded file. In the case of transcription, the calculation is based on seconds, with each AI model having a distinct rate per second. When dealing with subtitle files, the count is on written characters, excluding timestamps from the calculation.

Transcription Models

AI Model Credits*
AWS 7.2
ASSEMBLYAI 2.7
OPENAI 1.08
DEEPGRAM 1.62

* per minute

Translation Models

AI Model Credits*
AWS 4.5
DEEPL 3
LT 0.3

* per 1000 characters

Please check the pricing details for this platform.

Credits operate as a flexible and user-centric payment method, offering distinct advantages over traditional subscriptions. Users have the ability to purchase credits, which are then utilized when accessing AI services. The beauty of this system lies in its adaptability, allowing users to harness AI capabilities at their own pace without being tied to monthly or yearly subscriptions. These credits never expire, providing users with the freedom to use them whenever needed.

The longevity of credits ensures that users can seamlessly integrate AI services into their workflows without the pressure of expiration dates. Whether it's a short-term project or an ongoing requirement, the credits remain valid indefinitely. This flexibility aligns with varying user needs and eliminates the rush to utilize credits within a specific timeframe.

Furthermore, the credit-based system promotes cost-effectiveness by enabling users to pay for the precise services they consume. Unlike fixed subscription fees, credits are spent based on the specific AI services accessed and corresponding usage. This pay-as-you-go approach guarantees that users only pay for the services they require, offering a personalized and economical solution tailored to individual needs. In essence, credits empower users with control, flexibility, and cost-efficiency when utilizing AI services.

Yes, AI.OpenSubtitles.com offers trial credits exclusively to VIP users of our main site (OpenSubtitles.org), allowing them to experience the platform before making a purchase. If you are an VIP user please use this page to contact us for a trial.

Please note that purchasing credits for AI.OpenSubtitles.com does not include a VIP account on our main site, OpenSubtitles.org. To access VIP features on our main site, a separate subscription is required, and it comes with a one-year duration.

The platform prioritizes user privacy, ensuring secure processing of files and adhering to rigorous privacy and security measures. Subtitles generated through transcription or translation are exclusively accessible to the user who created them.

AI.OpenSubtitles.com does not retain any login/password information; instead, it employs an OAuth2 system to access user-related data from the site on the root domain.

For further information, please consult the platform's privacy policy.

The platform supports a variety of common audio and video file formats:

  • MP4: A widely used container format for audio and video, as well as subtitles and metadata. It can store various codecs, such as H.264, AAC, MP3, etc. It has the extension .mp4.
  • MKV: A flexible and open container format for audio, video, subtitles, and metadata. It can store almost any codec, such as H.265, VP9, Opus, etc. It has the extension .mkv.
  • WebM: A subset of Matroska designed for web streaming. It can store VP8, VP9, or AV1 video and Vorbis or Opus audio. It has the extension .webm.
  • TS: A standard container format for digital broadcasting and streaming. It can store MPEG-2, H.264, or HEVC video and MP2, MP3, AAC, or AC-3 audio. It has the extension .ts or .m2ts.
  • AVI: An old but still popular container format for audio and video. It can store various codecs, such as DivX, Xvid, MP3, etc. It has the extension .avi.
  • MOV: A container format developed by Apple for audio and video, as well as subtitles and metadata. It can store various codecs, such as H.264, AAC, MP3, etc. It has the extension .mov.
  • FLV: A container format used by Adobe Flash Player for web streaming. It can store H.263, VP6, or H.264 video and MP3 or AAC audio. It has the extension .flv.
  • Ogg: A container format for audio, video, subtitles, and metadata. It can store Vorbis, Opus, Theora, or Daala codecs. It has the extension .ogg or .ogv.
  • WAV: A standard container format for uncompressed audio. It can store PCM, ADPCM, or other audio codecs. It has the extension .wav.
  • MP3: A widely used container format for compressed audio. It can store MPEG-1 or MPEG-2 audio layer III codec. It has the extension .mp3.
  • AAC: A container format for compressed audio. It can store AAC codec. It has the extension .aac or .m4a.
  • FLAC: A container format for lossless audio compression. It can store FLAC codec. It has the extension .flac.

For any inquiries or assistance, you can reach out to the platform's customer support.

Or contact us by eMail: Protected

Ensure that the language selected for generating subtitles from a movie or audio track matches the spoken language. Translation and transcription are distinct processes and cannot be conducted simultaneously. To proceed, transcription must be completed before translating subtitles into another language.

Yes, the platform caters to both personal and commercial users. Review the pricing packages to find the best fit for your usage.

Kindly check the following page to see if your translation or transcription is available there:
Visit: /profile/activities
It's possible that the process was successfully completed on our server but encountered issues when communicating with the front end of our site. Even if your browser crashes, rest assured that your file should still be processed on our server. In the rare instance that you cannot locate your file on the provided page, please inform us, and we will promptly investigate the issue and refund your credits.

We regret any inconvenience caused, but it appears that the FFmpeg WASM audio extraction/format conversion task could not be successfully completed. This is likely due to FFmpeg WASM reaching its memory limit, influenced by OS or browser constraints.

FFmpeg WASM is an innovative technology enabling the use of FFmpeg, a robust multimedia processing tool, directly within the browser without requiring installation or server-side processing. However, FFmpeg WASM has limitations, particularly regarding the amount of memory it can utilize. Depending on your OS and browser settings, FFmpeg WASM might face challenges accessing sufficient memory for processing large or complex files, resulting in errors or failures.

Possible solutions:

  • Attempt the task again with a smaller file.
  • Retry the process on a system with more available memory.
  • Alternatively, you can manually extract the audio track using free software options such as:
    • Pazera Free Audio Extractor: A Windows-only software capable of extracting audio from various video formats, saving it as MP3, AAC, WMA, FLAC, OGG, or WAV.
    • VLC Media Player: A cross-platform multimedia player that plays and converts various video and audio formats. It can extract audio from video files, saving it as MP3, FLAC, or other formats.
    • Filmora9: A video editing software capable of extracting audio from video files, enhancing sound quality. It supports various video and audio formats, offering numerous audio effects and tools.
    • Audio Converter: An online audio extraction tool that can extract audio from video files, saving it as MP3, WAV, M4A, FLAC, or other formats. It works on any browser, although it may be slower.