FAQ for AI.opensubtitles.com

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.

We support the following file formats for subtitles, video, and audio:

Type	Supported Formats
Subtitle Files	.srt, .vtt, .txt
Video Files	.mp4, .mov, .avi, .mkv, .flv, .wmv, .webm, .m4v, .3gp
Audio Files	.mp3, .wav, .aac, .ogg, .flac, .m4a, .wma, .amr

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

Ensure that the selected language matches the spoken language of your file. Incorrect selections may lead to unusable results, as the AI relies on this setting to process transcription and translation accurately.

Transcription Languages

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
• NANO
• OPENAI
• SALAD
• DEEPGRAM

Translation AI models

• DEEPL
• DEEPL2
• AWS

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.

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.

Migrating your user login from OpenSubtitles.org to OpenSubtitles.com is quick and easy. Simply follow these steps:

1. Visit OpenSubtitles.com Login Page.
2. Click on the “IMPORT FROM OPENSUBTITLES.ORG” button.
3. Follow the instructions to complete the migration of your account.

After migration, your existing credits will be availible to your OpenSubtitles.com account, and you can continue to use both logins until OpenSubtitles.org is retired.

Please note, it is not possible to migrate from an .com account to an .org account.

• AWS Transcribe:
  • Maximum file size: Up to 2 GB
  • Maximum duration: Up to 4 hours per file
• AssemblyAI:
  • Maximum file size: Up to 2 GB
  • Maximum duration: Up to 5 hours per file
• Nano:
  • Maximum file size: Up to 2 GB
  • Maximum duration: Up to 5 hours per file
• Salad (Whisper based):
  • Maximum file size: Up to 1.5 GB (without splitting)
  • Maximum duration: Around 3.5 hours
• OpenAI (Whisper API):
  • Maximum file size: Up to 25 MB (without splitting)
  • Maximum duration: Around 1.5 hours

Please ensure your files meet these limits for smooth transcription processing.

We offer two methods for translating subtitle files using DeepL AI: DeepL2 and regular DeepL translation. Here's how they differ:

DeepL2 Translation

• How it works: The DeepL2 setting allows DeepL to handle the entire subtitle file directly. The file is parsed, translated, and output as a translated subtitle file—all within the DeepL service.
• Advantages:
  • Processes the entire file at once, preserving context across the translation.
  • Optimized specifically for translating movie content, ensuring better accuracy and coherence.
• Disadvantages:
  • Occasionally, files fail to process for unknown reasons (at least unknown to us).

Regular DeepL Translation

• How it works: Our system parses the subtitle file and sends only the text portions to DeepL for translation. Once translated, our scripts recreate a subtitle file with the translated text.
• Advantages:
  • Offers a reliable fallback option if DeepL2 encounters issues.
• Disadvantages:
  • Limited to smaller text blocks per request due to API constraints.
  • If the text is split across multiple requests, there is a slight risk of losing context between blocks (e.g., the flow from the end of one block to the start of the next might not fully align).

If the transcription output is in the wrong language, ensure you’ve selected the spoken language of the audio file during the transcription step. Transcription and translation cannot be completed simultaneously. First, transcribe the file, then translate it into your desired language.

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, open-source software options such as:
  • Shutter Encoder: A cross-platform app (Windows, macOS) that easily extracts audio and converts it to MP3.
  • HandBrake: A cross-platform video conversion tool with audio extraction and MP3 conversion options.