Most guides for turning a video into text begin with a detour: install a converter, extract the audio, save it as MP3, then upload that. Transcrify skips the detour. An MP4 is a container that holds a video stream and one or more audio streams, and the transcription only needs the audio. When you upload the file, the sound is read directly from the container and the picture is left alone.
This works the same for every kind of MP4 you are likely to have. A clip from an iPhone or Android camera, a screen recording made with OBS or the built-in recorder in Windows, a webinar you downloaded from a learning platform, a lecture exported from Zoom, a product demo from a sales call. If the file plays in a browser, the words in it can be transcribed.
Resolution and video codec make no difference to the result. A 4K recording and a 480p export of the same talk produce the same transcript, because the audio stream is identical. What does matter is the audio itself: a webinar with a good headset microphone transcribes cleanly, while a phone video shot from the back of a hall will have gaps where the speaker was too far from the lens.
Each segment in the transcript starts with its position in the video. That turns the text into an index of the footage. Search for a sentence, note the time, and you know exactly where to cut. Editors use this to build a paper edit of an interview before opening the timeline, and teachers use it to find the one explanation in a ninety-minute recording that students keep asking about.
If the goal is subtitles rather than a document, the same timestamps become cues. With a free account you can download the transcript as SRT or VTT and drop it onto the video in Premiere, DaVinci Resolve, Final Cut or the YouTube Studio uploader. The timing is already aligned with the audio, so there is nothing to sync by hand.
Video files are big, and this is where many online tools give up. Transcrify sends the upload in small chunks, so the size of the MP4 is not a practical problem. The limit that applies is length: as a guest you can transcribe recordings of up to 3 hours, which is enough for a full workshop or a long panel discussion in one go.
Processing is done in parallel segments, so a two-hour file does not take twice as long as a one-hour file. For most recordings you will have the transcript within a few minutes. You can leave the page while it works; the result is kept under the same link.
The speech models run on servers we operate ourselves. The video you upload is not forwarded to a third-party speech API, which matters when the recording is an internal meeting, a customer demo or footage that has not been published yet. Transcripts made without an account are kept the same way and move into your account if you create one later.
The guest transcript is read-only. A free account adds an editor for correcting names and product terms, a history of your transcriptions and downloads in SRT, VTT, ASS and TXT, with 5 hours of transcription across 10 files. AI chat with the recording, summaries and PDF or Word export belong to the paid plans.