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Editorial Team
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Asked: 2026-06-01T07:02:41+00:00

I am experimenting with video and would like to know how I can extract

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I am experimenting with video and would like to know how I can extract I-frames from H264 contained in MPEG-TS container.
What I want to do is generate preview images out of a video stream.
As the I-frame is supposed to be a complete picture fro which P- and B-Frames derive, is there a possibility to just extract the data of the picture without having to decode it using a codec?

I have already done some work with MPEG-TS container format but I am not that much specialized in codecs.

I am rather in search of information.

Thanks a lot.

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1 Answer

  1. Editorial Team

    I am no expert in this domain but I believe the answer to your question is NO.

    If you want to save the I-frame as a JPEG image, you still need to “transcode” the video frame i.e. you first need to decode the I-frame using a H264 decoder and then encode it using a JPEG encoder. This is so because the JPEG encoder does not understand a H264 frame, it only accepts uncompressed video frames as input.

    As an aside, since the input to the JPEG encoder is an uncompressed frame, you can generate a JPEG image from any type of frame (I/P/B) as it would already be decoded (using reference I frame, if needed) before feeding to the encoder.

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