On 14/08/2019 03:25, Carl Eugen Hoyos wrote:
Am Di., 13. Aug. 2019 um 20:58 Uhr schrieb Sergiu Giurgiu
<[email protected]>:
I am using libav in a C++ application that acts as a web server. It (the
app) provides a websocket endpoint to which a webm video is being
streamed by the client, which is a normal browser that accesses the
client's webcam. If I save the received data into a file, it can be
successfully played by a media player.
What I want to do with the data, however, is to extract/decode the video
into frames, in a std::vector<cv::Mat> which then will be sent for
further processing by some other library. What I was expecting to happen
was for the frames that make up the video to be extracted on the fly, as
I receive the data.
This is not possible for all input file formats as in some cases the
(beginning) of the file is only updated once the encoding has finished.
I understand that but here we are talking about webm in particular which
is using a simplified matroska container format and VP8 or VP9 video
codecs. I presume this has been optimized for the web to allow exactly
what I'm looking to do, has it not? Both Firefox and Chrome support it
as far as I can tell.
Replied to you personally earlier, I apologize, didn't have my coffee yet.
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