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libavformat [2018/06/09 21:00] beandog created |
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On a DVD, because you're not opening a file, you would tell the demuxer what you're going to send it in the stream -- video size, pixel format, and maybe more. See [[https://www.ffmpeg.org/doxygen/3.4/group__lavu__dict.html#ga8d9c2de72b310cef8e6a28c9cd3acbbe|av_dict_set()]] for setting attributes in an [[https://www.ffmpeg.org/doxygen/3.4/structAVDictionary.html|AVDictionary]] struct. | On a DVD, because you're not opening a file, you would tell the demuxer what you're going to send it in the stream -- video size, pixel format, and maybe more. See [[https://www.ffmpeg.org/doxygen/3.4/group__lavu__dict.html#ga8d9c2de72b310cef8e6a28c9cd3acbbe|av_dict_set()]] for setting attributes in an [[https://www.ffmpeg.org/doxygen/3.4/structAVDictionary.html|AVDictionary]] struct. | ||
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+ | [[https://www.ffmpeg.org/doxygen/3.4/group__lavf__decoding.html#ga31d601155e9035d5b0e7efedc894ee49|avformat_open_input()]] will scan the input until it finds out what it is. |