Hello, I've been using FFMPEG as a demultiplexer. Meaning I'm only using it to analyze an MPEG2 transport stream ( retrieving basic information such as video width/height/H.264 extradata etc), and extract frames to be decoded by another API.
However avformat_find_stream_info and avformat_open_input take way too long (about 5 seconds for 2K streams). These functions seem to consume way too much data than necessary (around 4MB). I tried reducing "probesize" and "analyzeduration" parameters with mixed results. Sometimes it indeed does speed up mentioned function calls; however they often just result in the functions failing (i.e. they don't get enough data to provide me with all the information I need). So my question is: Is there a way to tell FFMPEG to stop analyzing the stream once it gathers all the basic information (video width/height, h.264/HEVC extra data or audio sample rate/number of channels) ? I really need a way of speeding up these two function calls (5 seconds is not acceptable for my needs). Thanks in advance, Nikola _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
