Hi, I'm trying to implement hardware codec emulation by using libavcodec for doing actual coding. The hardware codec driver roughly operates as follows: 1. Send a command to decode sequence header 2. Get a stream info from the hardware 3. Knowing frame width, height, reference picture count allocate decoded picture buffers 4. Send a command to decode a frame 5. Process a decoded picture and repeat from 4 Now I have a trouble on the first two steps. I try to allocate AVCodecContext and set extradata and extradata_size to pass sequence header received from the driver. Then I call avcodec_open2() to allow the decoder to decode SPS from extradata. avcodec_open() succeeds but AVCodecContext is not updated with SPS info. So I can't provide the driver with necessary width, height and refs info. As I can see from the source code these fields are updated only when processing slice header. But I have nothing but SPS on the first command from the driver. How could I get SPS info on that stage? Thanks in advance! _______________________________________________ libav-api mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-api
