Maybe something like this ?
for (int i = 0; i < input_context->nb_streams; i++) {
AVStream *s = input_context->streams[i];
AVCodecContext *cc = s->codec;
avcodec_flush_buffers(cc);
}
http://lives-video.com
https://www.openhub.net/accounts/salsaman
On Fri, Mar 27, 2020 at 1:08 AM Roger Pack <[email protected]> wrote:
> You'd probably have to drill into dshow.c and maybe add a method to it?
>
> On Thu, Nov 29, 2018 at 6:16 AM DDD ZZZ <[email protected]>
> wrote:
> >
> > Hi everybody!
> > Here's the part of c++ code that I'm using to access my webcam.
> >
> > **********************************************************************
> > **********************************************************************
> >
> > int Camera::Init(char* file_name,
> > char* device_name,
> > char* format,
> > char* resolution,
> > char* frame_rate,
> > char* pixel_format)
> > {
> > av_log(NULL, AV_LOG_INFO, "---INIT STARTED---\n");
> > avdevice_register_all();
> > av_register_all();
> >
> > AVDictionary* properties_collection = NULL;
> > av_dict_set(&properties_collection, "f", format, NULL);
> > av_dict_set(&properties_collection, "video_size", resolution, NULL);
> > av_dict_set(&properties_collection, "framerate", frame_rate, NULL);
> > av_dict_set(&properties_collection, "pix_fmt", pixel_format, NULL);
> > AVInputFormat *input_format = av_find_input_format("dshow");
> > char command_line[256];
> > sprintf(command_line, "video=%s", device_name);
> > AVFormatContext *input_context = avformat_alloc_context();
> > //input_context->flags |= AVFMT_FLAG_NOBUFFER; //DOESN'T HELP
> > //input_context->max_picture_buffer = 0; //ERR
> >
> > int err_code = 0;
> > err_code = avformat_open_input(&input_context,
> > command_line,
> > input_format,
> > &properties_collection);
> >
> > //////////////////////////////////////
> > //////////PROBLEM SECTION/////////////
> > //////////////////////////////////////
> > int i = 0;
> > while (i++ < 30)
> > {
> > Sleep(1000);
> > //avformat_flush(input_context); //DOESN'T HELP
> > //av_free(input_context); //ERR
> > }
> > //////////////////////////////////////
> > system("pause");
> > return 0;
> > }
> >
> > **********************************************************************
> > **********************************************************************
> >
> > Right after "avformat_open_input()" it starts reading frames to some
> internal buffer without me even calling "av_read_frame()". After about 10
> seconds it start's giving me error messages:
> >
> > [dshow @ 0014ed40] real-time buffer [VirtualBox Webcam - FULL HD 1080P
> Webcam] [video input]
> > too full or near too full (62% of size: 3041280 [rtbufsize parameter])!
> > frame dropped!
> > ...
> > ...
> > ...
> > [dshow @ 0014ed40] real-time buffer [VirtualBox Webcam - FULL HD 1080P
> Webcam] [video input]
> > too full or near too full (100% of size: 3041280 [rtbufsize parameter])!
> > frame dropped!
> >
> >
> > Q: How to clear this buffer or avoid using it?
> >
> > Thanks in advance.
> >
> >
> >
> > P.S.Please pardon my english.
> >
> > P.P.S.Have a good day.
> >
> >
> > _______________________________________________
> > Libav-user mailing list
> > [email protected]
> > http://ffmpeg.org/mailman/listinfo/libav-user
> >
> > To unsubscribe, visit link above, or email
> > [email protected] with subject "unsubscribe".
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