Save bitmap to video (libavcodec ffmpeg)?

I am not familiar with the stuff you are using to get the bitmap, but assuming it is correct and you have a pointer to the BGR 32-bit/pixel data, try something like this.

I am not familiar with the stuff you are using to get the bitmap, but assuming it is correct and you have a pointer to the BGR 32-bit/pixel data, try something like this: uint8_t* inbuffer; int in_width, in_height, out_width, out_height; //here, make sure inbuffer points to the input BGR32 data, //and the input and output dimensions are set correctly. //calculate the bytes needed for the output image int nbytes = avpicture_get_size(PIX_FMT_YUV420P, out_width, out_height); //create buffer for the output image uint8_t* outbuffer = (uint8_t*)av_malloc(nbytes); //create ffmpeg frame structures. These do not allocate space for image data, //just the pointers and other information about the image.

AVFrame* inpic = avcodec_alloc_frame(); AVFrame* outpic = avcodec_alloc_frame(); //this will set the pointers in the frame structures to the right points in //the input and output buffers. Avpicture_fill((AVPicture*)inpic, inbuffer, PIX_FMT_BGR32, in_width, in_height); avpicture_fill((AVPicture*)outpic, outbuffer, PIX_FMT_YUV420P, out_width, out_height); //create the conversion context SwsContext* fooContext = sws_getContext(in_width, in_height, PIX_FMT_BGR32, out_width, out_height, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL); //perform the conversion sws_scale(fooContext, inpic->data, inpic->linesize, 0, in_height, outpic->data, outpic->linesize); //encode the frame here... //free memory av_free(outbuffer); av_free(inpic); av_free(outpic); Of course, if you are going to be converting a sequence of frames, just make your allocations once at the beginning and deallocations once at the end.

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