I do something similar converting QImage to avframe. Here's how I do it.
AVFrame* pTmpPicture =alloc_picture(PIX_FMT_RGBA32, pCodecContext->width,
pCodecContext->height);
QImage image(pTmpPicture->data[0], pCodecContext->width,
pCodecContext->height, QImage::Format_ARGB32);
// populate image with your image data
AVFrame* pPicture=NULL;
img_convert((AVPicture*)pPicture, pCodecContext->pix_fmt,
(AVPicture*)pTmpPicture, PIX_FMT_RGBA32, pCodecContext->width,
pCodecContext->height);
write_video_frame(pFormat, pVideoStream)
where:
AVFrame* alloc_picture(int pixfmt, int width, int height) {
AVFrame* pPic = avcodec_alloc_frame();
int size = avpicture_get_size(pixfmt, width, height);
uint8_t* pPicBuf = (uint8_t*)malloc(size);
avpicture_fille((AVPicture*)pPic, pPicBuf, pixfmt, width, height);
return pPic;
}
bool write_video_Frame(...); // this will write pPicture from above to the
video stream with time basing, etc.
Works fine for me...hope it helps.
On Tue, Dec 23, 2008 at 1:38 PM, <[email protected]> wrote:
> Hi to everybody,
>
> I've got the following problem:
>
> I'm trying to encode a movie out of different QImages(Part of the Qt
> library). Therefore I've written this function:
>
> bool MediaSaver::write_vid_frame(uint8_t** data,int linesize)
> {
> AVPacket pkt;
> int out_size;
> if(sws_cont)//means we've got different input-output pixelformat
> {
>
>
> sws_scale(sws_cont,(uint8_t**)data,&linesize,0,codcon->height,frm->data,frm->linesize);
> }
> else
> {
> frm->data[0]=data[0];
> frm->data[1]=data[1];
> frm->data[2]=data[2];
> frm->data[3]=data[3];
> }
>
> av_init_packet(&pkt);
> pkt.stream_index= vid->index;
>
> if(cont->flags&AVFMT_RAWPICTURE)
> {
> pkt.flags|=PKT_FLAG_KEY;
> pkt.data=(uint8_t*)frm;
> pkt.size=sizeof(AVPicture);
> }
> else
> {
> out_size=avcodec_encode_video(codcon, video_outbuf,
> video_outbuf_size, frm);
> if(out_size<=0)
> return false;
> if (codcon->coded_frame->pts != AV_NOPTS_VALUE)
> pkt.pts= av_rescale_q(codcon->coded_frame->pts,
> codcon->time_base, vid->time_base);
> if(codcon->coded_frame->key_frame)
> pkt.flags |= PKT_FLAG_KEY;
> pkt.data=video_outbuf;
> pkt.size=out_size;
> }
>
> where codcon is a CodexContext* and frm is an AVFrame* wich are alloced
> proper.
> Then I call it:
>
> write_vid_frame((uint8_t**)im.bits(),im.bytesPerLine());
>
> where im is my QImage.At this point my programm crashes.
>
> All necessary initalization has been done.
>
> Greetings and have a nice christmas
>
> Alex
> _______________________________________________________________________
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