Please ignore last sentence relating to memcpy, I chose wrong pixel format, correct pixel format is AV_PIX_FMT_UYVY422
On Fri, Apr 24, 2015 at 1:09 PM, Nisar Ahmed <nisar....@gmail.com> wrote: > I am demuxing and decoding a quicktime movie file using libav, the decoder > always produces a frame in YUV420P, this frame has to go to the DeckLink's > frame buffer which expects the format to be YUYV422. Now I need to convert > to the desired pix format for which I am using sws_scale. > > I was wondering whether is it possible to tell the decoder to decode in > YUYV422 to save an additional conversion step? if not then is sws_scale the > only option for the conversation. The conversion is happening but somehow > the resulting frame has colours inverted (is the byte order changing during > memcpy?). > > //initializing destination buffer > > ret = av_image_alloc(video_dst_data, video_dst_linesize, > > video_dec_ctx->width, video_dec_ctx-> > height, AV_PIX_FMT_YUYV422, 1); > > //initializing context > > sws = sws_getContext(video_dec_ctx->width, video_dec_ctx-> > height, video_dec_ctx->pix_fmt, video_dec_ctx->width, video_dec_ctx-> > height, > > AV_PIX_FMT_YUYV422, SWS_FAST_BILINEAR, > NULL, NULL, NULL); > > > //performing conversion, frame holds the decoded > pixels from the decoder id dvvideo > > int status = sws_scale(sws, frame->data, frame->linesize, 0, > frame->height, video_dst_data, video_dst_linesize); > > > memcpy((char*)buffer, video_dst_data[0], video_dst_linesize[0] > * video_dec_ctx->height); > > On Thu, Apr 23, 2015 at 9:04 PM, Carl Eugen Hoyos <ceho...@ag.or.at> > wrote: > >> Nisar Ahmed <nisar.med@...> writes: >> >> > Where is packed variant of planar YUV420P format, >> > I need packed version instead of planar while >> > demuxing when libav >> >> Can you explain your usecase? I don't remember >> seeing packed yvu420. >> Note that demuxing does not produce pix_fmts... >> >> Carl Eugen >> >> _______________________________________________ >> Libav-user mailing list >> Libav-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/libav-user >> > >
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