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 <[email protected]> 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
>
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