While trying to debug a problem using YUV420P with h264_videotoolbox, I came
across AV_PIX_FMT_VIDEOTOOLBOX in the encoder code. Depending on what I
discover here, I might be back in another thread about a YUV issue.
It appears that one can specify AV_PIX_FMT_VIDEOTOOLBOX and then provide
CVPixelBuffers in data[3]. The issue Im having is that avcodec_open2() finds
its way to vtenc_send_frame(). I don’t understand what is going on at this
level but the internally constructed AVFrame will not have anything in data[3]
and the following code in create_cv_pixel_buffer() fails on the second
av_assert0().
> if (avctx->pix_fmt == AV_PIX_FMT_VIDEOTOOLBOX) {
> av_assert0(frame->format == AV_PIX_FMT_VIDEOTOOLBOX);
>
> *cv_img = (CVPixelBufferRef)frame->data[3];
> av_assert0(*cv_img);
>
> CFRetain(*cv_img);
> return 0;
> }
Is there something that I need to do to make this work?
Thanks..
~S
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