Since
c977039e585bfff28ecc037ef827c6c3d1ed88aa plane count for
PIX_FMT_HWACCEL pixel formats is 0 instead of 1. The created dummy
AVBuffers are still bogus since AVFrame does not hold frame data when
AVHWAccels are used.
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
planes = av_pix_fmt_count_planes(frame->format);
+ /* workaround for AVHWAccel plane count of 0, buf[0] is used as
+ check for allocated buffers: make libavcodec happy */
+ if (desc && desc->flags & PIX_FMT_HWACCEL)
+ planes = 1;
if (!desc || planes <= 0) {
ret = AVERROR(EINVAL);
goto fail;