-1 is more correct than 0, as the position in the file is undefined.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
AVFilterBufferRef *picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
picref->video->pixel_aspect = (AVRational) {1, 1};
picref->pts = av_rescale_q(color->pts++, color->time_base, AV_TIME_BASE_Q);
- picref->pos = 0;
+ picref->pos = -1;
avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
ff_draw_rectangle(picref->data, picref->linesize,