//Some devices don't output B-frames for main profile, even if requested.
vtctx->has_b_frames = CFBooleanGetValue(has_b_frames_cfbool);
CFRelease(has_b_frames_cfbool);
//Some devices don't output B-frames for main profile, even if requested.
vtctx->has_b_frames = CFBooleanGetValue(has_b_frames_cfbool);
CFRelease(has_b_frames_cfbool);