Hi all, I am still in the process of porting a driver to v4l2 framework. This device is capable of decoding MPEG-1 and MPEG-2 streams. See http://dxr3.sourceforge.net/about.html for more details. So I have programmed this: static int vidioc_enum_fmt_vid_out(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) { if (fmt->index > 0) return -EINVAL; fmt->flags = V4L2_FMT_FLAG_COMPRESSED; fmt->pixelformat = V4L2_PIX_FMT_MPEG; strlcpy(fmt->description, "MPEG 1/2", sizeof(fmt->description)); return 0; } There is nothing in struct v4l2_format which indicates MPEG1, MPEG2 or MPEG4. As a result of this, it is not possible to return -EINVAL if somebody wants to decode/playback MPEG4 content. Any ideas how to achieve it? Thanks -- Christian Gmeiner, MSc -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html