BBC HD

BBC HD on Astra 28.2e

Sky Digital HDTV Standards are a little different to the norm. You may encounter problems getting BBC HD working with MPlayer or other Linux media players.

When using scan to create channels.conf, the correct video PID is not selected by default. Using a video PID of 0 will not work as it does on non-HD channels and can cause errors such as "NO VIDEO!" or "Video: no video" in MPlayer. Here is the current working channels.conf entry (updated 25 August 2008):

BBC HD:10847:v:0:22000:2328:2329:6940

or, more explicitly

frequency = 10847 MHz V, symbolrate = 22000, vpid = 0x0918 (decimal 2328),
apid = 0x0919 (decimal 2329), sid = 0x1b1c (decimal 6940)

An alternative audio track is apid=2330.

See here for the latest settings for HD channels at 28 degrees East: http://www.lyngsat.com/hd/28east.html.

The way in which the H.264 codec is defined in the TS stream is non-standard and a patch is required for mplayer:

[UPDATE 25th Aug 2008: is this still true??? Mplayer works fine for me without patching.]

--- mplayer/libmpdemux/video.c.ark	2007-02-25 15:31:54.000000000 +0100
+++ mplayer/libmpdemux/video.c	2007-02-25 15:39:20.000000000 +0100
@@ -81,6 +81,7 @@
     video_codec = VIDEO_OTHER;
     
 // Determine image properties:
+scan_video:
 switch(video_codec){
  case VIDEO_OTHER: {
  if((d_video->demuxer->file_format == DEMUXER_TYPE_ASF) || (d_video->demuxer->file_format == DEMUXER_TYPE_AVI)) {
@@ -250,6 +251,13 @@
    while(1){
       int i=sync_video_packet(d_video);
       if(i==0x1B3) break; // found it!
+      else if((i&~0x60) == 0x107 && i != 0x107) {
+        // Some H.264 HDTV stations, including e.g. ProSieben HD as of
+	// 2007/02/25, are misidentified as MPEG-2. This is probably what
+	// we're seeing here, let's try to fix it.
+	video_codec=VIDEO_H264;
+	goto scan_video;
+      }
       if(!i || !skip_video_packet(d_video)){
         if( mp_msg_test(MSGT_DECVIDEO,MSGL_V) )  mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
         mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_MpegNoSequHdr);

Special thanks to Bernhard Rosenkraenzer for this patch, it hasn't been accepted into the main MPlayer source tree as the maintainers do not want to support wrongly produced TS streams. The same problem exists on ProSieben HD in Germany and the above patch fixes that too.

On slower CPUs, very slow MPlayer playback of BBC HD can be fixed with the command-line option -lavdopts skiploopfilter=all. Also possibly add :threads=N option for multi-core CPUs.

Kaffeine scans, tunes and plays BBC HD without modification, see that page for more details.