[mythtvnz] DTT scan comes up empty, Nova-T-500

[Michael Dilger]

Michael Dilger wrote:
> Can you show me how to do that for the other channels?  My frequencies 
> are different from yours...
Nm, I got it.  Found it was printed by dvbscan.   I'm getting all the 
channels now.

MythTV scan worked this time (I tried United Kingdom instead of 
Australia, that made a big difference).   It also picked up stuff that 
dvbscan missed: MaoriTV, Parliment TV, tvCentral, Radio NZ National, 
Radio NZ Concert, Freeview HD, Reserved {3,4,5,6}KS.

There is still some serious sketchiness though.   Stuff crashing.  Loads 
of error messages.  Blockiness, combing, stuttering, audio sync 
problems.   Basically all the channels are almost completely 
unwatchable.   And it takes about 6 seconds just to tune anything in, so 
there looks like no hope of flipping around quickly.

I'm using mplayer SVN-r26348-4.2.3, which I pulled from the trunk a few 
hours ago.

Here's a few notes.

TV 
ONE:666000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:270+288:320:1200
--> H264 (pid=270) AAC (pid=320) FPS 50
--> 1280x720
--> Audio sync goes off almost immediately.  Then the audio cuts in and 
out.  But not always, sometimes the audio runs ok for a while.
--> The video is very clean, but occasionally stutters.
--> I get "too many video packets in buffer".   My system is probably 
pretty heavily taxed on this stream.
--> I also get FAAD: error: Gain control not yet implemented, trying to 
resync!
--> I also get
    Error while decoding frame!
    [h264 @ 0x8758db0]B picture before any references, skipping??,?% 1 0
    [h264 @ 0x8758db0]decode_slice_header error
    [h264 @ 0x8758db0]no frame!


TV2:666000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:271+289:321:1201
--> H264 (pid=271) AAC (pid=321) FPS 50.
--> 1280x720
-->  Wow this one is coming through clean, very nice, not blocky, no 
comb effects, audio sync is fine.   Stupid program about ghosts, but 
hey, it's crystal clear.   Looks like my AthlonXP 3200+ is plenty fast 
enough to decode and display this one.

TVNZ 
6:666000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:272+293:322:1202
--> H264 (pid=271) AAC (pid=321) FPS 50.
--> 720x576
--> Lots of comb artifacts, and some blockiness.
--> More of those "B picture before any reference" errors

TVNZ 
7:666000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:273+294:323:1203
--> H264, AAC, FPS 50.
--> 720x576
--> Video stutters.  Lots of comb effects.  Quite a bit of blockiness.
--> "Unsupported LATM configuration: 16 programs/ 22 subframes, 4 
layers, allstreams: 0
--> FAAD: compressed input bitrate missing, assuming 128kbit/s!


TVNZ SPORT 
EXTRA:666000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:274+292:324:1204
--> 720x576

TV3:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:450+300:400:1300

C4:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:451+301:401:1301

...... I can do more tests later.
I'm happy to report on anything that needs reporting on.

-Mike