Re: dvb-t in Norway/NZ

Nico Sabbi wrote:
> On Friday 08 February 2008 10:14:24 Håkon Alstadheim wrote:
>   
>> The mplayer in svn has recently acquired its own version of faad2
>> to decode sound, in the norwegian/nz dvb-t format. Work is in
>> progress but there are still issues :-). Anyone who would like to
>> share experiences on that, please speak up, or else I'll just lurk
>> here. Just in case anyone is listening, here is why I felt the need
>> to post:
>>
>> As you can see below, simply tuning and decoding seems to be too
>> much for my system, even when  dumping both audio and video to dev
>> null. This same system has no trouble playing analog tv, and the
>> cpu utilization when running the command below is ~10%. "wa" in top
>> is 0.0%. I guess I'll go to the -dev list and lurk there a bit, see
>> if i see anyone who might appreciate my help in debugging.
>>
>> ---
>> ===================================================================
>> ======= Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio
>> Coding)
>>
>> Unsupported LATM configuration: 3 programs/ 7 subframes, 5 layers,
>> allstreams: 1
>> FAAD: compressed input bitrate missing, assuming 128kbit/s!
>> AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio:
>> 16000->192000) Selected audio codec: [faad] afm: faad (FAAD AAC
>> (MPEG-2/MPEG-4 Audio) decoder)
>> ===================================================================
>> ======= AO: [null] 48000Hz 2ch s16le (2 bytes per sample)
>> Starting playback...
>>
>> Unsupported LATM configuration: 3 programs/ 7 subframes, 5 layers,
>> allstreams: 1
>> FAAD: error: Maximum number of bitstream elements exceeded, trying
>> to resync!
>> VDec: vo config request - 720 x 576 (preferred colorspace: Planar
>> YV12) VDec: using Planar YV12 as output csp (no 0)
>> Movie-Aspect is 1.82:1 - prescaling to correct movie aspect.
>>     
>
> does it play audio correctly at this point?
>
>
>   
Yes, audio is (usually) fine (when using -ao alsa). The picture lags 
behind though.
>> VO: [null] 720x576 => 1048x576 Planar YV12
>> [h264 @ 0x87980b0]B picture before any references, skipping??,?% 2
>> 0 [h264 @ 0x87980b0]decode_slice_header error
>> [h264 @ 0x87980b0]B picture before any references, skipping??,?% 3
>> 0 [h264 @ 0x87980b0]decode_slice_header error
>> A:21824.7 V:21819.3 A-V:  5.391 ct: -0.088  50/ 50 23%  0% 350.7%
>> 50 0
>>
>>            ************************************************
>>            **** Your system is too SLOW to play this!  ****
>>            ************************************************

[snip]


>>     
>
> the best thing you can do is to collect a 10 minutes sample 
> with -dumpstream and upload it to incoming.
>   
I have the dump. How do I get it to incoming? ftp://ftp2.mplayerhq.hu 
wants a username/passord (other than anonymous).
I have the dump at http://alstadheim.priv.no/tmp/stream.dump. (remove 
the extra dot at the end. I'm on a puny ADSL-line, be gentle). Playing 
the dump gets me the grown-ups voice several seconds before he enters 
the room.
> I'll pipe it to mplayer and verify.
>   
Thank you very much for looking into this!
> I suspect some issue with the main audio decoding loop 
> (between ad_faad and faad itself, that decodes only 1 frame a time),
> but I have to verify it
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