[mythtv-users] recording of Quest (UK) causes 0.23 to segfault

[John Pilkington]

On 27/04/10 20:52, John Pilkington wrote:
> On 27/04/10 20:15, Richard Morton wrote:
>> I rarely watch Quest in the UK (freeview - rowridge).
>>
>> However; I recorded a couple of programmes from a series and they
>> cause mythfrontend to segfault. I still have the sample file. I didnt
>> try to watch this programme live; but I have now tried the channel and
>> it works on both live tv and recorded.
>>
>> I can play the file in vlc.
>>
>> any ideas?
>>

<logging output snipped>


>
>
> I have no problem with Quest, but it's unusual among the channels that I
> do record in having no second audio channel. Not using VDPAU,
> 0.23-fixes-24158
>
> John P

I've just looked at Project-X logs for Quest (1038) and BBC FOUR (1009)
These extracts show what are probably typical differences and may be 
helpful.  The max GOP figures are very different, and, of course, the 
'video basics'

  cat 1009* | grep 'GOP summary'
-> GOP summary: min. 18, max. 36 fields; contains interlaced frames
-> GOP summary: min. 18, max. 36 fields; contains interlaced frames
-> GOP summary: min. 18, max. 36 fields; contains interlaced frames
-> GOP summary: min. 18, max. 36 fields; contains interlaced frames
-> GOP summary: min. 18, max. 36 fields; contains interlaced frames

-> Filetype is TS (generic PES Container)
-> demux
-> Service ID 0x1
-> PMT 0x2BE refers to these usable streams:
Video:
PID: 0xC9(#1)
Audio:
PID: 0x191(#2)(eng)
PID: 0x192(#6)(eng)
Teletext:
n/a
Subpict.:
PID: 0x259(#5)(eng_0x10_p1_a1 )

-> special PIDs for searching defined: { 0xC9 0x191 }
!> missing sync. byte @ 310097612
!> found sync. byte @ 310097728
ok> PID 0x191 has PES-ID 0xC0 (MPEG Audio) (310154316 #302)
ok> PID 0xC9 has PES-ID 0xE0 (MPEG Video) (310225944 #683)
-> cut-in @ GOP# 4 / new vframe 0 / new Timecode 00:00:00.000 (312548684)
-> video basics: 720*576 @ 25fps @ 0.7031 (16:9) @ 15000000bps, 
vbvBuffer 112
-> starting export of video data @ GOP# 4
!> dropping useless B-Frames @ GOP# 4 / new Timecode 00:00:00.000
-> cut-out @ GOP# 3601 (1726804440)
packs: 6946614 100% 2067132380

-> Video: fr/ ct/ 1p/ cg/ og/ dg -> 43462/ 826/ 0/ 3597/ 0/ 0
-> Video length: 43462 frames @ 00:28:58.480
-> GOP summary: min. 18, max. 36 fields; contains interlaced frames
-> avg. nom. bitrate 4450571bps (min/max: 1408400/7805600)
-> set first sequenceheader bitrate to 7805600bps



  and in contrast

  cat 1038* | grep 'GOP summary'
-> GOP summary: min. 18, max. 106 fields; contains interlaced frames
-> GOP summary: min. 18, max. 106 fields; contains interlaced frames
-> GOP summary: min. 16, max. 104 fields; contains interlaced frames
-> GOP summary: min. 14, max. 104 fields; contains interlaced frames
-> GOP summary: min. 18, max. 104 fields; contains interlaced frames
-> GOP summary: min. 18, max. 100 fields; contains interlaced frames
-> GOP summary: min. 18, max. 104 fields; contains interlaced frames
-> GOP summary: min. 18, max. 104 fields; contains interlaced frames
-> GOP summary: min. 18, max. 106 fields; contains interlaced frames

-> Filetype is TS (generic PES Container)
-> demux
-> Service ID 0x1
-> PMT 0x109 refers to these usable streams:
Video:
PID: 0x1B11(#5)
Audio:
PID: 0x1B12(eng)(#143)
Teletext:
n/a
Subpict.:
n/a

-> special PIDs for searching defined: { 0x1B11 0x1B12 }
!> missing sync. byte @ 92791044
!> found sync. byte @ 92791160
ok> PID 0x1B11 has PES-ID 0xE0 (MPEG Video) (92792664 #9)
ok> PID 0x1B12 has PES-ID 0xC0 (MPEG Audio) (92830076 #208)
-> cut-in @ GOP# 9 / new vframe 0 / new Timecode 00:00:00.000 (95069908)
-> video basics: 544*576 @ 25fps @ 0.7031 (16:9) @ 15000000bps, 
vbvBuffer 112
-> starting export of video data @ GOP# 9
!> dropping useless B-Frames @ GOP# 9 / new Timecode 00:00:00.000
-> cut-out @ GOP# 500 (227269252)
-> cut-in @ GOP# 783 / new vframe 13834 / new Timecode 00:09:13.360 
(304850836)
!> PTS difference of 27032400 (00:05:00.360) to last exported GOP detected
!> dropping useless B-Frames @ GOP# 783 / new Timecode 00:09:13.360
-> cut-out @ GOP# 1456 (541363860)
packs: 3248840 100% 710612740

-> Video: fr/ ct/ 1p/ cg/ og/ dg -> 33485/ 389/ 0/ 1164/ 0/ 0
-> Video length: 33485 frames @ 00:22:19.400
-> GOP summary: min. 18, max. 102 fields; contains interlaced frames
-> avg. nom. bitrate 1972214bps (min/max: 439200/5972000)
-> set first sequenceheader bitrate to 5972000bps