[mythtv] Re: nuvexport mpeg2cut doesn't work on dvb-t mpeg
Thomas Husemann
thomas at thusemann.dyndns.org
Mon Nov 22 16:28:18 UTC 2004
thx for the hint, but it's not the point:
tcprobe -i /data/mythtv/1020_20041121183700_20041121191300.nuv
[tcprobe] MPEG program stream (PS)
[tcprobe] summary for /data/mythtv/1020_20041121183700_20041121191300.nuv,
(*) = not default, 0 = not detected
import frame size: -g 544x576 [720x576] (*)
aspect ratio: 4:3 (*)
frame rate: -f 25.000 [25.000] frc=3
PTS=12832.3654, frame_time=40 ms, bitrate=7000 kbps
audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50 [0x2000] (*)
PTS=12832.1009, bitrate=192 kbps
-D 6 --av_fine_ms 24 (frames & ms) [0] [0]
detected (2) presentation unit(s) (SCR reset)
tcprobe -H 200 -i /data/mythtv/1020_20041121183700_20041121191300.nuv
[tcprobe] MPEG program stream (PS)
[tcprobe] summary for /data/mythtv/1020_20041121183700_20041121191300.nuv,
(*) = not default, 0 = not detected
import frame size: -g 544x576 [720x576] (*)
aspect ratio: 4:3 (*)
frame rate: -f 25.000 [25.000] frc=3
PTS=12832.3654, frame_time=40 ms, bitrate=7000 kbps
audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50 [0x2000] (*)
PTS=12832.1009, bitrate=192 kbps
-D 6 --av_fine_ms 24 (frames & ms) [0] [0]
detected (2) presentation unit(s) (SCR reset)
On Mo, 22.11.2004, 16:21, George Styles sagte:
> Just a heads up, but are you using big enough dvb sample files? when I use
> tcprobe on dvb files, it often required a scan of 100meg or more to
> actually
> find the segments it wanted.
>
> g
>
> ----- Original Message -----
> From: "Thomas Husemann" <thomas at thusemann.dyndns.org>
> To: "Development of mythtv" <mythtv-dev at mythtv.org>
> Sent: Friday, November 19, 2004 9:13 AM
> Subject: Re: [mythtv] Re: nuvexport mpeg2cut doesn't work on dvb-t mpeg
>
>
>> Hi Gavin,
>>
>> the difference between dvb-t and ivtv is the "workbench" file for
>> avidemux:
>>
>> ADMW0002 (dvb-t)
>> 01 videos
>> Name : /mnt/store/1016_20041119082000_20041119082100.nuv.idx
>> 0 segments
>> Audio codec : none
>> Audio filter : audioNormalizeMode=0 audioResampleMode=0 audioDRC=0
>> audioShift=0
>> audioDelay=0 audioFreq=48000
>> Audio conf : audioProcessMode=0 audioMP3mode=0 audioMP3bitrate=128
>>
>> ADMW0002 (ivtv)
>> 01 videos
>> Name : /data/mythtv/1020_20041119093100_20041119093300.nuv.idx
>> 1 segments
>> Start : 517
>> Size : 5029
>> Ref : 0
>> Audio codec : none
>> Audio filter : audioNormalizeMode=0 audioResampleMode=0 audioDRC=0
>> audioShift=0
>> audioDelay=0 audioFreq=48000
>> Audio conf : audioProcessMode=0 audioMP3mode=0 audioMP3bitrate=128
>>
>> ...hope that helps
>>
>> Regards
>>
>> Thomas
>>
>> Gavin Hurlbut schrieb:
>>> Thomas Husemann <thomas at thusemann.dyndns.org> wrote:
>>>
>>>>I tried to cut my recording with nuexport. The recording was produced
>>>> by
>>>>dvb-t card (AverMedia DVB-T 771). First problem was the Xvfb server. My
>>>>solution:
>>>
>>>
>>> Oh fun. :)
>>>
>>>
>>>>- ${XVFB} :13 -screen 0 640x480x8 2> /dev/null > /dev/null &
>>>>+ ${XVFB} :13 -ac -screen 0 640x480x8 2> /dev/null > /dev/null &
>>>
>>>
>>> Hmmm. Disabling access controls... I guess that's not a bad idea.
>>> I'll
>>> work
>>> that in. I also had someone else who needed to run in 24 colour mode
>>> for
>>> soem
>>> reason, so I'll likely put that in too.
>>>
>>>
>>>>mpeg2cut /mnt/store/1006_20041117101800_20041117104500.nuv "./King of
>>>>Queens -In Flagranti".mpg 2521-18637 30102-45445 45537-
>>>
>>>
>>> OK, there's the first problem. Seems that myth isn't putting in GOP
>>> frame
>>> indexes into the database for your video. Without that, we have no
>>> idea
>>> what
>>> the last frame number will be, and hence we can't cut...
>>>
>>> Soooo. Could you get me a dump of *one* show's worth of
>>> recordedmarkups
>>> database entries? You'd need to be handy with SQL, and preferrably use
>>> a
>>> short
>>> recording. Please email it to me directly.
>>>
>>>
>>>>mpeg2cut v1.6
>>>>Using mode Xvfb
>>>>Filename "/mnt/store/1006_20041117101800_20041117104500.nuv"
>>>>OutFile "./King of Queens -In Flagranti.mpg"
>>>>Last GOP index 2521-18637
>>>
>>>
>>> Baaaaad. :)
>>>
>>>
>>>>*more debug* (with set -x and stderror)
>>>
>>>
>>> Ahhh, learn something new every day.
>>>
>>>
>>>> 720 x 576 at 25000 fps
>>>> >>>Other PTS = 3208911210
>>>
>>>
>>>> could not get sync!
>>>
>>>
>>>>**error reading packet**
>>>
>>>
>>>> io error , aborting sync
>>>
>>>
>>>> end of stream...
>>>
>>>
>>> Also bad... Seems avidemux barfs on your MPEG files. It seems that
>>> maybe
>>> Myth isn't actually generating a proper MPEG2-PS file from the MPEG2-TS
>>> stream
>>> perhaps? Hard to tell so far.
>>>
>>>
>>> If it can't index, it's game over.
>>>
>>>
>>>>*tcprobe from mpegstream*
>>>
>>>
>>>>[tcprobe] MPEG program stream (PS)
>>>>[tcprobe] summary for
>>>> /mnt/store/1006_20041117101800_20041117104500.nuv,
>>>>(*) = not default, 0 = not detected
>>>>import frame size: -g 720x576 [720x576]
>>>> aspect ratio: 4:3 (*)
>>>> frame rate: -f 25.000 [25.000] frc=3
>>>> PTS=35655.2287, frame_time=40 ms, bitrate=15000
>>>> kbps
>>>> audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50
>>>> [0x2000]
>>>> (*)
>>>> PTS=35654.5690, bitrate=192 kbps
>>>> -D 16 --av_fine_ms 19 (frames & ms) [0] [0]
>>>>detected (3) presentation unit(s) (SCR reset)
>>>
>>>
>>> Hmmm. 3 presentation units? Interesting, never seen that with my ivtv
>>> generated files.
>>>
>>> I do have some test recordings to test with tonight, so I'll see if I
>>> can
>>> dig
>>> anything up.
>>>
>>> In the mean-time, it looks like mpeg2cut will not work for your
>>> recordings.
>>> Hold on a few days, I'll try to fix that. :)
>>>
>>> Ciao
>>> Gavin
>>>
>>>
>>>
>>>>Any suggestions ?
>>>
>>>
>>>>Regards
>>>
>>>
>>>>Thomas
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
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>>> mythtv-dev at mythtv.org
>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
>>
>>
>
>
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--
Thomas Husemann
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