[FFmpeg-user] A/V sync issues & more with MediaPortal recording of ClearQAM

[Mr M]

On Sun, Feb 9, 2014 at 6:38 PM, Mr M <redpenguinmail at gmail.com> wrote:

>
>
>
> On Thu, Feb 6, 2014 at 3:40 PM, Mr M <redpenguinmail at gmail.com> wrote:
>
>>
>>
>> On Thursday, February 6, 2014, Mr M <redpenguinmail at gmail.com> wrote:
>>
>>>
>>>
>>> On Thursday, February 6, 2014, Carl Eugen Hoyos <cehoyos at ag.or.at>
>>> wrote:
>>>
>>>> Mr M <redpenguinmail <at> gmail.com> writes:
>>>>
>>>> > > Audio streams are switching between silent and
>>>> > > non-silent, and I have no idea how (and if) this
>>>> > > is signaled.
>>>>
>>>> > Well I can definitely tell you one thing. The second
>>>> > audio track (spa) is definitely silent even on the TV
>>>> > as I hear nothing when switching to it.
>>>>
>>>> The transport stream contains three audio tracks (0x40,
>>>> 0x41 and 0x42), actual audio switches between two of them.
>>>> Is your tv really never silent while playing this program?
>>>>
>>>> Carl Eugen
>>>>
>>>> _______________________________________________
>>>> ffmpeg-user mailing list
>>>> ffmpeg-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>>
>>>
>>> I just took a look again and during programming and commercials
>>> then back again it never went silent.
>>>
>>>
>>> --
>>> Sent from Gmail Mobile
>>>
>>
>> Recordings from MSNBC are claiming only 2 audio streams now. Maybe
>> sonething was broken when I was recording last Sunday.
>>
>
>
> Just an update to this:
>
> I have recorded another show today from this channel, but to be safe I
> used another PC with another tuner card just to make sure that the PC or
> tuner was not the culprit.
>
> ffmpeg shows:
>
> Input #0, mpegts, from 'Caught on Camera (Twist of Fate -
> 105)_MSNBC_2014-02-09_17-00.ts':
>   Duration: 01:09:58.60, start: 0.071600, bitrate: 4000 kb/s
>
>   Program 137
>     Stream #0:0[0x40](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000
> Hz, stereo, fltp, 192 kb/s
>     Stream #0:1[0x41](spa): Audio: ac3 ([129][0][0][0] / 0x0081), 0
> channels, fltp
>     Stream #0:2[0x30]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
> yuv420p(tv), 704x480 [SAR 10:11 DAR 4:3], max. 4295 kb/s, 29.97 fps, 29.97
> tbr, 90k tbn, 59.9
> At least one output file must be specified
>
> So one of the audio tracks is gone yet it still looses A/V sync over time.
>
> So it appears to be something with the the cableco signal.
>
> I also spoke with the MediaPortal folks and they stated they do not alter
> the signal/stream in anyway when it's recording. I also do not have any
> commerical skipping programs or anything of that nature in use.
>

Another update to this. Apparently it was the fault of the cableco
themselves. For a month or so now at least, recordings have never
experienced this exact same error even though I never touched my setup.

It appears from talking to a cable tech that they were not 100% done
messing with the setup during this MSNBC issue and even 8 months later are
still messing here and there with equipment.