[mythtv-users] UK DVB radio and pi frontend

[John Pilkington]

On 16/05/17 11:45, Stephen Worthington wrote:
> On Tue, 16 May 2017 10:28:32 +0100, you wrote:
> 
>> On 16/05/17 10:10, John Pilkington wrote:
>>>
>>> I had no problem in playing your snippet in non-RPi master; I overwrote
>>> a short test recording, also from Radio4.  Unfortunately I don't know a
>>> supported way of re-creating a DVB-radio seektable.
>>
>> Yes I should have said I see no problem with a ubuntu frontend, for
>> example, running VDPAU using the same version (but from the mythbuntu
>> repos) so I think this is pi or openmax related (ie openmax just doesn't
>> understand the video aspect of the radio stream so it falls back to
>> something the Rpi's CPU can't cope with).
>>
>> If it's seektable related I guess it could be hard for someone else to
>> reproduce.  If I can help let me know how!
> 
> There is no video stream in the snippet you uploaded.  This is what
> mediainfo says about it:
> 
> General
> ID                                       : 4173 (0x104D)
> Complete name                            : 1704_20170515082400.ts
> Format                                   : MPEG-TS
> File size                                : 45.5 MiB
> Duration                                 : 5 min 59 s
> Overall bit rate mode                    : Variable
> Overall bit rate                         : 1 062 kb/s
> 
> Audio
> ID                                       : 1302 (0x516)
> Menu ID                                  : 1 (0x1)
> Format                                   : MPEG Audio
> Format version                           : Version 1
> Format profile                           : Layer 2
> Mode                                     : Joint stereo
> Mode extension                           : Intensity Stereo + MS
> Stereo
> Codec ID                                 : 3
> Duration                                 : 5 min 59 s
> Bit rate mode                            : Constant
> Bit rate                                 : 192 kb/s
> Channel(s)                               : 2 channels
> Sampling rate                            : 48.0 kHz
> Compression mode                         : Lossy
> Stream size                              : 8.23 MiB (18%)
> Language                                 : English
> 
> Menu
> ID                                       : 1300 (0x514)
> Menu ID                                  : 1 (0x1)
> Duration                                 : 5 min 59 s
> List                                     : 1302 (0x516) (MPEG Audio,
> English) / 7210 (0x1C2A) () / 7201 (0x1C21) () / 7270 (0x1C66) ()
> Language                                 : English
> 
> And this is what ffprobe sees:
> 
> [mpegts @ 0xc37200] PES packet size mismatch
> [mpegts @ 0xc37200] Could not find codec parameters for stream 1
> (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
> Consider increasing the value for the 'analyzeduration' and
> 'probesize' options
> [mpegts @ 0xc37200] Could not find codec parameters for stream 2
> (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
> Consider increasing the value for the 'analyzeduration' and
> 'probesize' options
> [mpegts @ 0xc37200] Could not find codec parameters for stream 3
> (Unknown: none ([5][0][0][0] / 0x0005)): unknown codec
> Consider increasing the value for the 'analyzeduration' and
> 'probesize' options
> Input #0, mpegts, from
> '/mnt/savaidh/cdrive/down/1704_20170515082400.ts':
>    Duration: 00:05:59.66, start: 42721.252856, bitrate: 1062 kb/s
>    Program 1
>      Stream #0:0[0x516](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000
> Hz, stereo, s16p, 192 kb/s
>      Stream #0:1[0x1c2a]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:2[0x1c21]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:3[0x1c66]: Unknown: none ([5][0][0][0] / 0x0005)
> Unsupported codec with id 0 for input stream 1
> Unsupported codec with id 0 for input stream 2
> Unsupported codec with id 0 for input stream 3
> 
> So it is an audio stream along with three other unknown streams in an
> MPEG TS container.  It does have the "Mode extension: Intensity Stereo
> + MS" which I have never encountered before, but I do not do audio
> files very much.  The "unknown" streams may be pictures, but they are
> not any normal sort of video stream or they would be recogised as
> such.  Since ffprobe does not recognise them, I would guess that
> MythTV will not be able to handle them either, so they should just be
> ignored.  It would be worthwhile remuxing the file with just the audio
> stream to see if it will then play OK:
> 
> ffmpeg -i 1704_20170515082400.ts -c copy -map 0:0 x.ts
> 
> Keep a copy of the original, and overwrite the file in the storage
> group with the new one.  If you want to try rebuilding the seek table
> with the new file in the storage group, this command should do it:
> 
> mythcommflag --rebuild -f 1704_20170515082400.ts

The non-audio streams are, or include, interactive video, which I 
usually have disabled;  I don't remember what problems it used to give 
me.  On a quick look it's working for me now - but I'm not on RPi.

Frontend > Setup > Video > Playback OSD > Enable interactive TV