[mythtv-users] ffmpeg Errors Transcoding mpg Radio Recordings.

[John Pilkington]

On 12/09/12 09:28, Ian Barton wrote:
> For several years I have been transcoding radio programs recorded from
> from FreeView (UK) to mp3 using ffmpeg:
>
> nice -n19 ffmpeg -i "1708_20120910122900.mpg" -y -ab 64k -ac 2 -acodec
> libmp3lame -f mp3
> "/media/recordings/mythtv/radio/BBC_Radio_7_Steptoe_and_Son_Homes Fit
> for Heroes_20120910122900.mp3"
>
> However,since upgrading my backend to Ubuntu 12.04 and Myth 0.25 I get
> the following errors:
>
> Input #0, mpegts, from '1708_20120910122900.mpg':
>    Duration: 00:31:58.94, start: 3315.007200, bitrate: 1378 kb/s
>    Program 1
>      Stream #0:0[0x6a6](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000
> Hz, stereo, s16, 160 kb/s
>      Stream #0:1[0x6ae]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:2[0x1ce9]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:3[0x1c21]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:4[0x1c22]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:5[0x1c23]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:6[0x1c24]: Unknown: none ([11][0][0][0] / 0x000B)
>      Stream #0:7[0x1c25]: Unknown: none ([11][0][0][0] / 0x000B)
> Output #0, mp3, to 'BBC_Radio_7_Steptoe_and_Son_Homes Fit for
> Heroes_20120910122900.mp3':
>    Metadata:
>      TSSE            : Lavf54.6.100
>      Stream #0:0(eng): Audio: mp3, 48000 Hz, stereo, s16, 64 kb/s
> Stream mapping:
>    Stream #0:0 -> #0:0 (mp2 -> libmp3lame)
> Press [q] to stop, [?] for help
> PES packet size mismatch31:58.10 bitrate=  64.0kbits/s
> [mp2 @ 0xa36f40] incomplete frame
> Error while decoding stream #0:0
> size=   14993kB time=00:31:59.11 bitrate=  64.0kbits/s
> video:0kB audio:14993kB global headers:0kB muxing overhead 0.001472%
>
> Has anyone else had this problem?
>
> Ian.

Is it a problem?  It looks as if it's got to EOF, but maybe it then 
doesn't complete processing.  I use mplayer -dumpaudio -dumpfile which 
has always quit like this:

TS_PARSE: COULDN'T SYNC
dump: 54699840 bytes written to 
'/mnt/f10store/myth/stripped/1704_20120911212800.mp2'.
Core dumped ;)

Exiting... (End of file)

But it plays OK.

John P