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

[Ian Barton]

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.