[FFmpeg-user] ipod message when stripping audio ??

[Sean Darcy]

Using recent git, I'm stripping audio out of a vob. I get an odd message:
> [ipod @ 0x18b47e0] track 0: codec frame size is not set

Everything seems to work, but what's the ipod message about?

sean

> ffmpeg -i /mnt/dvd/VIDEO_TS/VTS_01_1.VOB -vn -c:a copy 1-My-Talk.m4a
> ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
>   built on Mar 13 2014 15:33:24 with gcc 4.8.2 (GCC) 20131212 (Red Hat 4.8.2-7)
>   configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --shlibdir=/usr/lib64 --extra-cflags='-Ofast -march=native -mtune=native -fopenmp -fomit-frame-pointer -pipe' --enable-avresample --enable-static --enable-shared --enable-gray --enable-gpl --enable-nonfree --enable-version3 --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-x11grab --enable-gray --enable-vaapi --enable-hardcoded-tables --enable-libaacplus --enable-avisynth --enable-frei0r --enable-libfdk-aac --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-zlib --disable-debug --cpu=amdfam10 --arch=x86_64 --enable-pic --enable-libopencv --enable-openssl
>   libavutil      52. 66.101 / 52. 66.101
>   libavcodec     55. 52.102 / 55. 52.102
>   libavformat    55. 34.101 / 55. 34.101
>   libavdevice    55. 11.100 / 55. 11.100
>   libavfilter     4.  3.100 /  4.  3.100
>   libavresample   1.  2.  0 /  1.  2.  0
>   libswscale      2.  5.101 /  2.  5.101
>   libswresample   0. 18.100 /  0. 18.100
>   libpostproc    52.  3.100 / 52.  3.100
> Input #0, mpeg, from '/mnt/dvd/VIDEO_TS/VTS_01_1.VOB':
>   Duration: 00:07:22.24, start: 0.280633, bitrate: 19421 kb/s
>     Stream #0:0[0x1bf]: Data: dvd_nav_packet
>     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv), 720x480 [SAR 8:9 DAR 4:3], max. 3000 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
>     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
> [ipod @ 0x18b47e0] track 0: codec frame size is not set
> Output #0, ipod, to '1-Old-Testament.m4a':
>   Metadata:
>     encoder         : Lavf55.34.101
>     Stream #0:0: Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, 192 kb/s
> Stream mapping:
>   Stream #0:2 -> #0:0 (copy)
> Press [q] to stop, [?] for help
> size=   57750kB time=00:40:51.07 bitrate= 193.0kbits/s
> video:0kB audio:57450kB subtitle:0 data:0 global headers:0kB muxing overhead 0.522630%