mythmusic cannot play .wav files

[Boleslaw Ciesielski <bolek-mythtv@…>]

mythmusic does not seem to play common PCM .wav files (as ripped from a CD for instance). I tracked it down to this code in avfDecoder::initialize():

    // Determine the output format
    // Given we are outputing to a sound card, this will always
    // be a PCM format
    fmt = guess_format("audio_device", NULL, NULL);
    if (!fmt)
        return FALSE;

It seems that there is no output format registered with the name "audio_device", so guess_format() returns NULL and we get the early return.

The attached hack patch "fixes" it for me, although it most certainly is not the right solution.

This may be related or duplicate of #4285.

[Boleslaw Ciesielski <bolek-mythtv@…>]

This may affect all files that use ffmpeg decoder.

[paulh]

(In [15264]) Fix wav and wma playback in MythMusic.

The last ffmpeg resync [14800] changed 'audio_device' to 'oss'.

Fixes #4365 and #4285.