Hello, I have a simple sound card with a stereo output. The driver works just fine when using aplay or gstreamer to play wave files. The problem occurs when I am trying to play videos through gstreamer. I use following gstremaer pipeline (just to test sound): gst-launch-0.10 filesrc location=MPEG4_MOVIE_NAME ! qtdemux name=t ! queue ! faad ! alsasink

If I make my driver with following settings: .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),

gstreamer comes back with a following message: Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstAlsaSink:alsasink0: Could not get/set settings from/on resource. Additional debug info: gstalsasink.c(519): set_hwparams (): /GstPipeline:pipeline0/GstAlsaSink:alsasink0: Unable to set hw params for playback: Invalid argument ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ...

If I make my driver with following settings: .info = (SNDRV_PCM_INFO_NONINTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), gstreamer will play sound. Of course sound will not be correct since the data is interleaved. Any idea why is this happening?

Here is the rest of the snd_pcm_hardware struct:

.formats = SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_U8, .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS, .rate_min = 8000, .rate_max = 48000, .channels_min = 1, .channels_max = 2, .period_bytes_min = 16384, .period_bytes_max = 16384*4, .periods_min = 4, .periods_max = 256, .buffer_bytes_max= 131072,

Cheers Ogi