Hello,
My customer is developing using i.MX6Q and BSP 3.10.17.
They would like to use LPCM in MPEG2-PS, and asking the spec such as bit rates, bit width and depth.
Are LPCM and MPEG2-PS supported in the BSP from the beginning?
As far as I checked, there is a table in i.MX_6_Series_Yocto_Project_Multimedia_Release_Notes.pdf.
I'm not sure this PCM means LPCM and the MPG2 includes Program Stream or not.
I also checked "audio/x-raw-int" fields by # gst-inspect in QSabreSD, however the results is not satisfaction.
# gst-inspect wavenc
SINK template: 'sink'
Availability: Always
Capabilities:
audio/x-raw-int
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
endianness: 1234
width: 32
depth: 32
signed: true
audio/x-raw-int
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
endianness: 1234
width: 24
depth: 24
signed: true
audio/x-raw-int
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
endianness: 1234
width: 16
depth: 16
signed: true
audio/x-raw-int
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
width: 8
depth: 8
signed: false
audio/x-raw-float
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
endianness: 1234
width: { 32, 64 }
# gst-inspect wavparse
audio/x-raw-int
endianness: 1234
signed: { true, false }
width: { 8, 16, 24, 32 }
depth: [ 1, 32 ]
rate: [ 1000, 192000 ]
channels: [ 1, 8 ]
# gst-inspect auparse | more
SRC template: 'src'
Availability: Sometimes
Capabilities:
audio/x-raw-int
rate: [ 1, 2147483647 ]
channels: [ 1, 2147483647 ]
endianness: { 1234, 4321 }
width: { 8, 16, 24, 32 }
depth: [ 1, 32 ]
signed: { true, false }
audio/x-raw-float
rate: [ 1, 2147483647 ]
channels: [ 1, 2147483647 ]
endianness: { 1234, 4321 }
width: { 32, 64 }
# gst-inspect osssink
Pad Templates:
SINK template: 'sink'
Availability: Always
Capabilities:
audio/x-raw-int
endianness: { 1234 }
signed: { true, false }
width: 16
depth: 16
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
audio/x-raw-int
signed: { true, false }
width: 8
depth: 8
rate: [ 1, 2147483647 ]
channels: [ 1, 2 ]
Best regards,
Nori Shinozaki
Hello, Thank you,
Yes, mpeg2dec is fine.
The trouble is demuxer(aiurdemux).
Please take a look at attached logs from gst-launch.
If LPCM format is S16BE, aiurdemux can demux video(MPEG2) and audio(LPCM) successfully.
However if it's S24BE, aiurdemux can't recognize the format type correctly.
The gst-launch log says "aiurdemux aiurdemux.c:3208:aiurdemux_parse_audio: Unknown Audio code-type=1, sub-type=8"
I checked sub-type=8 is defined as AUDIO_PCM_DVD in fsl_media_types.h
However in aiurdemux_parse_audio() in aiurdemux.c, AUDIO_PCM_DVD is not checked in case AUDIO_PCM sentence in line 3029.
Why is AUDIO_PCM_DVD not checked here?
How AUDIO_PCM_S24BE and AUDIO_PCM_DVD are distinguished?
Best regards,
Nori Shinozaki
