Hi guys,
I am using a gstreamer modules used to grab the audio and picture from an URL based an embedded CEF (chromium) : https://github.com/centricular/gstcefsrc
With that module, i have start to make a local record using the cefsrc and cefdemux modules. What I observe is a problem out of the sound and I would like to have your opinion on what can happen.
The pipeline I use for a local recording is:
$ export GST_DEBUG = 4
$ export GST_PLUGIN_PATH = $ PWD
$ export GST_DEBUG_DUMP_DOT_DIR = $ PWD
$ gst-launch-1.0 cefsrc url = "https://soundcloud.com/platform/sama"! cefdemux name = d d.video! video / x-raw, format = BGRA, framerate = 30/1! tail! videoconvert! videorate max-rate = 3000! videoscale! x264enc tune = speed-preset zerolatency = superfast key-int-max = 60 ref = 2! mux. d.audio_0! audio / x-raw, rate = 48000! tail! audioconvert! audiorate! voaacenc bitrate = 96000! mux. matroskamux name = mux! filesink location = out-sample01.mkv
As you can see, I get an empty file:
$ ls -al sample01.mkv
-rw-rw-r-- 1 tgayet tgayet 0 Oct 25 14:03 sample01.mkv
$ file sample01.mkv
sample01.mkv: empty
$ gst-discoverer-1.0 out-cef.mkv
Analyzing sample01.mkv
Done discovering sample01.mkv
An error was encountered while discovering the file
Stream contains no data.
What I can see is that I do not get a dot file for the PLAYING state; i just get READY then PAUSE.
However, when I use another source for the sound, namely the gstreamer module audiotestsrc, what I get seems ok with sound this time:
$ export GST_DEBUG = 4
$ export GST_PLUGIN_PATH = $ PWD
$ export GST_DEBUG_DUMP_DOT_DIR = $ PWD
$ gst-launch-1.0 cefsrc url = "https://soundcloud.com/platform/sama"! cefdemux name = d d.video! video / x-raw, format = BGRA, framerate = 30/1! tail! videoconvert! videorate max-rate = 3000! videoscale! x264enc tune = speed-preset zerolatency = superfast key-int-max = 60 ref = 2! mux. audiotestsrc! audio / x-raw, rate = 48000! tail! audioconvert! audiorate! voaacenc bitrate = 96000! mux. matroskamux name = mux! filesink location = sample02.mkv
$ ls -al sample02.mkv
-rw-rw-r-- 1 tgayet tgayet 1194840 Oct 25 14:08 sample02.mkv
$ file sample02.mkv
sample02.mkv: Matroska data
$ gst-discoverer-1.0 sample02.mkv
Analyzing sample02.mkv
Done discovering sample02.mkv
Topology:
container: Matroska
audio: MPEG-4 AAC
video: H.264 (High 4: 4: 4 Profile)
Properties:
Duration: 0: 00: 04.566000001
Seekable: yes
Live: no
tags:
container format: Matroska
audio codec: MPEG-4 AAC audio
language code: in
video codec: H264
Do you have an idea what could happen? Any idea? Maybe something is wrong in my pipeline ?
Thank you in advance for your return.
Thierry
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