Recording to QT format
Ian Davidson
id012c3076 at blueyonder.co.uk
Tue Dec 18 08:43:59 PST 2012
You may have noticed a few posts from me recently regarding recording to
AVI format. From my perspective, the important part of the process is
to get the information _recorded_ so that I can edit the recorded
material and write to a DVD - so it does not have to be AVI. I would be
happy with OGG or MPEG so long as I can carry the file to another
machine and edit it.
I have successfully made a recording using
gst-launch-1.0 -e v4l2src norm=PAL !
'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1'
! queue ! mux. alsasrc num-buffers=440 ! audioconvert !
'audio/x-raw,rate=44100,channels=2' ! queue ! mux. avimux name=mux !
filesink location=test.avi
- although I have not attempted to verify that the audio is in sync with
the video.
I then tried to change from AVI to QT using
gst-launch-1.0 -e v4l2src norm=PAL !
'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1'
! videoconvert ! queue ! mux. alsasrc num-buffers=440 ! audioconvert !
'audio/x-raw,rate=44100,channels=2' ! queue ! mux. qtmux name=mux !
filesink location=test.mov
- but when I play the video, I do not hear any audio.
I have inspected qtmux to verify that it can take an audio input.
(Check). So what have I done wrong to lose the audio?
Would I be better to choose OGG or MPEG? I am thinking that the
multifilesink would be a useful thing to use.
I have attempted to use oggmux as in the following command
gst-launch-1.0 -e v4l2src norm=PAL !
'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1'
! videoconvert ! queue ! mux. alsasrc num-buffers=440 ! audioconvert !
'audio/x-raw,rate=44100,channels=2' ! queue ! mux. oggmux name=mux !
filesink location=test.ogg
- but it fails to link mux to the (video) queue.
Your help, as ever, is appreciated.
Ian
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Ian Davidson
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