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List: gstreamer-daily
Subject: [gst-daily] questions on gst_pad_push() to send audio/video data to
From: Shenhong Wang <qch1688 () hotmail ! com>
Date: 2008-06-06 10:31:05
Message-ID: BAY134-W274B2899E36F729227E78AB2B70 () phx ! gbl
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Dear all,
Now we are writing up a media demux element. It contains one sink pad and two source \
pads (audio & video). The element is expected to contact to next stage element \
(codec) in PUSH mode. After processing data in chain() function, we call gst_pad_push \
to send the audio or video to peer pads in codec elements (H.264 video or AAC). a) \
gst_pad_push returns back with 0 which looks successfully for video data b) \
gst_pad_push always return back with -5 for audio data. Actually we use same codes \
(but names) to finish the above actions, however we got different results (o or -5). \
Would anyone of you tell me what¡¯s the difference to send out audio/video data to \
their codec? Thanks a lot!
Best Regards!
Shenhong
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<P class=EC_MsoNormal><FONT face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; \
FONT-FAMILY: Arial">Dear all,</SPAN></FONT></P> <P class=EC_MsoNormal><FONT \
face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">Now we \
are writing up a media demux element. It contains one sink pad and two source pads \
(audio & video). The element is expected to contact to next stage element (codec) \
in PUSH mode. After processing data in chain() function, we call gst_pad_push to send \
the audio or video to peer pads in codec elements (H.264 video or AAC). \
</SPAN></FONT></P> <P class=EC_MsoNormal style="MARGIN-LEFT: 18pt; TEXT-INDENT: \
-18pt"><FONT face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: \
Arial"><SPAN>a)<FONT face="Times New Roman" size=1><SPAN style="FONT: 7pt 'Times New \
Roman'"> </SPAN></FONT></SPAN></SPAN></FONT><FONT \
face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: \
Arial">gst_pad_push returns back with 0 which looks successfully for video \
data</SPAN></FONT></P> <P class=EC_MsoNormal style="MARGIN-LEFT: 18pt; TEXT-INDENT: \
-18pt"><FONT face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: \
Arial"><SPAN>b)<FONT face="Times New Roman" size=1><SPAN style="FONT: 7pt 'Times New \
Roman'"> </SPAN></FONT></SPAN></SPAN></FONT><FONT \
face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: \
Arial">gst_pad_push always return back with -5 for audio data. </SPAN></FONT></P> <P \
class=EC_MsoNormal><FONT face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; \
FONT-FAMILY: Arial">Actually we use same codes (but names) to finish the above \
actions, however we got different results (o or -5). Would anyone of you tell me \
what¡¯s the difference to send out audio/video data to their codec? Thanks a \
lot!</SPAN></FONT></P> <P class=EC_MsoNormal><FONT face=Arial size=1><SPAN lang=EN-US \
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial"> </SPAN></FONT></P> <P \
class=EC_MsoNormal><FONT face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; \
FONT-FAMILY: Arial">Best Regards!</SPAN></FONT></P> <P class=EC_MsoNormal><FONT \
face=Arial size=1><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: \
Arial">Shenhong</SPAN></FONT></P></DIV><BR> <HR>
Discover the new Windows Vista <A \
href="http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE" \
target=_blank>Learn more!</A> </BLOCKQUOTE><br /><hr />Get news, entertainment and \
everything you care about at Live.com. <a href='http://www.live.com/getstarted.aspx ' \
target='_new'>Check it out!</a></body> </html>
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