<div dir="ltr"><div>I faced this issue earlier, the only difference being that I added video meta-data into hardware decoder plugin (vpudec) instead of h264parse. I don't have the proper clue of the real issue, having a consumer of the output buffer downstream avoids it. Here are some results that could help<br><br></div><div>.. h264parse ! vpudec ! videoconvert ! fakesink - error<br><br>.. h264parse ! vpudec ! videoconvert ! video/-raw, format =I420 ! fakesink -the output of vpudec is NV12 format. Force video convert to avoid bypass mode - No error<br><br></div><div>.. h264patrse ! vpudec ! videorga ! fakesink - No error , videorga is hardware post process element, checks for the video meta data and copies to the output buffer, so I don't get the issue and is my default use case. I didn't investigated further.<br><br>You could give a similar try to your pipeline, though I am not sure as the the meta data is added in h264parse element. Or just try this if the same error comes<br>gst-launch-1.0 filesrc location=input.ts ! tsdemux ! h264parse ! fakesink<br><br></div><div>Then you could keep adding element..<br></div><div><br></div><div>Regards,<br></div><div>Sudip<br></div><div><br></div><div><br></div><div><br><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 24 November 2016 at 14:38, parithi [via GStreamer-devel] <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=4680857&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Sudip,
<br><br>Even I don't have any problem running this pipeline without meta data(with tag "video"). But problem arises when I add meta data with ouput buffer of h264_parse. The decoder element should copy this meta data on it's output buffer and pass it to downstream element.
<br><br>avdec_h264 is receiving all meta data. I've checked this. Problem arises when it tries to add the meta data to its output buffer. The pipeline crashes at gst_buffer_add_meta(), since the buffer passed from avdec_h264 is not in writable mode.
<br>call stack:
<br>------------------------------<wbr>--
<br>#2 gst_buffer_add_meta
<br>#3 gst_buffer_add_h264_meta
<br>#4 gst_h264_meta_transform
<br>#5 foreach_metadata
<br>#6 gst_buffer_foreach_meta
<br>#7 gst_video_decoder_finish_frame
<br>#8 gst_ffmpegviddec_frame
<br>------------------------------<wbr>----
<br>If the meta tag is "video" the frame work will do the copying, otherwise we have to retrieve it from input buffer and append it to the outut buffer.
<br>I tried both ways, but the behaviour is same.
<br><br>Please let me know if you have any suggestion to resolve this issue.
<br><br>Regards,
<br>Parithi
<br>
<br>
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