Live webm segmenter overflow

[pathammer]

System info

Operating System: Ubuntu 14.04 arm32hf and 16.04 amd64
Shaka Packager Version: 1e2da22 & v1.5.0

Issue and steps to reproduce the problem

I'm packaging live VP8 video being passed into packager over RTP. After about 68,800 frames, packager stops with the message segmenter.cc(427)] Error adding sample to segment: segment too large, 1.84467e+10 seconds. I definitely have not generated a 584 year long segment.
Could this be related to #214 ?

Packager Command:

"input=/tmp/5000webm.pipe,stream=video,init_segment=$OUT_DIR/init.webm,segment_template=$OUT_DIR/live-video-hd$Number$.webm,bandwidth=3000000" --profile live --mpd_output $OUT_DIR/camera.mpd --single_segment=0 -segment_duration 2 -minimum_update_period 2

Details:

What is the expected result? Package the live video until the source stops producing video.

What happens instead? Packaging stops prematurely.

My input is 2592x1944 and 7.5 fps. The issue is reproducible with a real video as well as gstreamer's videotestsrc test pattern 0.

[0510/164344:INFO:demuxer.cc(58)] Initialize Demuxer for file '/tmp/5000webm.pipe'.
[0510/164349:INFO:demuxer.cc(170)] Demuxer::Run() on file '/tmp/5000webm.pipe'.
[0510/164349:WARNING:mpd_builder.cc(233)] Video info does not contain frame duration required for calculating framerate. @frameRate is required for DASH IOP.
[0510/191730:ERROR:segmenter.cc(427)] Error adding sample to segment: segment too large, 1.84467e+10 seconds.
[0510/191730:ERROR:demuxer.cc(159)] Demuxer::PushSample failed with 9 (MUXER_FAILURE): Error adding sample to segment: segment too large
[0510/191730:ERROR:packager_main.cc(501)] Packaging Error: 8 (PARSER_FAILURE): Cannot parse media file /tmp/5000webm.pipe

<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/google/shaka-packager version eab7910029-debug-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" minBufferTime="PT2S" type="dynamic" profiles="urn:mpeg:dash:profile:isoff-live:2011" publishTime="2017-05-11T02:17:30Z" availabilityStartTime="2017-05-10T23:43:58Z" minimumUpdatePeriod="PT2S" timeShiftBufferDepth="PT1800S">
  <Period id="0" start="PT0S">
    <AdaptationSet id="0" contentType="video" width="2592" height="1944" frameRate="1000000/133000" segmentAlignment="true" par="4:3">
      <Representation id="0" bandwidth="3000000" codecs="vp8" mimeType="video/webm" sar="1:1">
        <SegmentTemplate timescale="1000000" initialization="init.webm" media="live-video-hd-$Number$.webm" startNumber="3711">
          <SegmentTimeline>
            <S t="7420015000" d="2000000" r="900"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>

[kqyang]

Thanks for reporting the issue. Looks like there is an overflow somewhere. Do you have a sample content that can duplicate this issue? Or do you have a link to the content you talked about: gstreamer's videotestsrc test pattern 0?

[pathammer]

This should do it assuming you have gstreamer installed:

mkfifo /tmp/webm.pipe
# start packer first on that named-pipe
gst-launch-1.0 videotestsrc ! 'video/x-raw, format=(string)I420, width=(int)2592, height=(int)1944, framerate=(fraction)15/2' ! vp8enc ! webmmux ! filesink location=/tmp/webm.pipe

I saw the error ~2.5 hrs into that stream

[pathammer]

Also just realizing that packager returns a zero exit code when this error occurs.

[kqyang]

Thanks. We'll look into it!

[kqyang]

@pathammer The problem should be fixed. Again, thanks for reporting the problem.