Opus audio in WebM with negative timestamps is not supported

[Makio64]

System info

Operating System: MacOS 13.2
Shaka Packager Version: v2.6.1 - latest

Issue and steps to reproduce the problem

(1) encoded vp9 with ffmpeg 6.0, command argument bellow `

            '-crf', '35',
            '-b:v', '0',
            '-deadline', 'good',
            '-row-mt', '0',
            '-color_range', '1',
            '-c:a', 'libopus',
            '-c:v', 'libvpx-vp9',
            '-g', '30', 
            '-keyint_min', '30',
            '-r', '30',

(2) Fragment it with shaka classic command

What is the expected result?
No problem fragmenting like with ffmpeg 5.x.x

What happens instead?
Packaging Error: 8 (PARSER_FAILURE)

[0613/011030:WARNING:vp_codec_configuration_record.cc(45)] VPx video full range flag is inconsistent, 1 vs 0
[0613/011030:ERROR:representation.cc(39)] Unrecognized container type: 5
[0613/011030:ERROR:adaptation_set.cc(189)] Failed to initialize Representation.
[0613/011030:ERROR:mpd_notify_muxer_listener.cc(235)] Failed to notify MpdNotifier.
[0613/011030:ERROR:webm_cluster_parser.cc(329)] Got a block with a timecode before the previous block.
[0613/011030:ERROR:webm_cluster_parser.cc(329)] Got a block with a timecode before the previous block.
[0613/011030:ERROR:webm_cluster_parser.cc(329)] Got a block with a timecode before the previous block.
[0613/011030:ERROR:packager_main.cc(554)] Packaging Error: 8 (PARSER_FAILURE): Cannot parse media file /path/vp9_480p.webm

[amlbj136]

same here, seems ffmpeg bug?

[cosmin]

Does it repro if you use mp4 as a container instead of webm?

[vicwilliam]

Hi, I've been through this and in my case it was an issue related to the audio track in the input file having a small negative padding.
When you probe the input file you'll see the audio track negative timestamp

My way of "fixing" this is having audio encoded in a separate ouput file, and the video output file having no audio mapped.
After applying this fix my media played without any issues.
Just encode the video file with -an in ffmpeg.