The new plex pass beta that inludes the updated ffmpeg version seems to introduce this bug. Any music transcodes to OGG introduce silence into the transcoded file. The playback with stutter. Downgrading my server to a public build resolved the problem for now.
A good write up on the issue by someone else was posted on reddit a few weeks ago. Here’s there log:
<SessionReport version="2" startTime="0" startTimestamp="Oct 02, 2025 00:37:30.514" key="/library/metadata/129791" session="XXX" transcode="dba0efa1-d0ee-4f6e-832f-a3064aa072f8-249143">
<User id="1" thumb="https://plex.tv/users/XXX" title="XXX" />
<Player address="XXX" device="Android" machineIdentifier="XXX" platform="Generic" platformVersion="16" product="Plexamp" remotePublicAddress="XXX" title="Android" version="4.12.4" local="0" relayed="0" secure="0" userID="1" />
<Variants> <Variant id="3218838a-ad9e-47af-95b8-7ef064994f2d" targetBitrate="128" context="streaming" sourceAudioCodec="flac" audioDecision="transcode" protocol="http" container="ogg" audioCodec="opus" audioChannels="2" transcodeHwRequested="1" transcodeHwFullPipeline="0">
<Media hasVoiceActivity="0" id="119393" audioChannels="2" audioCodec="opus" bitrate="121" container="ogg" duration="105733" selected="1">
<Part accessible="1" deepAnalysisVersion="6" exists="1" hasThumbnail="1" id="142985" requiredBandwidths="1040,1040,1040,1040,1040,1040,1040,1040" bitrate="121" container="ogg" duration="105733" decision="transcode" selected="1">
<Stream albumGain="-12.75" albumPeak="0.999939" albumRange="3.367442" bitrate="121" bitrateMode="cbr" channels="2" codec="opus" displayTitle="FLAC (Stereo)" extendedDisplayTitle="FLAC (Stereo)" gain="-12.75" id="229490" loudness="-6.28" lra="2.46" peak="0.988556" requiredBandwidths="1034,1034,1034,1034,1034,1034,1034,1034" selected="1" streamType="2" decision="transcode" location="direct" /> </Part> </Media> </Variant> </Variants> <SegmentList><FileVariant size="15213" variant="3218838a-ad9e-47af-95b8-7ef064994f2d" /> </File>
<Timelines> <Transcode startTime="91" endTime="100" complete="1" fileType="av" variant="3218838a-ad9e-47af-95b8-7ef064994f2d" /> </Timelines> </Segment> <Segment duration="1000" startOffset="9000" endOffset="10000"> <File name="chunk-00009" type="av">
<FileVariant size="0" variant="3218838a-ad9e-47af-95b8-7ef064994f2d" /> </File> <Timelines>
<Transcode startTime="100" endTime="110" complete="1" fileType="av" variant="3218838a-ad9e-47af-95b8-7ef064994f2d" /> </Timelines> </Segment> <Segment duration="1000" startOffset="10000" endOffset="11000"> <File name="chunk-00010" type="av"> <FileVariant size="0" variant="3218838a-ad9e-47af-95b8-7ef064994f2d" /> </File>`
