-current no longer able to stream video

Somewhere along the line something in slackware64-current broke the ability to stream video from sling.com. It used to work with Firefox and Chrome but recently it doesn't work in Chrome at all and works briefly in Firefox ESR. It looks like ffmpeg may be the culprit from these Firefox errors. Just to be sure streaming works fine on my work laptop with Ubuntu and Debian.

Code:WARNING: Decoder=7f194b064c00 Decode error: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004) - virtual mozilla::MediaResult mozilla::FFmpegAudioDecoder<58>::DoDecode(mozilla::MediaRawData*, uint8_t*, int, bool*, mozilla::MediaDataDecoder::DecodedData&): FFmpeg audio error:-1094995529: file /tmp/firefox-78.6.1/dom/media/MediaDecoderStateMachine.cpp, line 3470