I moved my media to a NAS and ever since, I can no longer get trailers to encode. The metadata works fine, just not trailers.
The .audio and .video files download fine, then they just disappear. Here is the part of the log that works on the trailer.
[16:36:28.721] DEBUG: Trailer downloader reports success
[16:36:28.721] DEBUG: download callback: trailer_downloaded_audio
[16:36:28.721] DEBUG: directory: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:36:28.721] DEBUG: Trailer downloader begin (alt for SSL):
[16:36:28.721] DEBUG: ---> callback exiting
[16:36:28.721] DEBUG: url:
https://r6---sn-a5meknl6.googlevideo.co ... bypass=yes[16:36:28.721] DEBUG: path: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)\
[16:36:28.724] DEBUG: host: r6---sn-a5meknl6.googlevideo.com
[16:36:28.724] DEBUG: path: /videoplayback
[16:36:40.833] DEBUG: Saved to cache: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:37:21.605] DEBUG: Trailer downloader reports success
[16:37:21.605] DEBUG: download callback: trailer_downloaded
[16:37:21.605] DEBUG: directory: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:37:21.605] DEBUG: download callback: end_of_queue
[16:37:21.608] DEBUG: ---> callback exiting
[16:37:21.643] DEBUG: Saved to cache: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:37:22.304] DEBUG: ffmpeg version N-91024-g293a6e8332 Copyright (c) 2000-2018 the FFmpeg developers
[16:37:22.304] DEBUG: built with gcc 7.3.0 (GCC)
[16:37:22.304] DEBUG: configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
[16:37:22.304] DEBUG: libavutil 56. 18.100 / 56. 18.100
[16:37:22.304] DEBUG: libavcodec 58. 19.101 / 58. 19.101
[16:37:22.304] DEBUG: libavformat 58. 13.102 / 58. 13.102
[16:37:22.304] DEBUG: libavdevice 58. 4.100 / 58. 4.100
[16:37:22.304] DEBUG: libavfilter 7. 21.100 / 7. 21.100
[16:37:22.304] DEBUG: libswscale 5. 2.100 / 5. 2.100
[16:37:22.304] DEBUG: libswresample 3. 2.100 / 3. 2.100
[16:37:22.304] DEBUG: libpostproc 55. 2.100 / 55. 2.100
[16:37:22.324] DEBUG: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '\\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)\trailer.video':
[16:37:22.324] DEBUG: Metadata:
[16:37:22.324] DEBUG: major_brand : dash
[16:37:22.324] DEBUG: minor_version : 0
[16:37:22.324] DEBUG: compatible_brands: iso6avc1mp41
[16:37:22.324] DEBUG: creation_time : 2019-12-15T19:27:53.000000Z
[16:37:22.324] DEBUG: Duration: 00:02:15.73, start: 0.000000, bitrate: 1620 kb/s
[16:37:22.324] DEBUG: Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 53 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
[16:37:22.324] DEBUG: Metadata:
[16:37:22.324] DEBUG: creation_time : 2019-12-15T19:27:53.000000Z
[16:37:22.324] DEBUG: handler_name : ISO Media file produced by Google Inc.
[16:37:22.327] DEBUG: Input #1, matroska,webm, from '\\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)\trailer.audio':
[16:37:22.327] DEBUG: Metadata:
[16:37:22.327] DEBUG: encoder : google/video-file
[16:37:22.327] DEBUG: Duration: 00:02:15.76, start: -0.007000, bitrate: 129 kb/s
[16:37:22.327] DEBUG: Stream #1:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
[16:37:22.329] DEBUG: [mp4 @ 060bc900] track 1: codec frame size is not set
[16:37:22.329] DEBUG: [mp4 @ 060bc900] opus in MP4 support is experimental, add '-strict -2' if you want to use it.
[16:37:22.329] DEBUG: Could not write header for output file #0 (incorrect codec parameters ?): Experimental feature
[16:37:22.329] DEBUG: Stream mapping:
[16:37:22.329] DEBUG: Stream #0:0 -> #0:0 (copy)
[16:37:22.329] DEBUG: Stream #1:0 -> #0:1 (copy)
[16:37:22.330] DEBUG: Last message repeated 1 times
[16:37:22.333] DEBUG:
[16:37:22.333] DEBUG:
[16:37:23.436] DEBUG: ffmpeg version N-91024-g293a6e8332 Copyright (c) 2000-2018 the FFmpeg developers
[16:37:23.436] DEBUG: built with gcc 7.3.0 (GCC)
[16:37:23.436] DEBUG: configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
[16:37:23.436] DEBUG: libavutil 56. 18.100 / 56. 18.100
[16:37:23.436] DEBUG: libavcodec 58. 19.101 / 58. 19.101
[16:37:23.436] DEBUG: libavformat 58. 13.102 / 58. 13.102
[16:37:23.436] DEBUG: libavdevice 58. 4.100 / 58. 4.100
[16:37:23.436] DEBUG: libavfilter 7. 21.100 / 7. 21.100
[16:37:23.436] DEBUG: libswscale 5. 2.100 / 5. 2.100
[16:37:23.436] DEBUG: libswresample 3. 2.100 / 3. 2.100
[16:37:23.436] DEBUG: libpostproc 55. 2.100 / 55. 2.100
[16:37:23.456] DEBUG: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '\\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)\trailer.video':
[16:37:23.456] DEBUG: Metadata:
[16:37:23.456] DEBUG: major_brand : dash
[16:37:23.456] DEBUG: minor_version : 0
[16:37:23.456] DEBUG: compatible_brands: iso6avc1mp41
[16:37:23.456] DEBUG: creation_time : 2019-12-15T19:27:53.000000Z
[16:37:23.456] DEBUG: Duration: 00:02:15.73, start: 0.000000, bitrate: 1620 kb/s
[16:37:23.456] DEBUG: Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 53 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
[16:37:23.456] DEBUG: Metadata:
[16:37:23.456] DEBUG: creation_time : 2019-12-15T19:27:53.000000Z
[16:37:23.456] DEBUG: handler_name : ISO Media file produced by Google Inc.
[16:37:23.458] DEBUG: Input #1, matroska,webm, from '\\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)\trailer.audio':
[16:37:23.458] DEBUG: Metadata:
[16:37:23.458] DEBUG: encoder : google/video-file
[16:37:23.458] DEBUG: Duration: 00:02:15.76, start: -0.007000, bitrate: 129 kb/s
[16:37:23.458] DEBUG: Stream #1:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
[16:37:23.459] DEBUG: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)\trailer.mp4: Invalid argument
[16:37:23.462] DEBUG:
[16:37:23.462] DEBUG:
[16:37:23.919] DEBUG: Saved to cache: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:37:23.980] DEBUG: ---> callback exiting
[16:41:43.192] DEBUG: Saved to cache: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:37:23.462] DEBUG:
[16:37:23.919] DEBUG: Saved to cache: \\FREENAS\emby\Animation_Movies\Red Shoes and the Seven Dwarfs (2019)
[16:37:23.980] DEBUG: ---> callback exiting