Wav Agent outputs the following when I drag the same file in, so the data has to be in the file somewhere, and I just don't know how to look for it. WavAgent: StartTC: 13:09:21:18 Now FFMpeg with the following arguments creates the following : ffprobe -i "_Audio Test_CRO_01.wav" -print_format json -show_streams -show_format ffprobe version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2007-2018 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 / 57.107.100 libavformat 57. 83.100 / 57. 83.100 libavdevice 57. 10.100 / 57. 10.100 libavfilter 6.107.100 / 6.107.100 libavresample 3. 7. 0 / 3. 7. 0 libswscale 4. 8.100 / 4. 8.100 libswresample 2. 9.100 / 2. 9.100 libpostproc 54. 7.100 / 54. 7.100 { Input #0, wav, from '_Audio Test_CRO_01.wav': Metadata: encoded_by : Pro Tools originator_reference: JTFyPBDM2GpaaaGk date : 2018-02-01 creation_time : 13:28:24 time_reference : 2273356800 Duration: 00:00:48.22, bitrate: 1197 kb/s Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s "streams": [ { "index": 0, "codec_name": "pcm_s24le", "codec_long_name": "PCM signed 24-bit little-endian", "codec_type": "audio", "codec_time_base": "1/48000", "codec_tag_string": "[1][0][0][0]", "codec_tag": "0x0001", "sample_fmt": "s32", "sample_rate": "48000", "channels": 1, "bits_per_sample": 24, "r_frame_rate": "0/0", "avg_frame_rate": "0/0", "time_base": "1/48000", "duration_ts": 2314530, "duration": "48.219375", "bit_rate": "1152000", "bits_per_raw_sample": "24", "disposition": { "default": 0, "dub": 0, "original": 0, "comment": 0, "lyrics": 0, "karaoke": 0, "forced": 0, "hearing_impaired": 0, "visual_impaired": 0, "clean_effects": 0, "attached_pic": 0, "timed_thumbnails": 0 } } ], "format": { "filename": "_Audio Test_CRO_01.wav", "nb_streams": 1, "nb_programs": 0, "format_name": "wav", "format_long_name": "WAV / WAVE (Waveform Audio)", "duration": "48.219375", "size": "7215254", "bit_rate": "1197071", "probe_score": 99, "tags": { "encoded_by": "Pro Tools", "originator_reference": "JTFyPBDM2GpaaaGk", "date": "2018-02-01", "creation_time": "13:28:24", "time_reference": "2273356800" } } } Is time_reference a clue? I have calculated that from Jan 1 1970, but that's not accurate. I'd like to know how I can get the start frame of timecode from this wav file.