![]() ![]() ![]() Guessed Channel Layout for Input Stream #0.1 : mono Could not find codec parameters for stream 3 (Unknown: none): unknown codecĬonsider increasing the value for the 'analyzeduration' and 'probesize' options $ ffmpeg -f concat -safe 0 -i concat.txt -c copy -map 0 -timecode 00:00:00:00 -ignore_unknown concat.movįfmpeg version git-8e275a7 Copyright (c) 2000-2017 the FFmpeg developersīuilt with Apple LLVM version 7.3.0 (clang-703.0.31)Ĭonfiguration: -prefix=/usr/local/Cellar/ffmpeg/HEAD-8e275a7 -enable-shared -enable-pthreads -enable-gpl -enable-version3 -enable-hardcoded-tables -enable-avresample -cc=clang -host-cflags= -host-ldflags= -enable-libass -enable-libmp3lame -enable-libtheora -enable-libvorbis -enable-libvpx -enable-libx264 -enable-libxvid -enable-opencl -enable-openssl -disable-lzma -enable-nonfree -enable-vda I would like to pass the input tag mapping for Alternate Group and Default from input to output unchanged. And that works ok for a dual-mono setup, however I also need to concatenate movs with more than 2 audio streams. I have a work-around that stream copies the concatenated 2nd audio stream to a new mov, then re-wraps the video, audio stream 1, and the stream-copied audio stream 2 from the new mov, to a third mov. In practice, these tags hide audio streams from editing tools like Premiere, or you can only listen to 1 stream at a time in VLC (see image in link) When put through MediaInfo (on the MediaConch site), the Alternate Group and Default tags of each input video are:Īfter running through the concat demuxer the Alternate Group and Default tags of the resulting output concat.mov are: mov, with: 1 video stream, 2 mono pcm audio streams, 1 fresh NDF timecode stream. movs, each with: 1 mpeg2 video stream, 2 mono pcm audio streams, 1 NDF timecode stream. Please see linked files for complete example inputs, outputs, MediaInfo reports. The concat demuxer is changing the Alternate Group and Default tags on one of the audio streams. I am trying to do some XDCAM concatenations and I'm getting some unexpected behavior. ![]()
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