Just for testing my aspect ratio patch series ... It makes funny dv out of HDV with two channel of audio: mediainfo /dev/shm/dv.dv General Complete name : /dev/shm/dv.dv Format : DV Commercial name : DVCPRO HD File size : 322 MiB Frame rate : 25.000 FPS Recorded date : 1970-01-01 00:00:00.000 Video Format : DV Commercial name : DVCPRO HD Width : 1 440 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 25.000 FPS Standard : PAL Color space : YUV Scan type : Interlaced Scan order : Bottom Field First Compression mode : Lossy Time code of first frame : 00:00:00:00 Time code source : Subcode time code Audio #1 ID : 0 Format : PCM Format settings : Big / Signed Bit rate mode : Constant Bit rate : 768 kb/s Channel(s) : 1 channel Sampling rate : 48.0 kHz Bit depth : 16 bits Audio #2 ID : 1 Format : PCM Format settings : Big / Signed Bit rate mode : Constant Bit rate : 768 kb/s Channel(s) : 1 channel Sampling rate : 48.0 kHz Bit depth : 16 bits Audio #3 ID : 2 Format : PCM Format settings : Big / Signed Bit rate mode : Constant Bit rate : 768 kb/s Channel(s) : 1 channel Sampling rate : 48.0 kHz Bit depth : 16 bits Audio #4 ID : 3 Format : PCM Format settings : Big / Signed Bit rate mode : Constant Bit rate : 768 kb/s Channel(s) : 1 channel Sampling rate : 48.0 kHz Bit depth : 16 bits ffprobe says: ffprobe /dev/shm/dv.dv ffprobe version 4.4.4 Copyright (c) 2007-2023 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --docdir=/usr/doc/ffmpeg-4.4.4/html --mandir=/usr/man --disable-debug --enable-shared --disable-static --enable-gpl --enable-version3 --enable-avresample --arch=i586 --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libass --enable-libbluray --enable-libcdio --enable-frei0r --enable-libgsm --enable-openal --enable-libopus --enable-librtmp --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzmq --enable-libmp3lame --enable-opencl --enable-opengl --enable-libopenjpeg --disable-libpulse --enable-libsmbclient --enable-libsvtav1 --enable-libxml2 --enable-librsvg --enable-libdrm --enable-libaom --enable-libdav1d --enable-libsoxr --enable-libzimg --enable-vapoursynth libavutil 56. 70.100 / 56. 70.100 libavcodec 58.134.100 / 58.134.100 libavformat 58. 76.100 / 58. 76.100 libavdevice 58. 13.100 / 58. 13.100 libavfilter 7.110.100 / 7.110.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 9.100 / 5. 9.100 libswresample 3. 9.100 / 3. 9.100 libpostproc 55. 9.100 / 55. 9.100 [dv @ 0x886bfc0] Estimating duration from bitrate, this may be inaccurate Input #0, dv, from '/dev/shm/dv.dv': Metadata: timecode : 00:00:00:00 Duration: 00:00:23.48, start: 0.000000, bitrate: 115200 kb/s Stream #0:0: Video: dvvideo, yuv422p, 1440x1080 [SAR 4:3 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream #0:2: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream #0:3: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream #0:4: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s so, 8 streams ( four stereo pairs), only first 2 of them are real :)