Following command works with ONLY input as mp4 or mkv if -acodec is set libvorbis. But fails with any other input. I would like to run this command to run parallel filters then merge to a final a audio/video or just audio in a batch script for any type of input format (aiff, m4a,flac,wav or mka)
ffmpeg -i 1.mkv -map_metadata 0 -write_id3v2 1 -f matroska -max_muxing_queue_size 400 -map 0:v? -c:v copy -map 0:s? -filter_complex "[0:a]asplit=4 [audio1][audio2][audio3][audio4];[audio1]highpass=f=48[audio1];[audio2]bandpass=f=2700[audio2];[audio3]bandpass=f=3000[audio3];[audio4]highpass=f=26[audio4];[audio1][audio2][audio3][audio4]amerge=inputs=4[x]" -map "[x]":a -ac 2 -acodec pcm_f32le -y out.mkv I get the following errors: Metadata: COMPATIBLE_BRANDS: isomiso2avc1mp41 MAJOR_BRAND : isom MINOR_VERSION : 512 ENCODER : Lavf58.12.100 Duration: 00:04:05.34, start: 0.000000, bitrate: 4645 kb/s Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc (default) Metadata: HANDLER_NAME : VideoHandler DURATION : 00:04:05.240000000 Stream #0:1: Subtitle: ass (default) Metadata: HANDLER_NAME : SubtitleHandler ENCODER : Lavc58.18.100 ssa DURATION : 00:04:05.343000000 Stream #0:2: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s (default) Metadata: ENCODER : Lavc58.18.100 pcm_f32le DURATION : 00:04:05.295000000 Stream mapping: Stream #0:2 (pcm_f32le) -> asplit (graph 0) Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (ass (ssa) -> ass (ssa)) Stream #0:2 -> #0:2 (pcm_f32le (native) -> pcm_f32le (native)) amerge (graph 0) -> Stream #0:3 (pcm_f32le) Press [q] to stop, [?] for help [Parsed_amerge_5 @ 0x7f9db1f00980] No channel layout for input 1 Last message repeated 1 times [AVFilterGraph @ 0x7f9db1e3a480] The following filters could not choose their formats: Parsed_amerge_5 Consider inserting the (a)format filter near their input or output. Error reinitializing filters! Failed to inject frame into filter network: Input/output error Error while processing the decoded data for stream #0:2 Conversion failed!
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