Hi all, doing ffmpeg -i input.avi -c:v h264 -g 30 -bf 0 -c:a aac -ac 1 test.mp4 should produce a single audio channel in the output file. Dumping the resulting mp4 file (see the important part below) I can see that channel_count is still 2. What am I misundestanding here? Thank you. Alex ..... [mp4a] size=8+102 data_reference_index = 1 channel_count = 2 sample_size = 16 sample_rate = 44100 [esds] size=12+42 [ESDescriptor] size=5+37 es_id = 2 stream_priority = 0 [DecoderConfig] size=5+23 stream_type = 5 object_type = 64 up_stream = 0 buffer_size = 0 max_bitrate = 69830 avg_bitrate = 69830 DecoderSpecificInfo = 12 08 56 e5 00
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