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How do I use ffmpeg to merge all audio streams (in a video ...
https://stackoverflow.com/questions/45824127/how-do-i-use-ffmpeg-to-merge-all-audio-streams-in-a-video-file-into-one-audio#:~:text=The%20actual%20number%20of%20audio%20streams%20%28there%20is,to%20amerge%20those%20into%20one%20single%20audio%20channel.
How to check number of channels in my audio wav file …
https://stackoverflow.com/questions/47905083/how-to-check-number-of-channels-in-my-audio-wav-file-using-ffmpeg-command
If you have installed ffmpeg, you most likely also have ffprobe. With ffprobe, this is rather simple: ffprobe -i yourFile.mp4 -show_streams -select_streams a:0. This will give you an output like follows, from which you can already read what you need: [STREAM] index=1 codec_name=aac codec_long_name=AAC (Advanced Audio Coding) profile=LC codec ...
ffmpeg - mapping an audio file with 2 channels to a video ...
https://video.stackexchange.com/questions/18738/ffmpeg-mapping-an-audio-file-with-2-channels-to-a-video-file
Channels are conjoint tracks within a single stream, so a stereo audio WAV has one stream which contains two channels. If this is what you have, use. ffmpeg -i video -i audio -map 0:v -map 1:a output. If they are distinct streams, then the above command will still map all the streams, but for explicit specification, use.
15 Useful 'FFmpeg' Commands for Video, Audio and …
https://www.tecmint.com/ffmpeg-commands-for-video-audio-and-image-conversion-in-linux/
Get Video File Information. To get information about a file (say video.mp4), run the following …
[Qt5] play the audio decoded by ffmpeg using QAudioOutput
https://programming.vip/docs/qt5-play-the-audio-decoded-by-ffmpeg-using-qaudiooutput.html
For example, a raw audio stream with 2 channels, 48000Hz sampling rate and 8-bit unsigned shaping data type is stored as follows: Above, each grid is a sampling point of one channel. 48000Hz means 48000 sampling points for one channel in one second, and 2 * 48000 = 96000 sampling points for two channels.
FFMPEG Direct Show Audio Channels : ffmpeg
https://www.reddit.com/r/ffmpeg/comments/aj0q1z/ffmpeg_direct_show_audio_channels/
The first has only 1 channel while the second has 2. ffmpeg -f dshow -channels 1 -i audio="AUDIO DEVICE NAME 2" -f dshow -channels 2 -i audio="AUDIO DEVICE NAME 2" -b:a 192k -ar 48000 -filter_complex "[0:a]astats=metadata=1,ametadata@DEVICE 1 NICKNAME HERE=print:key=lavfi.astats.Overall.RMS_level[0a];[1:a]astats=metadata=1,ametadata@DEVICE …
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
input file 'A.avi' stream 0: video 640x360 stream 1: audio 2 channels input file 'B.mp4' stream 0: video 1920x1080 stream 1: audio 2 channels stream 2: subtitles (text) stream 3: audio 5.1 channels stream 4: subtitles (text) input file 'C.mkv' stream 0: video 1280x720 stream 1: audio 2 channels stream 2: subtitles (image)
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
Set audio sampling rate (in Hz). channels. Set the number of audio channels. flags +qscale. Enable fixed quality, VBR (Variable Bit Rate) mode. Note that VBR is implicitly enabled when the vbr value is positive. cutoff. Set cutoff frequency. If not specified (or explicitly set to 0) it will use a value automatically computed by the library ...
FFmpeg Resampler Documentation
https://ffmpeg.org/ffmpeg-resampler.html
Set the number of output channels. Default value is 0. Setting this value is not mandatory if the corresponding channel layout out_channel_layout is set. uch, used_channel_count Set the number of used input channels. Default value is 0. This option is only used for special remapping. isr, in_sample_rate Set the input sample rate.
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