Audio Add Track
This flow element will add a new audio track to `FFmpeg Builder``.
It will find the best source track (even from ones marked as deleted by previous nodes) to create this new track.
It looks first at language (if specified), then at the number of channels, then by the original order of the tracks in the working file.
It will insert this new track at the index specified. If the index specified is greater than the number of tracks it will be added as the last track.
Source Track Selection
Allows you to specific which track to use as the source track when converting.
Automatic
FileFlows will automatically select the best track based on channels, bitrate, codec and language.
Custom
Allows you to specific exactly the track you wish to use for the source of this new track.
You can specific which track to use based on the Channels, Codec, Language and Title.
| Property | Description |
|---|---|
| Chanenls | Can use Math Operations or specific how many channels exactly |
| Codec | Can use String Operations |
| Language | Will compare the language specified using the Language Helper which compares languages based on their names and ISO codes, so 'en' will match English and eng |
| Title | Can use String Operations |
If no tracks match the given conditions, then no track will be added and output 2 will be called
Index
The index where to insert the new audio track. 0 based, so to insert the new audio track as the first track set this to 0.
Codec
The codec to use to encode the audio
Channels
The number of channels this new audio track will be.
If you specify more channels than the source, FFMPEG will automatically upmix it.
If you specify fewer channels than the source, FFMPEG will automatically down mix it.
Bitrate
Bitrate of the audio track
Automatic
This leaves the bitrate up to FFmpeg to decide and is the default option.
Same as source
This will use the same bitrate as the original audio.
Bitrate Per Channel
If the bitrate specified should be per channel.
For example if checked and bitrate is set to 100K, and there are 6 channels, then the audio bitrate will be 600K.
Sample Rate
The sample rate to use for the new audio track
Automatic
This leaves the sample rate up to FFmpeg to decide and is the default option.
Same as source
This will use the same sample rate as the original audio.
Language
Optional language code to use. It is recommended (but not mandatory) that a ISO 639-2 code be used.
Will attempt to find an audio track with this language code if not the best audio track will be used.
Filter
Specifies a custom filter to apply to this new audio track.
Example filters:
| Filter | Description |
|---|---|
volume=2.0 | Adjusts the audio volume to 200% (twice the original volume). |
volume=0.5 | Reduces the audio volume to 50% (half the original volume). |
aecho=0.8:0.88:1000:0.4 | Adds echo with 1000ms delay and 0.4 decay factor. |
acompressor=threshold=-12dB:ratio=3:attack=5:release=50 | Compresses audio by reducing the dynamic range. |
highpass=f=300 | Applies a high-pass filter that removes frequencies below 300Hz. |
lowpass=f=3000 | Applies a low-pass filter that removes frequencies above 3000Hz. |
aformat=channel_layouts=stereo | Forces the audio output to be stereo, regardless of the input's channel layout. |
| `pan=mono | c0=FL` |
afade=t=in:ss=0:d=5 | Adds a fade-in effect starting at 0 seconds, lasting 5 seconds. |
treble=g=5 | Boosts the treble (high frequencies) by 5dB. |
bass=g=-5 | Reduces the bass (low frequencies) by 5dB. |
silenceremove=start_periods=-1:start_threshold=-50dB:detection=peak | Removes silence periods from the audio. |
atempo=1.5 | Speeds up the audio by 1.5x. |
asetrate=44100 | Sets the sample rate to 44.1kHz. |
dynaudnorm | Applies dynamic audio normalization to even out volume levels. |
earwax | Simulates the "earwax" effect, which reduces high frequencies. |
Remove Title
If the source title should be removed and the track should have no title
New Title
Optional title for the newly created audio track. If left blank the source title will be used
Outputs
- Audio track added to FFmpeg Builder Model
- No suitable source audio track found to create new audio track from