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adds bit depth change

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Leandro Moreira
2017-01-29 13:41:26 -02:00
parent b65927d550
commit 08174f4cf6
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README.md
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@@ -89,12 +89,22 @@ From `1080p` to `480p`:
## Audio sampling
From `original` to `8kHz`
From `original` to `8kHz`:
```
./s/ffmpeg -i /files/v/small_bunny_1080p_30fps.mp4 -ar 8000 /files/v/small_bunny_1080p_30fps_8khz.mp4
```
## Audio bit depth
From `original` to `8 bits`:
```
./s/ffmpeg -i /files/v/small_bunny_1080p_30fps.mp4 -sample_fmt:0:0 u8p /files/v/small_bunny_1080p_30fps_8bits.mp4 -y
```
> Technically speaking, bit depth is only meaningful when applied to pure PCM devices. Non-PCM formats, such as lossy compression systems like MP3, have bit depths that are not defined in the same sense as PCM. In lossy audio compression, where bits are allocated to other types of information, the bits actually allocated to individual samples are allowed to fluctuate within the constraints imposed by the allocation algorithm.
## Adaptive bitrate streaming
[HLS](https://tools.ietf.org/html/draft-pantos-http-live-streaming-20) streaming: