Add support pcm_s16le audio

2023-07-15 15:05:26 +03:00
parent e48459f49d
commit 13ca991c37
12 changed files with 157 additions and 24 deletions
@@ -0,0 +1,40 @@
+## PCM
+
+**RTSP**
+
+- PayloadType=10 - L16/44100/2 - Linear PCM 16-bit big endian
+- PayloadType=11 - L16/44100/1 - Linear PCM 16-bit big endian
+
+https://en.wikipedia.org/wiki/RTP_payload_formats
+
+**Apple QuickTime**
+
+- `raw` - 16-bit data is stored in little endian format
+- `twos` - 16-bit data is stored in big endian format
+- `sowt` - 16-bit data is stored in little endian format
+- `in24` - denotes 24-bit, big endian
+- `in32` - denotes 32-bit, big endian
+- `fl32` - denotes 32-bit floating point PCM
+- `fl64` - denotes 64-bit floating point PCM
+- `alaw` - denotes A-law logarithmic PCM
+- `ulaw` - denotes mu-law logarithmic PCM
+
+https://wiki.multimedia.cx/index.php/PCM
+
+**FFmpeg RTSP**
+
+```
+pcm_s16be, 44100 Hz, stereo => 10
+pcm_s16be, 48000 Hz, stereo => 96 L16/48000/2
+pcm_s16be, 44100 Hz, mono   => 11
+
+pcm_s16le, 48000 Hz, stereo => 96 (b=AS:1536)
+pcm_s16le, 44100 Hz, stereo => 96 (b=AS:1411)
+pcm_s16le, 16000 Hz, stereo => 96 (b=AS:512)
+pcm_s16le, 8000 Hz, stereo  => 96 (b=AS:256)
+
+pcm_s16le, 48000 Hz, mono   => 96 (b=AS:768)
+pcm_s16le, 44100 Hz, mono   => 96 (b=AS:705)
+pcm_s16le, 16000 Hz, mono   => 96 (b=AS:256)
+pcm_s16le, 8000 Hz, mono    => 96 (b=AS:128)
+```