The encoder process must be spawned with the following parameters:
./clouddisplayencoder DEST_IP DEST_PORT WIDTH HEIGHT PIX_FMT [AUD_FMT SAMPLE_RATE]
WIDTH and HEIGHT are in pixels and must be even numbers, preferably multiples of 16 to enable asm optimizations in FFmpeg.
PIX_FMT must be one of:
ABGR8888Alpha Blue Green Red, 8 bits per pixelARGB8888Alpha Red Green Blue, 8 bits per pixelBGR888Blue Green Red, 8 bits per pixelBGRA8888Blue Green Red Alpha, 8 bits per pixelRGB888Red Green Blue, 8 bits per pixelRGBA8888Red Green Blue Alpha, 8 bits per pixel
AUD_FMT must be one of:
PCMF32LEPCM 32-bit floating-point little-endianPCMS16LEPCM signed 16-bit little-endian
SAMPLE_RATE is number of samples per second.
Both AUD_FMT and SAMPLE_RATE can be omitted if audio encoding is not desired.
Once the encoder is spawned, one must feed data for it via the standard in pipe using one of the commands listed bellow:
| Bytes | Format | Description |
|---|---|---|
| 0 - 3 | 'FRM\n' | Command for video frame |
| 4 - 11 | uint64_t | Capture timestamp in microseconds |
| 12 - | uint8_t | Video data |
IMPORTANT: Video data size is BYTES_PER_PIXEL * WIDTH * HEIGHT.
| Bytes | Format | Description |
|---|---|---|
| 0 - 3 | 'AUD\n' | Command for audio frame |
| 4 - 11 | uint64_t | Capture timestamp in microseconds |
| 12 - 15 | uint32_t | Number of samples |
| 16 - | uint8_t | Audio data |
IMPORTANT: Audio data is always stereo, so audio data size is BYTES_PER_SAMPLE * NUMBER_OF_SAMPLES * 2 CHANNELS.
Samples from channels are interleaved, so DATA[i] is left channel and DATA[i + 1] is right channel for i % 2.