Multimedia API encoder Restart

[Eamo]

Hi
I am using multimedia API to encode video
The encoder is initialized to work in blocking mode
I have a thread that do dequeue of capture buffers
We need to stop the encoder include clean up all buffers and start it again.
To stop pipe and clean up I do the following steps:

1. Stop command
2. join capture dequeue thread
3. Unmapped buffers
4. Request buffers 0
   I tried to send stop command but when I send stop command I can’t dequeue all capture buffers (I get EPIPE errno)
   How can I stop pipe in blocking mode so I can dequeue the buffers after?

[DaneLLL]

Hi,
The complete encoding process is demonstrated in

/usr/src/jetson_multimedia_api/samples/01_video_encode

From initialization, execution and termination. Please refer to it to develop your use-case. Not sure about detail if your use-case, but if EoS is sent to encoder, you would need to terminate the current encoding task and re-initialize a new one.

[Eamo]

Hi
I need after the encoder run to change the formats (change frame width, height etc.) the encoder setup and run it again WITHOUT closing the encoder file descriptor

[DaneLLL]

Hi,
Runtime framerate/bitrate change is supported. Please refer to the sample and check

Runtime configurable parameter string should be of the form:
"f<frame_num1>,<prop_id1><val>,<prop_id2><val>#f<frame_num1>,<prop_id1><val>,<prop_id2><val>#..."
e.g. "f20,b8000000,i1#f300,b6000000,r40/1"

Runtime resolution change is not supported. If resolution changes, please terminate the current object and re-initialize NvVideoEncoder with new resolution.

[Eamo]

I don’t need runtime resolution change, I need to change resolution and set new format without closing the file descriptor.
Today I stop streaming unmap buffers and request zero buffers and after that set the new format request new buffers the map them.

[DaneLLL]

Hi,

@Eamo

I need to change resolution and set new format without closing the file descriptor.

This is not supported. Please close current fd and re-open it.