Using thread_type = "FRAME" and skip_frame = "NONKEY" doesn't seem to be multi-threaded

[Yul963]

import time
import av
import av.datasets

container = av.open(
    r"E:\ori_videos\463.mp4"
)
# container.streams.video[0].codec_context.skip_frame = "NONKEY"
container.streams.video[0].codec_context.thread_type = "NONE"

start_time = time.time()
for packet in container.demux():
    for frame in packet.decode():
        pass

default_time = time.time() - start_time
container.close()

container = av.open(
    r"E:\ori_videos\463.mp4"
)

# container.streams.video[0].codec_context.skip_frame = "NONKEY"
container.streams.video[0].codec_context.thread_type = "FRAME"

start_time = time.time()
for packet in container.demux():
    for frame in packet.decode():
        pass

auto_time = time.time() - start_time
container.close()


print("Decoded with no threading in {:.2f}s.".format(default_time))
print("Decoded with frame threading in {:.2f}s.".format(auto_time))

Decoded with no threading in 94.13s.
Decoded with frame threading in 19.67s.

This works fine. But when I try to get keyframes only, there is almost no diffrence on decoding time and CPU usage.

Decoded with no threading in 10.71s.
Decoded with frame threading in 10.82s.

Is this intended? or am I using it wrong?

[WyattBlue]

"Is this intended?"

Wrong question. "Does this match the behavior of the ffmpeg C libraries?" is the correct question.

I think this "issue" is just not helpful. I'm going to mute you for 7 days because this is an issue you can solve with a chatbot.