File "t07record.py", line 3, in <module>
container = av.open(':0.0', format='x11grab', options={'s':'800x600', 'i':'0:0'})
File "av/container/core.pyx", line 354, in av.container.core.open
File "av/container/core.pyx", line 131, in av.container.core.Container.cinit
File "av/format.pyx", line 90, in av.format.ContainerFormat.cinit
ValueError: no container format 'x11grab'
I am having trouble installing PyAV.
$ pip install av
Collecting av
Using cached https://files.pythonhosted.org/packages/4d/fe/170a64b51c8f10df19fd2096388e51f377dfec07f0bd2f8d25ebdce6aa50/av-8.0.1.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-4yV5M1/av/setup.py", line 9, in <module>
from shlex import quote
ImportError: cannot import name quote
----------------------------------------Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-4yV5M1/av/
copy "dummy" codecContext? I'm opening a container with av.open(file="/dev/video0", format="v4l2", mode="r", options={"video_size": "1920x1080", "framerate": "30", "input_format": "h264"}) since RPi camera and Logitech C920 can give HW accelerated H264 stream, but then I have trouble working with the Packet object to bitstream over webRTC. Any clues?
ffmpeg -i book.m4b -f ffmetadata book.metadata.txt). With pyav, I can see a data stream that has 56 'frames', but I'm uncertain how (or if) I can process that chapter info. Does anyone know if this is possible as things stand now?
$PYAV_PYTHON setup.py bdist_wheel...
if __name__ == "__main__":
fh = open('video_bytes.bin', 'rb')
codec = av.CodecContext.create('h264', 'r')
while True:
chunk = fh.read(1 << 16)
packets = codec.parse(str(chunk))
print("Parsed {} packets from {} bytes:".format(len(packets), len(chunk)))
for packet in packets:
print(' ', packet)
frames = codec.decode(packet)
for frame in frames:
print(' ', frame)chunk directly, but parse complained that chunk was not a str
packet.to_bytes()) and to a stream container
in_cont = av.open(curr_tempfile.name, mode='r')
out_cont = av.open(output_tempfile.name, mode='w')
in_stream = in_cont.streams.audio[0]
out_stream = out_cont.add_stream(
codec_name=in_stream.codec_context.codec,
rate=audio_signal.sample_rate
)
graph = Graph()
fchain = [graph.add_abuffer(sample_rate=in_stream.rate,
format=in_stream.format.name, layout=in_stream.layout.name,
channels=audio_signal.num_channels)]
for _filter in filters:
fchain.append(_filter(graph))
fchain[-2].link_to(fchain[-1])
fchain.append(graph.add("abuffersink"))
fchain[-2].link_to(fchain[-1])
graph.configure()
for ifr in in_cont.decode(in_stream):
graph.push(ifr)
ofr = graph.pull()
ofr.pts = None
for p in out_stream.encode(ofr):
out_cont.mux(p)
out_cont.close()filterscontains lambda functions of the format: lambda graph: graph.add("name_of_filter", "named_filter_arguments")
_filter in filters would be lambda graph: graph.add("tremolo", "f=15:d=.5")
I got a VideoFrame in yuvj420p and I want to convert it to OpenCV Mat which is bgr24.
<av.VideoFrame #3, pts=1920 yuvj420p 1920x1080 at 0x7f16f0aaf7c8>Currently when I run frame.to_ndarray(format='bgr24') I get deprecated pixel format used, make sure you did set range correctly. Is there a proper way to convert to prevent this warning ?
I tried :
arr = frame.to_ndarray()
mat= cv2.cvtColor(arr, cv2.COLOR_YUV2BGR_I420)But got ValueError: Conversion to numpy array with format yuvj420p is not yet supported.
I know that I can use av.logging.Capture() to catch the warning, but just wondering if there is a proper way to do the conversion ?
I'm trying to write a video containing audio using lossless codecs. I'm using "libx264rgb" for my video codec which works perfectly fine and as expected. However, I've been having trouble finding a compatible lossless audio codec.
I tried using "flac", but I got an error saying that that is an experimental feature:
> Traceback (most recent call last):
> File "/data/users/jbitton/fbsource/fbcode/buck-out/dev/gen/aml/ai_red_team/augmentations/tests/video_tests/pytorch_test#binary,link-tree/aml/ai_red_team/augmentations/tests/video_tests/pytorch_test.py", line 92, in test_compose_without_tensor
> audio_codec="flac",
> File "/data/users/jbitton/fbsource/fbcode/buck-out/dev/gen/aml/ai_red_team/augmentations/tests/video_tests/pytorch_test#binary,link-tree/torchvision/io/video.py", line 129, in write_video
> container.mux(packet)
> File "av/container/output.pyx", line 198, in av.container.output.OutputContainer.mux
> File "av/container/output.pyx", line 204, in av.container.output.OutputContainer.mux_one
> File "av/container/output.pyx", line 174, in av.container.output.OutputContainer.start_encoding
> File "av/container/core.pyx", line 180, in av.container.core.Container.err_check
> File "av/utils.pyx", line 107, in av.utils.err_check
> av.AVError: [Errno 733130664] Experimental feature: '/tmp/tmpbwvyrh3j/aug_pt_input_1.mp4' (16: mp4)Additionally, I tried using "mp4als" which is a valid audio codec in ffmpeg, however PyAV raises an error saying it is an unknown codec.
Would appreciate any advice, thanks in advance!
import av
container = av.open(rtsp_url)
video_stream = container.streams.video[0]
audio_stream = container.streams.audio[0]
out_container = av.open(some_file, mode="w", format="mpegts")
video_stream_out = out_container.add_stream(template=video_stream)
audio_stream_out = out_container.add_stream(codec_name="aac", rate=44100)
while True:
packet = next(container.demux(video_stream, audio_stream))
if packet.stream.type == 'video':
packet.stream = video_stream_out
out_container.mux(packet)
elif packet.stream.type == 'audio':
audio_frames = packet.decode()
for a_frame in audio_frames:
a_frame.pts = None # If I don't set this to None if there is a packet drop the encode function will fail...
packets = audio_stream_out.encode(a_frame) # When I do set it to None, audio will play ridiculously fast
for a_packet in packets:
a_packet.stream = audio_stream_out
out_container.mux(a_packet)
1 reply
pip3 install av --no-binary av work with the custom compiled ffmpeg? I still get this error: pkg-config returned flags we don't understand: -pthread -pthread any hints?
I want to convert m3u8 to mp4 and i would like to do conversion as well as download on same time. for download i have used http protocol of ffmpeg.
I am running this command
ffmpeg -i ultra.m3u8 -c copy -listen 1 -seekable 1 -f mp4 http://0.0.0.0:8080/test.mp4
when i trigger this url("http://0.0.0.0:8080/test.mp4"), then file start's download, but i am not able to play video.
and i get error when all chunks are read:
[hls @ 0x55da053b4100] Opening 'ultra177.ts' for reading
[tcp @ 0x55da0540f940] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da05520480] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da053ca780] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da05485f80] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da053ced40] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da054255c0] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da0540f940] Connection to tcp://0.0.0.0:8080 failed: Connection refused
[tcp @ 0x55da05435380] Connection to tcp://0.0.0.0:8080 failed: Connection refusedframe=53236 fps=7939 q=-1.0 Lsize= 476447kB time=00:29:36.30 bitrate=2197.3kbits/s speed= 265x
video:446847kB audio:28278kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.278083%
Hello, I'm new to PyAV. I've been trying to record my screen using 'x11grab' and then broadcast it to an RTMP stream, but I've been having no luck. Here's my code:
import av
if __name__ == '__main__':
x11grab = av.open(':0.0', format='x11grab', options={'s':'1280x1024', 'framerate':'60'})
output = av.open('rtmp://localhost', format='flv')
ostream = output.add_stream('libx264', framerate=60, video_size='1280x1024')
ostream.options = {}
ostream.pix_fmt = 'yuv420p'
istream = x11grab.streams.video[0]
gen = x11grab.demux(istream)
for _ in range(1000):
packet = next(gen)
packet.stream = ostream
if packet.dts is None:
continue
print(packet)
output.mux(packet)
x11grab.close()
output.close()When I run this, it just hangs, no output whatsoever. Could somebody please point me in the right direction on how I could go about making this work? Thank you!
I want to generate a video with changing resolution (e.g.: first frame should be 640x480 but the next is 320x240 or 480x640). When I naively started changing the
stream.width and stream.height I got Input picture width (xxx) is greater than stride (yyy) error during the next stream.encode() so I suppose I need to do something more. Any idea what is missing? Is it possible to do with pyav or I need to go down to the C api?
