Remux packets without transcoding

remux_packets.py

import av
import numpy as np


def write_packets(filename, packets, video_stream):
    container = av.open(filename, mode='w')
    stream = container.add_stream(template=video_stream)
    stream.options = {}
    for p in packets:
        if p.dts is not None: 
            container.mux(p)
    container.close()


out_filename = 'test.mp4'
container = av.open('GOPR6644.MP4')
video_stream = next(s for s in container.streams if s.type == 'video')

packets = [packet for packet in container.demux(video = 0)]
write_packets(out_filename, packets, video_stream)

container2 = av.open(out_filename, mode='r')
remuxed_packets = [packet for packet in container2.demux(video = 0)]
for p in remuxed_packets:
    print(p)