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• Stream H264 raw data on RTSP server

  1er janvier, par Aitazaz

  I have H264 hex string data saved in a list.
The data is in correct format as it is being received, I am trying to stream it to RTSP server.

  


  I have stream the data in realtime as it is from a dashcam.

  


  The RTSP server is deployed but when I stream frames to it, the connection is created and then ends in an instant (does not last for a second)

  


  The code is mentioned below which performs this streaming task.

  


  def h264_stream_to_rtsp(data_list, rtsp_url):
    try:
        ffmpeg_command = [
            "ffmpeg", 
            "-f", "h264",
            "-i", "-",
            "-vcodec", "libx264",
            "-preset", "fast",
            "-f", "rtsp",
            "-analyzeduration", "5000000",
            "-probesize", "5000000", 
            rtsp_url  # The RTSP URL to stream to
        ]
        
        ffmpeg_process = subprocess.Popen(ffmpeg_command, stdin=subprocess.PIPE)

        for index, hex_data in enumerate(data_list):
            # print(f"Processing hex data {index + 1}/{len(data_list)}...")

            if len(hex_data) % 2 != 0:
                hex_data = '0' + hex_data  # Append a leading zero if length is odd

            binary_data = binascii.unhexlify(hex_data)

            ffmpeg_process.stdin.write(binary_data)

        ffmpeg_process.stdin.close()

        ffmpeg_process.wait()
        print("Stream completed.")

    except KeyboardInterrupt:
        print("Stopping live stream.")
    except Exception as e:
        print(f"Error: {e}")


  


  Logs from the RTSP server are mentioned below :

  


  2025/01/01 10:56:04 INF [RTSP] [conn 20.174.9.78:35474] opened
2025/01/01 10:56:04 INF [RTSP] [session 1d2bb871] created by 20.174.9.78:35474
2025/01/01 10:56:04 INF [RTSP] [session 1d2bb871] is publishing to path 'live', 1 track (H264)
2025/01/01 10:56:04 INF [RTSP] [session 1d2bb871] destroyed: torn down by 20.174.9.78:35474
2025/01/01 10:56:04 INF [RTSP] [conn 20.174.9.78:35474] closed: EOF
2025/01/01 10:56:48 INF [RTSP] [conn 20.174.9.78:54448] opened
2025/01/01 10:56:48 INF [RTSP] [session b6a95e71] created by 20.174.9.78:54448
2025/01/01 10:56:48 INF [RTSP] [session b6a95e71] is publishing to path 'live', 1 track (H264)
2025/01/01 10:56:48 INF [RTSP] [session b6a95e71] destroyed: torn down by 20.174.9.78:54448


  


  How can I stream continuously ?

  


• NumPy array of a video changes from the original after writing into the same video

  29 mars 2021, par Rashiq

  I have a video (test.mkv) that I have converted into a 4D NumPy array - (frame, height, width, color_channel). I have even managed to convert that array back into the same video (test_2.mkv) without altering anything. However, after reading this new, test_2.mkv, back into a new NumPy array, the array of the first video is different from the second video's array i.e. their hashes don't match and the numpy.array_equal() function returns false. I have tried using both python-ffmpeg and scikit-video but cannot get the arrays to match.

  


  Python-ffmpeg attempt :

  


  import ffmpeg
import numpy as np
import hashlib

file_name = 'test.mkv'

# Get video dimensions and framerate
probe = ffmpeg.probe(file_name)
video_stream = next((stream for stream in probe['streams'] if stream['codec_type'] == 'video'), None)
width = int(video_stream['width'])
height = int(video_stream['height'])
frame_rate = video_stream['avg_frame_rate']

# Read video into buffer
out, error = (
    ffmpeg
        .input(file_name, threads=120)
        .output("pipe:", format='rawvideo', pix_fmt='rgb24')
        .run(capture_stdout=True)
)

# Convert video buffer to array
video = (
    np
        .frombuffer(out, np.uint8)
        .reshape([-1, height, width, 3])
)

# Convert array to buffer
video_buffer = (
    np.ndarray
        .flatten(video)
        .tobytes()
)

# Write buffer back into a video
process = (
    ffmpeg
        .input('pipe:', format='rawvideo', s='{}x{}'.format(width, height))
        .output("test_2.mkv", r=frame_rate)
        .overwrite_output()
        .run_async(pipe_stdin=True)
)
process.communicate(input=video_buffer)

# Read the newly written video
out_2, error = (
    ffmpeg
        .input("test_2.mkv", threads=40)
        .output("pipe:", format='rawvideo', pix_fmt='rgb24')
        .run(capture_stdout=True)
)

# Convert new video into array
video_2 = (
    np
        .frombuffer(out_2, np.uint8)
        .reshape([-1, height, width, 3])
)

# Video dimesions change
print(f'{video.shape} vs {video_2.shape}') # (844, 1080, 608, 3) vs (2025, 1080, 608, 3)
print(f'{np.array_equal(video, video_2)}') # False

# Hashes don't match
print(hashlib.sha256(bytes(video_2)).digest()) # b'\x88\x00\xc8\x0ed\x84!\x01\x9e\x08 \xd0U\x9a(\x02\x0b-\xeeA\xecU\xf7\xad0xa\x9e\\\xbck\xc3'
print(hashlib.sha256(bytes(video)).digest()) # b'\x9d\xc1\x07xh\x1b\x04I\xed\x906\xe57\xba\xf3\xf1k\x08\xfa\xf1\xfaM\x9a\xcf\xa9\t8\xf0\xc9\t\xa9\xb7'


  


  Scikit-video attempt :

  


  import skvideo.io as sk
import numpy as np

video_data = sk.vread('test.mkv')

sk.vwrite('test_2_ski.mkv', video_data)

video_data_2 = sk.vread('test_2_ski.mkv')

# Dimensions match but...
print(video_data.shape) # (844, 1080, 608, 3)
print(video_data_2.shape) # (844, 1080, 608, 3)

# ...array elements don't
print(np.array_equal(video_data, video_data_2)) # False

# Hashes don't match either
print(hashlib.sha256(bytes(video_2)).digest()) # b'\x8b?]\x8epD:\xd9B\x14\xc7\xba\xect\x15G\xfaRP\xde\xad&EC\x15\xc3\x07\n{a[\x80'
print(hashlib.sha256(bytes(video)).digest()) # b'\x9d\xc1\x07xh\x1b\x04I\xed\x906\xe57\xba\xf3\xf1k\x08\xfa\xf1\xfaM\x9a\xcf\xa9\t8\xf0\xc9\t\xa9\xb7'


  


  I don't understand where I'm going wrong and both the respective documentations do not highlight how to do this particular task. Any help is appreciated. Thank you.

  


• FFMpeg with PHP-7.0 on Ubuntu

  25 octobre 2018, par Gabriel Bueno Lemes da Silva

  I have a NGINX server with PHP-7.0 and I would like to install the ffmpeg-php extension. I’ve been trying for a few days now and in many ways.

  The method that worked so far was compiling ffmpeg (https://ffmpeg.org/releases/ffmpeg-4.0.2.tar.bz2) manually, but when trying to compile ffmpeg-php (https: // sourceforge. net / projects / ffmpeg-php / files / ffmpeg-php / 0.6.0 / ffmpeg-php-0.6.0.tbz2 / download) I am encountering the following error message :

  root@zumbiserver-mercury : /php7-ffmpeg# make /bin/bash

  /root/php7-ffmpeg/libtool —mode=compile cc -I. -I/root/php7-ffmpeg
  -DPHP_ATOM_INC -I/root/php7-ffmpeg/include -I/root/php7-ffmpeg/main -I/root/php7-ffmpeg -I/usr/include/php/20151012 -I/usr/include/php/20151012/main -I/usr/include/php/20151012/TSRM -I/usr/include/php/20151012/Zend -I/usr/include/php/20151012/ext -I/usr/include/php/20151012/ext/date/lib -I/usr/local/include/libavcodec/ -I/usr/local/include/libavformat/ -I/usr/local/include/libavutil/ -I/usr/local/include/libswscale/ -I/usr/local/include/libavfilter/ -I/usr/local/include/libavdevice/ -DHAVE_CONFIG_H -g -O2 -Wall -fno-strict-aliasing -c /root/php7-ffmpeg/ffmpeg-php.c -o ffmpeg-php.lo libtool : compile : cc
  -I. -I/root/php7-ffmpeg -DPHP_ATOM_INC -I/root/php7-ffmpeg/include -I/root/php7-ffmpeg/main -I/root/php7-ffmpeg -I/usr/include/php/20151012 -I/usr/include/php/20151012/main -I/usr/include/php/20151012/TSRM -I/usr/include/php/20151012/Zend -I/usr/include/php/20151012/ext -I/usr/include/php/20151012/ext/date/lib -I/usr/local/include/libavcodec/ -I/usr/local/include/libavformat/ -I/usr/local/include/libavutil/ -I/usr/local/include/libswscale/ -I/usr/local/include/libavfilter/ -I/usr/local/include/libavdevice/ -DHAVE_CONFIG_H -g -O2 -Wall -fno-strict-aliasing -c /root/php7-ffmpeg/ffmpeg-php.c -fPIC -DPIC -o .libs/ffmpeg-php.o In
  file included from /usr/include/x86_64-linux-gnu/sys/stat.h:104:0,
  from /usr/include/php/20151012/Zend/zend_stream.h:28,
  from /usr/include/php/20151012/Zend/zend.h:41,
  from /usr/include/php/20151012/main/php.h:36,
  from /root/php7-ffmpeg/ffmpeg-php.c:40 : /usr/include/x86_64-linux-gnu/bits/stat.h:91:21 : error : field
  ‘st_atim’ has incomplete type
  struct timespec st_atim ; /* Time of last access. /
  ^ /usr/include/x86_64-linux-gnu/bits/stat.h:92:21 : error : field
  ‘st_mtim’ has incomplete type
  struct timespec st_mtim ; / Time of last modification. /
  ^ /usr/include/x86_64-linux-gnu/bits/stat.h:93:21 : error : field
  ‘st_ctim’ has incomplete type
  struct timespec st_ctim ; / Time of last status change. /
  ^ /usr/include/x86_64-linux-gnu/bits/stat.h:152:21 : error : field
  ‘st_atim’ has incomplete type
  struct timespec st_atim ; / Time of last access. /
  ^ /usr/include/x86_64-linux-gnu/bits/stat.h:153:21 : error : field
  ‘st_mtim’ has incomplete type
  struct timespec st_mtim ; / Time of last modification. /
  ^ /usr/include/x86_64-linux-gnu/bits/stat.h:154:21 : error : field
  ‘st_ctim’ has incomplete type
  struct timespec st_ctim ; / Time of last status change. /
  ^ In file included from /usr/include/php/20151012/Zend/zend_stream.h:28:0,
  from /usr/include/php/20151012/Zend/zend.h:41,
  from /usr/include/php/20151012/main/php.h:36,
  from /root/php7-ffmpeg/ffmpeg-php.c:40 : /usr/include/x86_64-linux-gnu/sys/stat.h:364:31 : error : array type has
  incomplete element type ‘struct timespec’
  const struct timespec __times[2],
  ^ /usr/include/x86_64-linux-gnu/sys/stat.h:371:54 : error : array type has
  incomplete element type ‘struct timespec’ extern int futimens (int
  __fd, const struct timespec __times[2]) __THROW ;
  ^ In file included from /usr/include/php/20151012/main/php.h:395:0,
  from /root/php7-ffmpeg/ffmpeg-php.c:40 : /usr/include/php/20151012/Zend/zend_virtual_cwd.h:218:2 : error :
  unknown type name ‘time_t’ time_t expires ;
  ^ /usr/include/php/20151012/Zend/zend_virtual_cwd.h:248:86 : error :
  unknown type name ‘time_t’ CWD_API realpath_cache_bucket
  realpath_cache_lookup(const char *path, int path_len, time_t t) ;
  ^ /root/php7-ffmpeg/ffmpeg-php.c : In function ‘zm_startup_ffmpeg’ :
  /root/php7-ffmpeg/ffmpeg-php.c:108:5 : warning : implicit declaration of
  function ‘avcodec_init’ [-Wimplicit-function-declaration]
  avcodec_init() ;
  ^ /root/php7-ffmpeg/ffmpeg-php.c:111:5 : warning : ‘av_register_all’ is deprecated [-Wdeprecated-declarations]
  av_register_all() ;
  ^ In file included from /root/php7-ffmpeg/ffmpeg-php.c:43:0 : /usr/local/include/libavformat/avformat.h:2025:6 : note : declared here
  void av_register_all(void) ;

    ^ Makefile:194: recipe for target 'ffmpeg-php.lo' failed make: *** [ffmpeg-php.lo] Error 1

  Can someone give me a light ? I do not know what else to do !