Newest 'ffmpeg' Questions - Stack Overflow

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  • Python add audio to video using opencv or other library

    21 avril, par olokelo

    I use python cv2 module to join jpg frames into video, but I can't add audio to it. Is it possible to add audio to video in python without ffmpeg?

  • Python add audio to video opencv

    21 avril, par olokelo

    I use python cv2 module to join jpg frames into video, but I can't add audio to it. Is it possible to add audio to video in python without ffmpeg? P.S. Sorry for my poor English

  • How to get duration a video - laravel

    21 avril, par S.M_Emamian

    I want to get the duration of my videos when I upload them. To do this, I upload my videos like this:

    $video = Carbon::now()->timestamp . '_' .
            $request->file('video')->getClientOriginalName();


        $request->file('video')->move(
            $this->getCorrectPathOnServerAndLocal('/assets/videos/videos'), $video
        );

    My movie is uploaded well. now I want to get the duration of this video. I'm using PHP-FFMpeg:

    composer require php-ffmpeg/php-ffmpeg

    $ffprobe = FFProbe::create(); //error
        dd("test");
        $duration = $ffprobe
            ->format($this->getCorrectPathOnServerAndLocal('/assets/videos/videos').$video) // extracts file informations
            ->get('duration');

    but I got this error:

      (2/2) ExecutableNotFoundException

Unable to load FFProbe
in FFProbeDriver.php (line 50)
at FFProbeDriver::create(array(), null)in FFProbe.php (line 207)

  • FFmpeg conversion failed with "Subtitle encoding failed" and "canvas_size is too small" [closed]

    21 avril, par Hillol Talukdar

    I'm converting video files using FFmpeg, but the process fails and shows some errors that I don't fully understand the cause of. How can I avoid the error and fix the issue? Below is the command I used and the output I received.

    FFmpeg Command:

    ffmpeg -y -hide_banner -i saf:12.VOB -map 0:3 -c:s:0 dvdsub -map 0:2 -map 0:1 -f mp4 -vcodec copy -map_metadata 0:g -acodec aac -async 1 saf:13.mp4

    ErrorMessage:

    Input #0, mpeg, from 'saf:12.VOB':
  Duration: 00:00:21.99, start: 0.280633, bitrate: 7147 kb/s
  Stream #0:0[0x1bf]: Data: dvd_nav_packet
  Stream #0:1[0x1e0]: Video: mpeg2video, yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn
    Side data:
      cpb: bitrate max/min/avg: 7816000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:2[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s
  Stream #0:3[0x20]: Subtitle: dvd_subtitle
  Stream #0:4[0x21]: Subtitle: dvd_subtitle

Stream mapping:
  Stream #0:3 -> #0:0 (dvd_subtitle (dvdsub) -> dvd_subtitle (dvdsub))
  Stream #0:2 -> #0:1 (pcm_dvd (native) -> aac (native))
  Stream #0:1 -> #0:2 (copy)

Press [q] to stop, [?] for help

Output #0, mp4, to 'saf:13.mp4':
  Metadata:
    encoder         : Lavf60.3.100
  Stream #0:0: Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x480
    Metadata:
      encoder         : Lavc60.3.100 dvdsub
  Stream #0:1: Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc60.3.100 aac
  Stream #0:2: Video: mpeg2video (mp4v / 0x7634706D), yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 90k tbn
    Side data:
      cpb: bitrate max/min/avg: 7816000/0/0 buffer size: 1835008 vbv_delay: N/A

frame=   15 fps=0.0 q=-1.0 size=       0kB time=00:00:00.73 bitrate=   0.5kbits/s speed= 212x    
frame=  577 fps=0.0 q=-1.0 size=    5120kB time=00:00:19.18 bitrate=2186.2kbits/s speed=38.1x    

[dvdsub @ 0xb400006ffb03dde0] canvas_size(0:0) is too small(719:479) for render
[sost#0:0/dvdsub @ 0xb400006feaec5730] Subtitle encoding failed
[aac @ 0xb400006ffb02f500] Qavg: 36253.348
[aac @ 0xb400006ffb02f500] 2 frames left in the queue on closing

Conversion failed!

  • ffmpeg video streaming issue

    20 avril, par Personboiii

    I am trying to embed an adb video stream into an html site with flask, and the code I have keeps on returning this same error:

    FFmpeg: [mjpeg @ 0x156631c10] Could not find codec parameters for stream 0 (Video: mjpeg, none(bt470bg/unknown/unknown)): unspecified size
FFmpeg: Consider increasing the value for the 'analyzeduration' (1000000) and 'probesize' (5000000) options
FFmpeg: Input #0, mjpeg, from 'pipe:0':
FFmpeg:   Duration: N/A, bitrate: N/A
FFmpeg:   Stream #0:0: Video: mjpeg, none(bt470bg/unknown/unknown), 25 fps, 1200k tbr, 1200k tbn
FFmpeg: Output #0, mpegts, to 'pipe:1':
FFmpeg: [out#0/mpegts @ 0x156632110] Output file does not contain any stream
FFmpeg: Error opening output file pipe:1.
FFmpeg: Error opening output files: Invalid argument

    this is my code:

    
from flask import Flask, Response
import subprocess
import json
import threading

app = Flask(__name__)

with open("data_file.json", "r") as f:
    config_data = json.load(f)

user = config_data["Users"]["Test User 1"]


def log_ffmpeg_errors(proc):
    for line in iter(proc.stderr.readline, b''):
        if line:
            print("FFmpeg:", line.decode(), end='')


def connect_device(ip, port):
    try:
        # Reconnect if device is offline
        subprocess.run(["adb", "tcpip", str(port)])
        subprocess.run(["adb", "connect", ip])
        # Check if the device is online
        devices = subprocess.check_output(["adb", "devices"]).decode()
        if "offline" in devices:
            raise Exception("Device is offline")
    except Exception as e:
        print(f"Error connecting device: {e}")


def generate_video_stream():
    adb_cmd = ["adb", "exec-out", "screenrecord", "--output-format=mjpeg"]  # Use MJPEG output
    ffmpeg_cmd = [
        "ffmpeg",
        "-f", "mjpeg",
        "-analyzeduration", "1000000", 
        "-probesize", "5000000",  
        "-i", "pipe:0", 
        "-q:v", "5",
        "-r", "10",
        "-vcodec", "mjpeg",  
        "-s", "1280x720", 
        "-f", "mpegts", 
        "pipe:1" 
    ]

    adb_proc = subprocess.Popen(adb_cmd, stdout=subprocess.PIPE)
    ffmpeg_proc = subprocess.Popen(ffmpeg_cmd, stdin=adb_proc.stdout, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    threading.Thread(target=log_ffmpeg_errors, args=(ffmpeg_proc,), daemon=True).start()

    try:
        while True:
            frame = ffmpeg_proc.stdout.read(4096)
            if not frame:
                break
            yield (b'--frame\r\n'
                   b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n')

    finally:
        adb_proc.terminate()
        ffmpeg_proc.terminate()

@app.route('/video_feed')
def video_feed():
    return Response(generate_video_stream(), mimetype='multipart/x-mixed-replace; boundary=frame')

if __name__ == "__main__":
    connect_device(user["IP"], user["port"])
    app.run(debug=True, host='0.0.0.0', port=8080)

    I also changed it so that it is adb_cmd = ["adb","exec-out","screenrecord", "-output-format=h264","-"] and the error left but now the site header just keeps on loading and the embed in the html shows nothing. (ngrok for the site page says 200 ok)

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