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• Flask send_file not sending file

  30 avril 2021, par jackmerrill

  I'm using Flask with send_file() to have people download a file off the server.

  



  My current code is as follows :

  



  @app.route('/', methods=["GET", "POST"])
def index():
    if request.method == "POST":
        link = request.form.get('Link')
        with youtube_dl.YoutubeDL(ydl_opts) as ydl:
            info_dict = ydl.extract_info(link, download=False)
            video_url = info_dict.get("url", None)
            video_id = info_dict.get("id", None)
            video_title = info_dict.get('title', None)
            ydl.download([link])
        print("sending file...")
        send_file("dl/"+video_title+".f137.mp4", as_attachment=True)
        print("file sent, deleting...")
        os.remove("dl/"+video_title+".f137.mp4")
        print("done.")
        return render_template("index.html", message="Success!")
    else:
        return render_template("index.html", message=message)


  



  The only reason I have .f137.mp4 added is because I am using AWS C9 to be my online IDE and I can't install FFMPEG to combine the audio and video on Amazon Linux. However, that is not the issue. The issue is that it is not sending the download request.

  



  Here is the console output :

  



  127.0.0.1 - - [12/Dec/2018 16:17:41] "POST / HTTP/1.1" 200 -
[youtube] 2AYgi2wsdkE: Downloading webpage
[youtube] 2AYgi2wsdkE: Downloading video info webpage
[youtube] 2AYgi2wsdkE: Downloading webpage
[youtube] 2AYgi2wsdkE: Downloading video info webpage
WARNING: You have requested multiple formats but ffmpeg or avconv are not installed. The formats won't be merged.
[download] Destination: dl/Meme Awards v244.f137.mp4
[download] 100% of 73.82MiB in 00:02
[download] Destination: dl/Meme Awards v244.f140.m4a
[download] 100% of 11.63MiB in 00:00
sending file...
file sent, deleting...
done.
127.0.0.1 - - [12/Dec/2018 16:18:03] "POST / HTTP/1.1" 200 -


  



  Any and all help is appreciated. Thanks !

  


• too long video trace file volume ?

  12 juin 2021, par david

  I have produced an XML trace file of a 20-sec video and the volume of this trace file is 8.57 Gigabyte !! the videos is encoded using this command :

  


  ffmpeg  -i  input_1080p60.mp4  -c:v  libx264 -pix_fmt yuv420p  -b:v 8000K -bufsize 8000K -minrate 8000K -maxrate 8000K -x264opts keyint=120:min-keyint=120 -preset veryfast -profile:v high out_1080p.mp4


  


  then I used the following command I changed the format in .264 because the input of JM software for producing an XML trace file is .264 :

  


  ffmpeg  -i  out_1080p.mp4  -c:v  libx264 -pix_fmt yuv420p  -b:v 8000K -bufsize 8000K -minrate 8000K -maxrate 8000K -x264opts keyint=120:min-keyint=120 -preset veryfast -profile:v high out_1080p.264


  


  after using JM using the following code :

  


  ldecod.exe -i E:\software\out_1080p.264 -o E:\software\out.yuv -xmltrace out_1080p_xml.xml


  


  it is really weird for me. because I have more than 1000 videos that I need to produce their trace files and I do not know what should I do with this size of the trace file. furthermore, I can not open a file with this volume and no software can open the file !! :((. could you please tell me what is the problem ? and how can I solve it ? do you know another way to produce this trace file ?
THanks

  


• FFmpeg watermark duration

  4 mai 2016, par user2364292

  I am developing an Android app, which will work with FFmpeg library which only applies multiple watermarks on some test.mp4 video. For that case I am using the Android java library for FFmpeg binary from that source : [http://writingminds.github.io/ffmpeg-android-java/] which is working fine for some examples, but I just can not use commands like these :

  -i /storage/emulated/0/Download/test.mp4 -vf "movie=/storage/emulated/0/Download/test.mp4 [logo]; [in][logo] overlay=W-w-10:H-h-10, fade=in:0:20 [out]" /storage/emulated/0/Download/test.mp4

  Please note these quotes after -vf flag and these [in], [logo] flags. These just throw me an errors like

  [NULL @ 0xb5bf3200] Unable to find a suitable output format for '[logo];'
  
  [logo];: Invalid argument

  and so on. The quotes in the command are also the problem which throws me an error like :

  [AVFilterGraph @ 0xb5c092c0] No such filter: 'overlay=main_w-50:main_h-50,overlay=0:0'
  
  Error initializing complex filters.
  
  Invalid argument".

  Am I even using proper library for that case ? I also want to show the watermark in specific duration of the video. For example if video is 10 seconds long, I only want watermark to be shown starting from 3rd second of the video to 7th second. I can show the overlay images like this :

  -i /storage/emulated/0/Download/test.mp4 -i /storage/emulated/0/Download/test.jpg -i /storage/emulated/0/Download/test.jpg -filter_complex overlay=main_w-50:main_h-50,overlay=0:0 -codec:a copy /storage/emulated/0/Download/test_edited.mp4

  but they’re shown for the whole video duration. Where can I set the duration start/end for the specific overlay ?

  Thank you very much !