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Médias (3)
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The Slip - Artworks
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
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Podcasting Legal guide
16 mai 2011, par
Mis à jour : Mai 2011
Langue : English
Type : Texte
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Creativecommons informational flyer
16 mai 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
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Sur d’autres sites (9294)
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No sound when running ffmpeg on youtube live
28 mai 2020, par BartonsenDespite my limited knowledge in ffmpeg, I've managed to livestream my birdbox camera to youtube using ffmpeg running on a raspberry pi. The camera has also audio and by using local vlc in windows with rtsp, the audio is ok.



However, on youtube there is no sound (same rtsp command as used locally in windows), and I see this "warning" in youtube studio : "The current bitrate (0) of the audio stream is lower than the recommended bitrate. We recommend using a 128 Kbps bitrate for the audio stream."



How can I get the sound through youtube ?
This is the command I run. The command was found on the net, and I adopted it for my usage, and got video working straight away :



pi@raspberrypi:~ $ ffmpeg -f lavfi -i anullsrc -thread_queue_size 512 -rtsp_transport udp -i "rtsp://10.x.x.x:554/user=user&password=password&channel=1&stream=0.sdp?real_stream" -tune zerolatency -vcodec libx264 -use_wallclock_as_timestamps 1 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/mykey
ffmpeg version git-2020-05-01-3c740f2 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
 configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree
 libavutil 56. 43.100 / 56. 43.100
 libavcodec 58. 82.100 / 58. 82.100
 libavformat 58. 42.102 / 58. 42.102
 libavdevice 58. 9.103 / 58. 9.103
 libavfilter 7. 80.100 / 7. 80.100
 libswscale 5. 6.101 / 5. 6.101
 libswresample 3. 6.100 / 3. 6.100
 libpostproc 55. 6.100 / 55. 6.100
Input #0, lavfi, from 'anullsrc':
 Duration: N/A, start: 0.000000, bitrate: 705 kb/s
 Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
Guessed Channel Layout for Input Stream #1.1 : mono
Input #1, rtsp, from 'rtsp://10.x.x.x:554/user=user&password=password&channel=1&stream=0.sdp?real_stream':
 Metadata:
 title : RTSP Session
 Duration: N/A, start: 0.000000, bitrate: N/A
 Stream #1:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1920x1080, 20 fps, 20 tbr, 90k tbn, 180k tbc
 Stream #1:1: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 0, only the last option '-c:v copy' will be used.
Stream mapping:
 Stream #1:0 -> #0:0 (copy)
 Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/mykey':
 Metadata:
 encoder : Lavf58.42.102
 Stream #0:0: Video: h264 (Main) ([7][0][0][0] / 0x0007), yuvj420p(pc, bt709, progressive), 1920x1080, q=2-31, 20 fps, 20 tbr, 1k tbn, 90k tbc
 Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.82.100 aac
[flv @ 0x2c43750] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly



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How to combine/concatenate videos stored in AWS S3 bucket based on title of the file name
9 juin 2020, par orangecubeI am using a service that allows me to record videos that get automatically pushed to a folder (submissions) in an S3 bucket. There are multiple videos however they need to be grouped together and concatenated so the output is one video per group.



So, basically, any tips on how I can take videos based on the title and stitch them together ?



Example :



Submissions folder will have :



a-100-2.mp4
a-200-6.mp4
b-123-5.mp4




Expected output in processed folder :



a.mp4 - (both 'a' videos get stitched together)
b.mp4 - (only 'b' gets sent over since there is only one video.)




Thanks in advance !



Edit : Some additional and detailed information below if it helps.



The files will be labeled with :
name-location-video_token-stream_token.mp4



Need help creating a script or process that will concatenate the videos using the procedure outlined below :



Processing rules (back end) :



- 

-
Check if videos have same video_token in ‘submissions folder’. If so, keep the newest one and delete old ones.
-
Take all videos in ‘submissions folder’ with same name and location in title and concatenate the videos. Save output video to a new folder in the bucket labeled as the location for the folder name. 
Output file name : 
name-location-year.mp4.







EXAMPLE :



Submissions folder :
joey-toronto-001-354.mp4



joey-toronto-001-241.mp4 - this will be deleted



joey-toronto-103-452.mp4



alex-montreal-352-232.mp4



alex-montreal-452-223.mp4



Resulting output :



Toronto folder :



Joey-toronto-2020.mp4



Montreal folder :



Alex-montreal-2020.mp4


-
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Problem playing a sound with pydub Error : pydub.exceptions.CouldntDecodeError : Decoding failed. ffmpeg returned error code : 1
28 mai 2020, par studioDKRI have a problem getting a file played in the browser with pydub. I think the function is working, but I just don't get the right file path to it, or something else is missing. Would love to get your help !



I get the pydob error message : pydub.exceptions.CouldntDecodeError : Decoding failed. ffmpeg returned error code : 1



Here is the error I get :



[2020-05-28 16:04:33,023] ERROR in app: Exception on /overview [POST]
Traceback (most recent call last):
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
 response = self.full_dispatch_request()
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
 rv = self.handle_user_exception(e)
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
 reraise(exc_type, exc_value, tb)
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
 raise value
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
 rv = self.dispatch_request()
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
 return self.view_functions[rule.endpoint](**req.view_args)
 File "/Users/Micha/Documents/GitHub/podprod/app.py", line 109, in overview
 sound = AudioSegment.from_file(filepath)
 File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pydub/audio_segment.py", line 723, in from_file
 raise CouldntDecodeError(
pydub.exceptions.CouldntDecodeError: Decoding failed. ffmpeg returned error code: 1

Output from ffmpeg/avlib:

b'ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers\n built with Apple clang version 11.0.3 (clang-1103.0.32.59)\n configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack\n libavutil 56. 31.100 / 56. 31.100\n libavcodec 58. 54.100 / 58. 54.100\n libavformat 58. 29.100 / 58. 29.100\n libavdevice 58. 8.100 / 58. 8.100\n libavfilter 7. 57.100 / 7. 57.100\n libavresample 4. 0. 0 / 4. 0. 0\n libswscale 5. 5.100 / 5. 5.100\n libswresample 3. 5.100 / 3. 5.100\n libpostproc 55. 5.100 / 55. 5.100\n/Users/Micha/documents/github/podprod/uploads/test2.wav: Invalid data found when processing input\n'




This is the Flask route with the function I am writing.



@app.route("/overview", methods=["GET", "POST"])
def overview():

 entries = []

 # Open a file
 path = app.config["FILE_UPLOADS"]

 with os.scandir(path) as dirs:
 for entry in dirs:
 entries.append(entry.name)

 if request.method == "POST":
 filename = request.form['filename']

 filepath = os.path.join(app.config["FILE_UPLOADS"], filename)

 # Play the sound
 sound = AudioSegment.from_file(filepath)
 play(sound)

 return render_template('overview.html', entries=entries)




Here is the HTML template :



{% extends 'main_template.html' %}

 {% block title %}PodProd Podcast Overview{% endblock %}

 {% block main %}

 <div class="container">

 <h1>Here is an overview of your files</h1>

 <table class="table table-striped">
 <tr>
 <th>Filename</th>
 <th>Action</th>
 </tr>
 {% for result in entries %}
 {% if ".wav" in result %}
 <tr>
 <td>{{ result }}</td>
 <td><form action="" method="POST"> <button type="submit" class="btn btn-primary" value="{{" result="result">Play</button></form>
 </td></tr>
 {% endif %}
 {% endfor %}
 </table>

 </div>

 {% endblock %}