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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (35)
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Sur d’autres sites (6511)
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Cannot seem to work with mp3 files in pydub
14 janvier 2023, par NegativePotatoI have been trying to open mp3 files on pydub, I have ffmpeg in path and whatnot, but I get errors whenever I attempt to use pydub with mp3 files. Wav files work fine of course.
This is my code for testing purposes (copied directly from online) :


from os import path
from pydub import AudioSegment

# files 
src = "Meet.mp3"
dst = "test.wav"

# convert wav to mp3 
sound = AudioSegment.from_mp3(src)
sound.export(dst, format="wav")



And this is my output for that code :


C:\Users\aiden\OneDrive\Desktop\VietnameseAudioConnector>py test.py
Traceback (most recent call last):
 File "C:\Users\aiden\OneDrive\Desktop\VietnameseAudioConnector\test.py", line 9, in <module>
 sound = AudioSegment.from_mp3(src)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "C:\Users\aiden\AppData\Local\Programs\Python\Python311\Lib\site-packages\pydub\audio_segment.py", line 796, in from_mp3
 return cls.from_file(file, 'mp3', parameters=parameters)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "C:\Users\aiden\AppData\Local\Programs\Python\Python311\Lib\site-packages\pydub\audio_segment.py", line 773, in from_file
 raise CouldntDecodeError(
pydub.exceptions.CouldntDecodeError: Decoding failed. ffmpeg returned error code: 1

Output from ffmpeg/avlib:

ffmpeg version 2023-01-12-git-fc263f073e-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 12.2.0 (Rev7, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 57. 43.100 / 57. 43.100
 libavcodec 59. 56.100 / 59. 56.100
 libavformat 59. 35.100 / 59. 35.100
 libavdevice 59. 8.101 / 59. 8.101
 libavfilter 8. 53.100 / 8. 53.100
 libswscale 6. 8.112 / 6. 8.112
 libswresample 4. 9.100 / 4. 9.100
 libpostproc 56. 7.100 / 56. 7.100
[mp3 @ 000002d24d29e500] Failed to read frame size: Could not seek to 44209.
Meet.mp3: Invalid argument
</module>


Sorry if this ends up being obvious, I am new to using python. Thank you for the help !


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Converting `webm` to `mov` format using ffmpeg loses transparency - how can I keep it ?
10 mars 2023, par M.A ShahbaziI am trying to convert a
webm
video tomov
format without losing quality and transparency using the following command :

ffmpeg -c:v libvpx-vp9 -i input.webm ouput.mov



The video gets converted, but it loses transparency and the background of video is black.


I also tried the following command :


ffmpeg -c:v png -i input.webm output.mov



But it gives me the following error output :


libavutil 58. 3.100 / 58. 3.100
 libavcodec 60. 4.100 / 60. 4.100
 libavformat 60. 4.100 / 60. 4.100
 libavdevice 60. 2.100 / 60. 2.100
 libavfilter 9. 4.100 / 9. 4.100
 libswscale 7. 2.100 / 7. 2.100
 libswresample 4. 11.100 / 4. 11.100
 libpostproc 57. 2.100 / 57. 2.100
[png @ 0000028041ca7000] Invalid PNG signature 0x824983420031F031.
[matroska,webm @ 0000028041c91240] Could not find codec parameters for stream 0 (Video: png, none(pc, progressive), 800x800): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, matroska,webm, from 'hero.webm':
 Metadata:
 COMPATIBLE_BRANDS: qt
 creation_time : 2023-02-23T10:43:46.703800Z
 MAJOR_BRAND : qt
 MINOR_VERSION : 537199360
 ENCODER : Lavf59.35.100
 Duration: 00:00:09.00, start: 0.000000, bitrate: 1378 kb/s
 Stream #0:0: Video: png, none(pc, progressive), 800x800, SAR 1:1 DAR 1:1, 24 fps, 24 tbr, 1k tbn
 Metadata:
 alpha_mode : 1
 ENCODER : Lavc59.56.100 libvpx-vp9
 DURATION : 00:00:09.000000000
Stream mapping:
 Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[png @ 0000028041ca7680] Invalid PNG signature 0x824983420031F031.
Error while decoding stream #0:0: Invalid data found when processing input
Cannot determine format of input stream 0:0 after EOF
Error marking filters as finished
Conversion failed!



How can I maintain transparency when converting from
webm
tomov
format ?

Here's the video info in case it can be helpful :


{
 "streams": [
 {
 "index": 0,
 "codec_name": "vp9",
 "codec_long_name": "Google VP9",
 "profile": "Profile 0",
 "codec_type": "video",
 "codec_tag_string": "[0][0][0][0]",
 "codec_tag": "0x0000",
 "width": 800,
 "height": 800,
 "coded_width": 800,
 "coded_height": 800,
 "closed_captions": 0,
 "film_grain": 0,
 "has_b_frames": 0,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "1:1",
 "pix_fmt": "yuv420p",
 "level": -99,
 "color_range": "tv",
 "field_order": "progressive",
 "refs": 1,
 "r_frame_rate": "24/1",
 "avg_frame_rate": "24/1",
 "time_base": "1/1000",
 "start_pts": 0,
 "start_time": "0.000000",
 "disposition": {
 "default": 0,
 "dub": 0,
 "original": 0,
 "comment": 0,
 "lyrics": 0,
 "karaoke": 0,
 "forced": 0,
 "hearing_impaired": 0,
 "visual_impaired": 0,
 "clean_effects": 0,
 "attached_pic": 0,
 "timed_thumbnails": 0,
 "captions": 0,
 "descriptions": 0,
 "metadata": 0,
 "dependent": 0,
 "still_image": 0
 },
 "tags": {
 "alpha_mode": "1",
 "ENCODER": "Lavc59.56.100 libvpx-vp9",
 "DURATION": "00:00:09.000000000"
 }
 }
 ],
 "format": {
 "filename": ".\\hero.webm",
 "nb_streams": 1,
 "nb_programs": 0,
 "format_name": "matroska,webm",
 "format_long_name": "Matroska / WebM",
 "start_time": "0.000000",
 "duration": "9.000000",
 "size": "1550466",
 "bit_rate": "1378192",
 "probe_score": 100,
 "tags": {
 "COMPATIBLE_BRANDS": "qt ",
 "creation_time": "2023-02-23T10:43:46.703800Z",
 "MAJOR_BRAND": "qt ",
 "MINOR_VERSION": "537199360",
 "ENCODER": "Lavf59.35.100"
 }
 }
}



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Custom Segmentation Guide : How it Works & Segments to Test
13 novembre 2023, par Erin — Analytics Tips, Uncategorized