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1 000 000 (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
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PyDub : ffmpeg header missing
7 février 2024, par Ray SiplaoI made a simple Python program that add short pauses at the start of mp3 files


import os

from pydub import AudioSegment

AUDIO_DIR = 'C:\\Users\\Ray\\Downloads\\sentence-audio'
OUT_DIR = 'C:\\Users\\Ray\\Downloads\\out-audio'

pause = AudioSegment.silent(duration=400)

for fname in os.listdir(AUDIO_DIR):
 print(f'Processing {fname}')
 newf = os.path.join(OUT_DIR, os.path.basename(fname))
 if os.path.isfile(newf):
 print(f'{fname} exists')
 continue
 audio = AudioSegment.from_mp3(os.path.join(AUDIO_DIR, fname))
 new = pause + audio
 new.export(newf, format='mp3')
 print(f'{fname} lengthened')


While running this program, I received the below error message for a particular mp3 file


Traceback (most recent call last):
 File "C:\Users\Ray\Downloads\lengthen.py", line 16, in <module>
 audio = AudioSegment.from_mp3(os.path.join(AUDIO_DIR, fname))
 File "C:\Python39\lib\site-packages\pydub\audio_segment.py", line 796, in from_mp3
 return cls.from_file(file, 'mp3', parameters=parameters)
 File "C:\Python39\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 git-2020-04-03-52523b6 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 9.3.1 (GCC) 20200328
 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
 libavutil 56. 42.102 / 56. 42.102
 libavcodec 58. 77.101 / 58. 77.101
 libavformat 58. 42.100 / 58. 42.100
 libavdevice 58. 9.103 / 58. 9.103
 libavfilter 7. 77.101 / 7. 77.101
 libswscale 5. 6.101 / 5. 6.101
 libswresample 3. 6.100 / 3. 6.100
 libpostproc 55. 6.100 / 55. 6.100
[mp3float @ 0000016489995380] Header missing
 Last message repeated 71 times
[mp3 @ 000001648998b500] decoding for stream 0 failed
[mp3 @ 000001648998b500] Could not find codec parameters for stream 0 (Audio: mp3 (mp3float), 0 channels, fltp): unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mp3, from 'C:\Users\Ray\Downloads\sentence-audio\354.mp3':
 Duration: N/A, start: 0.000000, bitrate: N/A
 Stream #0:0: Audio: mp3, 0 channels, fltp
Stream mapping:
 Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 0000016489995800] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
...
</module>

I thought at first that the mp3 file is corrupt, thus it is unplayable. But, when I played the file in a media player, it was fine.


I don't know how to resolve this issue. Is there any workarounds ?


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How do I install ffmpeg on one EC2 Amazon Linux instance that can stream a mp4 ? [closed]
12 septembre 2020, par starpebbleGood day. How can I install ffmpeg on an EC2 amazon linux machine that can stream a mp4 ?


The goal : an ffmpeg install on EC2 Amazon Linux that can stream one mp4 to one rtmps endpoint. Then, create an integration test suite with it.


Is it just me or is ffmpeg a little crippled on EC2 Amazon Linux ?


Example :


ffmpeg -re -i input.mp4 -c:v libx264 -b:v 6000K -maxrate 6000K -pix_fmt yuv420p -s 1920x1080 -profile:v main -preset veryfast -g 120 -x264opts "nal-hrd=cbr:no-scenecut” -acodec aac -ab 160k -ar 44100 -f flv rtmps:///app/


Linux OS :


Linux version 4.14.193-113.317.amzn1.x86_64 (mockbuild@koji-pdx-corp-builder-60005) (gcc version 7.2.1 20170915 (Red Hat 7.2.1-2) (GCC)) #1 SMP Thu Sep 3 19:08:08 UTC 2020


The stackoverflow answer to similar questions fail to install a ffmpeg that can stream.


An installation script such as Install FFMPEG Library on EC2 Server fail this year.


The static downloads referenced on John Van Sickle-FFmpeg Static Builds fail to stream to IVS. I tried the i686 release, my first guess for an x86_64 instance.


The git source tree compiled binary fails to stream. Example : The tip of the tree isn't what I expected because the binary fails to recognize switches like
-preset.

I'd love to be able to explain streaming to anyone. Thanks.


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