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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
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Sur d’autres sites (10943)
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Ffmpeg HLS conversion error on AWS Lambda - ffmpeg was killed with signal SIGSEGV
20 octobre 2023, par RtiM0I'm trying to convert video files into HLS streams on a AWS Lambda. The ffmpeg configuration I have setup works for normal (Non HLS) transcoding, but in case of HLS it throws the following error :


stderr:
frame= 341 fps= 84 q=34.0 q=32.0 q=28.0 size=N/A time=00:00:12.52 bitrate=N/A speed= 3.1x 
frame= 385 fps= 85 q=34.0 q=31.0 q=27.0 size=N/A time=00:00:13.97 bitrate=N/A speed=3.08x 
frame= 433 fps= 86 q=33.0 q=30.0 q=27.0 size=N/A time=00:00:15.55 bitrate=N/A speed=3.08x 
[hls @ 0x702c480] Cannot use rename on non file protocol, this may lead to races and temporary partial files
[hls @ 0x702c480] Opening '/tmp/stream_0.m3u8' for writing
[hls @ 0x702c480] Opening '/tmp/stream_1.m3u8' for writing
[hls @ 0x702c480] Opening '/tmp/stream_2.m3u8' for writing
[hls @ 0x702c480] Opening '/tmp/master.m3u8' for writing
ffmpeg was killed with signal SIGSEGV


And I error thrown by fluent-ffmpeg is this :


2023-03-06T10:21:44.555Z 15a0a43b-5e24-42ac-ae72-fe04f0c72a3e ERROR Invoke Error 
{
 "errorType": "Error",
 "errorMessage": "ffmpeg was killed with signal SIGSEGV",
 "stack": [
 "Error: ffmpeg was killed with signal SIGSEGV",
 " at ChildProcess.<anonymous> (/var/task/node_modules/fluent-ffmpeg/lib/processor.js:180:22)",
 " at ChildProcess.emit (node:events:513:28)",
 " at ChildProcess._handle.onexit (node:internal/child_process:291:12)"
 ]
}
</anonymous>

This is the code I run on AWS Lambda to convert video files into HLS :


export const compressToHLS = (sourcePath, outputFolder) =>
 new Promise((resolve, reject) => {
 Ffmpeg(sourcePath)
 .complexFilter([
 {
 filter: "split",
 options: "3",
 inputs: "v:0",
 outputs: ["v1", "v2", "v3"],
 },
 {
 filter: "scale",
 options: {
 w: 1280,
 h: 720,
 },
 inputs: "v1",
 outputs: "v1out",
 },
 {
 filter: "scale",
 options: {
 w: 960,
 h: 540,
 },
 inputs: "v2",
 outputs: "v2out",
 },
 {
 filter: "scale",
 options: {
 w: 640,
 h: 360,
 },
 inputs: "v3",
 outputs: "v3out",
 },
 ])
 .outputOptions([
 "-map [v1out]",
 "-c:v:0",
 "libx264",
 "-b:v 3000000",
 "-map [v2out]",
 "-c:v:1",
 "libx264",
 "-b:v 2000000",
 "-map [v3out]",
 "-c:v:2",
 "libx264",
 "-b:v 1000000",
 ])
 .outputOptions([
 "-map a:0",
 "-c:a:0 aac",
 "-b:a:0 96000",
 "-ar 48000",
 "-ac 2",
 "-map a:0",
 "-c:a:1 aac",
 "-b:a:1 96000",
 "-ar 48000",
 "-ac 2",
 "-map a:0",
 "-c:a:2 aac",
 "-b:a:2 96000",
 "-ar 48000",
 "-ac 2",
 ])
 .outputOptions([
 "-f hls",
 "-hls_time 10",
 "-hls_playlist_type vod",
 "-hls_flags independent_segments",
 "-hls_segment_type mpegts",
 `-hls_segment_filename ${outputFolder}/%v_%d.ts`,
 "-master_pl_name master.m3u8",
 ])
 .outputOption("-var_stream_map", "v:0,a:0 v:1,a:1 v:2,a:2")
 .outputOption("-preset veryfast")
 .output(`${outputFolder}/stream_%v.m3u8`)
 .on("start", (cmdline) => console.log(cmdline))
 .on("progress", (progress) => {
 let prog = Math.floor(progress.percent * 10) / 10;
 if (Math.round(prog) % 10 == 0) {
 console.log(`${prog}% complete`);
 }
 })
 .on("error", (err, stdout, stderr) => {
 if (err) {
 console.log(err.message);
 console.log("stdout:\n" + stdout);
 console.log("stderr:\n" + stderr);
 reject(err);
 }
 })
 .on("end", () => resolve())
 .run();
 });


In this code the sourcePath is usually a presigned URL from S3 (But I have also tried to download a file on /tmp and setting sourcePath as the path to the downloaded file) and outputFolder is
tmpdir()which is/tmp.

I have the lambda settings configured to have 10GB of memory and 10GB of ephemeral storage (the maximum allowed).


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ffmpeg is failing to load shared libraries after a ./configure with a prefix inside a conda environment
30 janvier 2024, par user3133806I am using
condaand building ffmpeg from source within that environment.

I ran the following commands :


conda create --name my_conda_env
conda activate my_conda_env
# Now I am in the conda environment
# $CONDA_PREFIX is /home/myuser/.conda/envs/my_conda_env/bin/ffmpeg

# Checkout ffmpeg code
# git checkout ...

./configure --prefix=$CONDA_PREFIX --enable-shared --disable-static && make distclean && make -j 100 && make install

# The above command does install the newly built ffmpeg into:
# /home/myuser/.conda/envs/my_conda_env/bin/ffmpeg

# However it fails to execute:
ffmpeg
ffmpeg: error while loading shared libraries: libavdevice.so.58: cannot open shared object file: No such file or directory

# When I add the conda lib path to LD_LIBRARY_PATH it works:
LD_LIBRARY_PATH=$CONDA_PREFIX/lib:$LD_LIBRARY_PATH ffmpeg
ffmpeg version n4.2.9-4-gd7beb0c61f Copyright (c) 2000-2023 the FFmpeg developers

# I thought ./configure with a --prefix will build a binary that will search for libraries relative to itself, but that does not appear to be the case:

strace -o /tmp/strace.out ffmpeg
tail /tmp/strace.out

openat(AT_FDCWD, "/usr/lib64/haswell/x86_64/libavdevice.so.58", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/usr/lib64/haswell/x86_64", 0x7fff65f56d90, 0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib64/haswell/libavdevice.so.58", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/usr/lib64/haswell", 0x7fff65f56d90, 0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib64/avx512_1/x86_64/libavdevice.so.58", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/usr/lib64/avx512_1/x86_64", 0x7fff65f56d90, 0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib64/avx512_1/libavdevice.so.58", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/usr/lib64/avx512_1", 0x7fff65f56d90, 0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib64/x86_64/libavdevice.so.58", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/usr/lib64/x86_64", 0x7fff65f56d90, 0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib64/libavdevice.so.58", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/usr/lib64", {st_mode=S_IFDIR|0555, st_size=49526, ...}, 0) = 0
writev(2, [{iov_base="ffmpeg", iov_len=6}, {iov_base=": ", iov_len=2}, {iov_base="error while loading shared libra"..., iov_len=36}, {i
ov_base=": ", iov_len=2}, {iov_base="libavdevice.so.58", iov_len=17}, {iov_base=": ", iov_len=2}, {iov_base="cannot open shared object file", iov_len=30}, {iov_base=": ", iov_len=2}, {iov_base="No such file or directory", iov_len=25}, {iov_base="\n", iov_len=1}], 10) = 
123


Conda documentation says not to use LD_LIBRARY_PATH here :




How can I build ffmpeg from source in a conda environment and have the binary find the .so file relative to itself ?


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PyDub can't locate FFmpeg, even after comfirming that FFmpeg is properly installed
14 avril 2023, par TordGAfter trying many solutions, checking that FFmpeg is installed correctly through cmd and other modules, PyDub still cannot find it. I am running Windows 11, Python 3.10.6, PyDub 0.25.1 and FFmpeg version 2023-04-12-git-1179bb703e-full_build-www.gyan.dev


I've tried to run the following code that should speed up an mp3 file within the directory by 100%


import os
from pydub import AudioSegment

file = r'test.mp3'

# Load the MP3 file
audio = AudioSegment.from_file(file, format="mp3")

# Increase the speed
audio = audio.speedup(playback_speed=2, chunk_size=150)

# Export the modified file to the same file name
audio.export(file, format="mp3")

# Delete the original file
os.remove(file)


From this I get the following error :


C:\Users\xxx\AppData\Local\Programs\Python\Python310\lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
 warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
C:\Users\xxx\AppData\Local\Programs\Python\Python310\lib\site-packages\pydub\utils.py:198: RuntimeWarning: Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work
 warn("Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work", RuntimeWarning)
Traceback (most recent call last):
 File "c:\Users\xxx\xxx\xxx\xxx\xxx\speed_up.py", line 7, in <module>
 audio = AudioSegment.from_file(file, format="mp3")
 File "C:\Users\xxx\AppData\Local\Programs\Python\Python310\lib\site-packages\pydub\audio_segment.py", line 728, in from_file
 info = mediainfo_json(orig_file, read_ahead_limit=read_ahead_limit)
 File "C:\Users\xxx\AppData\Local\Programs\Python\Python310\lib\site-packages\pydub\utils.py", line 274, in mediainfo_json
 res = Popen(command, stdin=stdin_parameter, stdout=PIPE, stderr=PIPE)
 File "C:\Users\xxx\AppData\Local\Programs\Python\Python310\lib\subprocess.py", line 969, in __init__
 self._execute_child(args, executable, preexec_fn, close_fds,
 File "C:\Users\xxx\AppData\Local\Programs\Python\Python310\lib\subprocess.py", line 1438, in _execute_child
 hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified
</module>

I've added FFmpeg to my path variable and checked that it worked by typing 'ffmpeg' in my command prompt. I also made sure that it was installed and pathed correctly by testing it with other modules that should use ffmpeg as well


The following code worked flawlessly (where moviepy uses ffmpeg as far as I know) :


from moviepy.editor import ColorClip

# Create a black clip with a duration of 5 seconds
empty_clip = ColorClip(size=(640, 480), color=(0, 0, 0), duration=5)

# Write the empty clip to a video file
empty_clip.write_videofile("empty.mp4", codec="libx264", fps=25)



I've specified the abs path in my code as :


AudioSegment.ffmpeg_path = r"C:\ffmpeg\bin\ffmpeg.exe"

Again this didn't work and I cannot find any more solutions anywhere


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