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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
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Stereo master soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Audio
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Elephants Dream - Cover of the soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
Type : Audio
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#6 Teaser Music
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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Sur d’autres sites (116)
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ffmpeg : Unrecognized option 'alpha_quality'
16 avril, par László MondaI want to make transparent videos work in Safari, which doesn't support WebM for this purpose but only H265 with alpha transparency.


According to this post, I used Shutter Encoder, but only some of its versions work for this purpose on Mac.


Instead of using Shutter Encoder on Mac, I want to use ffmpeg on my Linux PC. Shutter Encoder uses the following command in the background :


ffmpeg -threads 0 -hwaccel none -i input.mov -c:v hevc_videotoolbox -alpha_quality 1 -b:v 1000k -profile:v main -level 5.2 -map v:0 -an -pix_fmt yuva420p -sws_flags bicubic -tag:v hvc1 -metadata creation_time=2024-04-14T14:53:08.734684Z -y output.mp4


which yields the following output on my PC :


ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
 configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
 WARNING: library configuration mismatch
 avcodec configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libaribb24 --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc --enable-libsmbclient
 libavutil 56. 70.100 / 56. 70.100
 libavcodec 58.134.100 / 58.134.100
 libavformat 58. 76.100 / 58. 76.100
 libavdevice 58. 13.100 / 58. 13.100
 libavfilter 7.110.100 / 7.110.100
 libswscale 5. 9.100 / 5. 9.100
 libswresample 3. 9.100 / 3. 9.100
 libpostproc 55. 9.100 / 55. 9.100
Unrecognized option 'alpha_quality'.
Error splitting the argument list: Option not found



When googling for "Unrecognized option 'alpha_quality'.", there are no results, which I find very odd.


What's going on, and how can I make ffmpeg work for this purpose without Shutter Encoder ?


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HLS. FFmpeg : error when loading first segment [closed]
30 avril, par rus_99_pkI'm trying to download a streaming video using ffmpeg. There is a file in the format *.m3u8. BUT, if everything was so simple, I would not have come here.


There are a number of nuances :


- 

- It cannot be downloaded by specifying a link to the file
- If you upload the file and look at its contents, there will be :
#EXT-X-KEY:METHOD=AES-128,URI="[KEY],IV=[IV]






With a URI, the task is easy to solve ; just specify the value list.m3u8.


I end up getting :


Error when loading first segment 'https://cdnv-m12.boomstream.com/vod/hash:21596def3216ed982660d609751b8078/id:35105.29443.1039983.85853232.150106.hls/time:0/data:eyJ2ZXJzaW9uIjoiMS4yLjk3IiwidXNlX2RpcmVjdF9saW5rcyI6InllcyIsImlzX2VuY3J5cHQiOiJ5ZXMifQ==/m61/2024/04/27/1Q0idCxb.mp4/media-1.ts'



But with IV it’s more difficult, because file processing is performed on the server side. Please help.


I tried to get JS with similar variable names and monitor network traffic using Wireshark, in the hope of catching a response from the server with IV.


But it didn't help me.


My script for download :


#!/bin/bash
clear

link="/home/user/Download/chunklist.m3u8"
filename="testfile"

ffmpeg \
-headers $'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0\r\nAccept: */*\r\nAccept-Language: ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3\r\nAccept-Encoding: gzip, deflate, br\r\nOrigin: https://example.com\r\nConn>
-protocol_whitelist "file,http,https,tcp,tls,crypto" \
-allowed_extensions ALL \
-f hls \
-i "$link" \
-map p:2 \
-bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 /tmp/$filename.mp4 -v trace





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ffmpeg output with label 'v' does not exist in any defined filtler graph
15 avril, par David RoyaleBeen trying to make this Python code work but it fails up until rendering the final part :


import subprocess
import re
import os

def detect_idle_sections(video_path):
 command = ['ffmpeg', '-i', video_path, '-vf', 'select=\'gt(scene,0.1)\'', '-vsync', 'vfr', '-f', 'null', '-']
 output = subprocess.check_output(command, stderr=subprocess.STDOUT).decode('utf-8')
 
 idle_sections = []
 duration = 0.0
 for line in output.split('\n'):
 match = re.search(r'scene:(\d+)', line)
 if match:
 scene = int(match.group(1))
 if scene == 0:
 duration += 1.0 / 30 # Assuming 30 fps
 else:
 if duration > 0:
 idle_sections.append((duration, duration - (1.0 / 30))) # Duration and start time
 duration = 0.0
 
 return idle_sections

def cut_idle_sections(video_path, idle_sections, output_path, total_duration):
 print("starting to cut things")
 filters = []
 start_time = 0.0
 for duration, _ in idle_sections:
 filters.append(f'[0:v]trim=start={start_time}:end={start_time + duration},setpts=PTS-STARTPTS[v{len(filters)}]')
 start_time += duration
 
 if start_time < total_duration:
 filters.append(f'[0:v]trim=start={start_time},setpts=PTS-STARTPTS[v{len(filters)}]')

 filter_str = ';'.join(filters)
 print("finished chopping")
 command = ['ffmpeg', '-i', video_path, '-filter_complex', filter_str, '-map', '[v]', output_path]
 subprocess.call(command)

def get_total_duration(video_path):
 print("prior getting time")
 command = ['ffprobe', '-v', 'error', '-show_entries', 'format=duration', '-of', 'default=noprint_wrappers=1:nokey=1', video_path]
 output = subprocess.check_output(command).decode('utf-8').strip()
 print("after getting time")
 return float(output)

input_file = r"C:\Users\D\Videos\2024-04-15 08-42-53.mkv"
output_file = r"C:\Users\D\Videos\output_video.mp4"

# Get full paths
input_path = os.path.abspath(input_file)
output_path = os.path.abspath(output_file)

total_duration = get_total_duration(input_path)
idle_sections = detect_idle_sections(input_path)
cut_idle_sections(input_path, idle_sections, output_path, total_duration)



The error I am getting is :


[out#0/mp4 @ 000001af60f9d3c0] Output with label 'v' does not exist in any defined filter graph, or was already used elsewhere.
Error opening output file C:\Users\D_era\Videos\output_video.mp4.
Error opening output files: Invalid argument



The code is intended to cut "iddle" frames where frame a = frame b. I want to point out that I don't really care about audio, so it's just comparing if frames "A" through "H" are the same and keeping a and continuing with the rest of the video.


Putting some comments to determine which part was successful and which broke, I found that the line failig is this :


command = ['ffmpeg', '-i', video_path, '-filter_complex', filter_str, '-map', '[v]', output_path]



and apparently is the -map part.