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• Alfresco fails to create video thumbnail

  17 octobre 2019, par Deckard

  As error log says : Empty input file ... It turned out that the source image for ImageMagick is zero sized. (/data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg). When I manually replace the source image to normal image and execute the command again, there’s no error.

  command:    /data/was/alfresco/common/bin/convert /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg[0] -auto-orient -resize "100x100>" -strip -quiet /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_target_7652060684136589026.png

  So I think the source image is maybe made by FFMPEG by capturing some frame of the video.
  And the FFMPEG somehow failed to do it. Not sure my guess is right...

  But my FFMPEG works good as ffmpeg -version shows proper version info. And FFMPEG is run by root and the Alfresco daemon instance is run by root. It seems that there’s nothing wrong.

  Please review it. Here’s the whole Alfresco-share log :

  Caused by: org.alfresco.service.cmr.repository.ContentIOException: 09160037 Content conversion failed:
  
     reader: ContentAccessor[ contentUrl=store:///data/was/alfresco/tomcat/temp/Alfresco/ComplextTransformer_intermediate_mp4_262176879279399174.jpg, mimetype=image/jpeg, size=0, encoding=UTF-8, locale=en_US]
  
     writer: ContentAccessor[ contentUrl=store:///data/was/alfresco/tomcat/temp/Alfresco/FailoverTransformer_intermediate_ComplexContentTransformer_5223852355212570043.png, mimetype=image/png, size=0, encoding=UTF-8, locale=en_US]
  
     options: {use=doclib, contentReaderNodeRef=null, contentWriterNodeRef=null, sourceContentProperty=null, imageAutoOrient=true, targetContentProperty=null, commandOptions=, imageResizeOptions=ImageResizeOptions [width=100, height=100, maintainAspectRatio=true, percentResize=false, resizeToThumbnail=false, allowEnlargement=false], includeEmbedded=null}
  
     limits: {timeoutMs=120000, pageLimit=1}
  
          at org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:350)
  
          at org.alfresco.repo.content.transform.ComplexContentTransformer.transformInternal(ComplexContentTransformer.java:492)
  
          at org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:272)
  
          ... 32 more
  
  Caused by: org.alfresco.service.cmr.repository.ContentIOException: 09160036 Failed to perform ImageMagick transformation:
  
  Execution result:
  
     os:         Linux
  
     command:    /data/was/alfresco/common/bin/convert /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg[0] -auto-orient -resize "100x100>" -strip -quiet /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_target_7652060684136589026.png
  
     succeeded:  false
  
     exit code:  1
  
     out:
  
     err:        .convert.bin: Empty input file `/data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg' @ error/jpeg.c/JPEGErrorHandler/331.
  
  .convert.bin: NoImageForProperty "%w" @ warning/property
  
          at org.alfresco.repo.content.transform.magick.ImageMagickContentTransformerWorker.transformInternal(ImageMagickContentTransformerWorker.java:205)
  
          at org.alfresco.repo.content.transform.magick.AbstractImageMagickContentTransformerWorker.transform(AbstractImageMagickContentTransformerWorker.java:284)
  
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  
          at java.lang.reflect.Method.invoke(Method.java:498)
  
          at org.alfresco.repo.management.subsystems.SubsystemProxyFactory$1.invoke(SubsystemProxyFactory.java:79)
  
          at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
  
          at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
  
          at com.sun.proxy.$Proxy28.transform(Unknown Source)
  
          at org.alfresco.repo.content.transform.ProxyContentTransformer.transformInternal(ProxyContentTransformer.java:107)
  
          at org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:272)
  
          ... 34 more

  In alfresco-global.properties : ffmpeg.exe=/usr/local/bin/ffmpeg/ffmpeg

  * Update As Robert suggested, TransFormer log level changed to debug.
  But the log is too long to paste here. There’s 30,000 characters limit of body in SO which github doesn’t have.
  So please refer to github issue, I pasted the log there.
  https://github.com/Alfresco/share/issues/127

• MoviePy error : failed to read the first frame of video file... That may also mean that you are using a deprecated version of FFMPEG

  30 août 2023, par Alister Kwapisz

  When I run a python telegram bot script locally, it works completely fine but when I run the script on PythonAnywhere I get an error that shows up when I try to generate a video :

  


  "2023-08-29 15:21:53,138 (__init__.py:960 MainThread) ERROR - TeleBot: "Infinity polling exception: MoviePy error: failed to read the first frame of video file /home/AlisterK/video_clips/Video 2023-01-10 &#xA;18 45 07.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Pleas&#xA;e update to a recent version from the website."&#xA;2023-08-29 15:21:53,138 (__init__.py:962 MainThread) ERROR - TeleBot: "Exception traceback:&#xA;Traceback (most recent call last):&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/__init__.py", line 955, in infinity_polling&#xA;    self.polling(non_stop=True, timeout=timeout, long_polling_timeout=long_polling_timeout,&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/__init__.py", line 1043, in polling&#xA;    self.__threaded_polling(non_stop=non_stop, interval=interval, timeout=timeout, long_polling_timeout=long_polling_timeout,&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/__init__.py", line 1118, in __threaded_polling&#xA;    raise e&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/__init__.py", line 1074, in __threaded_polling&#xA;    self.worker_pool.raise_exceptions()&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/util.py", line 147, in raise_exceptions&#xA;    raise self.exception_info&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/util.py", line 90, in run&#xA;    task(*args, **kwargs)&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/telebot/__init__.py", line 6788, in _run_middlewares_and_handler&#xA;    result = handler[&#x27;function&#x27;](message)&#xA;  File "/home/AlisterK/Video generator.py", line 34, in generate_video_command&#xA;    generated_video = generate_video(audio_files[user_id])&#xA;  File "/home/AlisterK/Video generator.py", line 72, in generate_video&#xA;    clips = [VideoFileClip(os.path.join(input_folder, clip_file)).subclip(0, clip_duration) for clip_file in video_clips]&#xA;  File "/home/AlisterK/Video generator.py", line 72, in <listcomp>&#xA;    clips = [VideoFileClip(os.path.join(input_folder, clip_file)).subclip(0, clip_duration) for clip_file in video_clips]&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/moviepy/video/io/VideoFileClip.py", line 88, in __init__&#xA;    self.reader = FFMPEG_VideoReader(filename, pix_fmt=pix_fmt,&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/moviepy/video/io/ffmpeg_reader.py", line 73, in __init__&#xA;    self.lastread = self.read_frame()&#xA;  File "/home/AlisterK/.local/lib/python3.10/site-packages/moviepy/video/io/ffmpeg_reader.py", line 133, in read_frame&#xA;    raise IOError(("MoviePy error: failed to read the first frame of "&#xA;OSError: MoviePy error: failed to read the first frame of video file /home/AlisterK/video_clips/Video 2023-01-10 18 45 07.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent version from the website."&#xA;</listcomp>

  


  I tried updating ffmpeg and moviepy. I even tried different versions but to no avail. The video clips are not corrupted as I checked.

  


  This part of the code is responsible for generating the videos :

  


  def generate_video(audio_path):
    input_folder = '/home/AlisterK/video_clips'  # Replace with your folder path
    output_file = '/home/AlisterK/output_combined_video.mp4'
    clip_duration = 3  # Duration of each clip in seconds
    num_clips = 10     # Number of video clips to select and combine

    width = 1080  # Replace with your desired width
    height = 1920  # Replace with your desired height

    video_clips = random_files_in_folder(input_folder, '.mp4', num_clips)

    clips = [VideoFileClip(os.path.join(input_folder, clip_file)).subclip(0, clip_duration) for clip_file in video_clips]
    standardized_clips = [clip.resize((width, height)) for clip in clips]  # Ensure consistent resolutions

    final_clip = concatenate_videoclips(standardized_clips)

    final_audio = AudioFileClip(audio_path)


  


• ffmpeg status & quality / cuda (CPU/GPU)

  18 avril 2015, par cocco

  ffmpeg am i doing it right ?

  So much time has passed since i use ffmpeg to convert clips on my home web server, now that mp4 (h264 & aac) is the current overall standard (works on every console, smartphone, smartTV, pc) i decided to convert my old clips from various digital cameras to to this new container/codecs.

  1. less space & the same quality.
  2. compatibility
  3. support for tags (subler for mac)

  after some research i opted for ffmpeg because of various reasons

  1. commandline (i made my simple web interface with default settings wich i execute with php’s exec)
  2. the quality/size amount

  I read that many expensive video conversion softwares are not able to handle low bitrate videos properly. I also tested some of them and personally i could not find the proper export settings or i was not impressed by the results... some had fixed default export setings, most had a lower video quality at the same filesize. ffmpeg allows me to set the -crf (18-24 usually) and -preset (veryslow, fast..) witch allows me to reduce the filesize drastically mantaining the same
  visible quality.

  Said that i’m using the preset at veryslow.(there is also placebo but the final video file is only 1% smaller in size).

  And here is the command i use

  ffmpeg
  
  -y //overwrite the file if it exists
  
  
  
  -i INPUTFILE // replace with the input file
  
  
  
  -metadata title=THETITLE // set a nice title, visible on modern devices
  
  -metadata date=THEDATE // set a nice title, visible on modern devices
  
  
  
  -c:v libx264 // use the h264 codec
  
   -crf 21 // try different numbers between 18-26
  
   -preset veryslow // placebo,slow,fast,ultrafast==big file 
  
   -tune film // tune it a little
  
   -pix_fmt yuv420p // preferred on most modern devices
  
   -profile:v main // preferred on most modern devices
  
   -level 3.1 // preferred on most modern devices 
  
   -refs 4 // preferred on most modern devices
  
  
  
  -c:a libfdk_aac // use aac
  
   -metadata:s:a language=eng // set a language, visible on modern devices 
  
   -b:a 128k // audio bitrate 128k is like mp3 192k
  
   -ar 48000 // 44100 ... whatever
  
   -ac 2 // audiochannels
  
   -movflags +faststart //move the metadata in the front of the video so it loads faster
  
  
  
  OUTPUTFILE

  some camcorder clips with m2ts already have the avc/h264 compatible codec so i just copy the stream.
  some have the ac3/dolby sorround audio. I convert the audio but keep the ac3 as second audio track mapping the ffmpeg streams.this allows me to watch the mp4 on browsers and mobile devices but i’m able to keep the surround sound to playback on some tv’s, advanced media players or devices like apple tv.

  not that i’m not happy with the speed (using quad core’s) but i recently read again about cuda opencl and there is also the simple fact that i’m not using other converters than ffmpeg since alot of time.

  Is ffmpeg (with the setting i use) a good converter to keep the same video quality than the source reducing the space occupied by and average of 30-40% ?

  Is GPU conversion really that bad (cuda .. testing a gtx970) ?
  it would be nice to add some more speed to the conversions by using both the gpu and the cpu..but for my understanding they cannot work together ??? and using only gpu is a drastical quality loss...cpu si more precise, gpu is faster in calculation are too imprecise from what i read.. so expensive softwares use cuda only for preview purpose... right ?

  Is ffmpeg or another software compatible with CPU+GPU encoding ?
  i really don’t remember where, but i read that the ffmpeg is not a good videoconverter.

  i’m really happy with the size/quality, i gained an average of 30% in space with no visible quality loss. With some extra parameters i can adjust some really old analog videos that are deinterlaced in a really bad way.

  maybe i could gain more size/quality with another software ???

  note : i like ffmpeg.it’s free and it has commandline so i can create my own interface with php html & js and use it on various machines without the need to install it in every device i use. i uplad the idevice clips directly to the ffmpeg server.

  btw. : explain the downvotes...

  EDIT :

  @talonmies ...cuda tag removed :

  http://www.nvidia.com/object/cuda_home_new.html

  CUDA® is a parallel computing platform and programming model invented
  by NVIDIA. It enables dramatic increases in computing performance by
  harnessing the power of the graphics processing unit (GPU). With
  millions of CUDA-enabled GPUs sold to date, software developers,
  scientists and researchers are finding broad-ranging uses for GPU
  computing with CUDA. Here are a few examples : - See more at :
  http://www.nvidia.com/object/cuda_home_new.html#sthash.dEYaqae7.dpuf

  isn’t cuda the programming model that a theoretical ffmpeg library should support to handle GPU encoding on nvidia cards like the gtx 970 ?? like the badaboom software http://www.geforce.com/games-applications/pc-applications/badaboom-media-converter.