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• Executing shell script on Google Cloud Functions

  9 juillet 2020, par João Abrantes

  I am trying to encode .mp4 videos into hls using FFmpeg.

  


  I am using subprocess to call FFmpeg :

  


  def transcoder(data, context):
    """Background Cloud Function to be triggered by Cloud Storage.
       This generic function logs relevant data when a file is changed.

    Args:
        data (dict): The Cloud Functions event payload.
        context (google.cloud.functions.Context): Metadata of triggering event.
    Returns:
        None; the output is written to Stackdriver Logging
    """
    try:
        input_filename = data['name'].split('/')[-1] #videos have no extension
        input_path = f'/tmp/{input_filename}'
        print(f'filename {input_filename}')
        print(f'input_path {input_path}')
        print(f"bucket {data['bucket']}")
        print(f"name {data['name']}")

        outdir_path = f'/tmp/output/{input_filename}'
        os.makedirs(outdir_path, exist_ok=True)

        bucket = client.get_bucket(data['bucket'])
        blob = bucket.get_blob(data['name'])
        blob.download_to_filename(input_path)

        cmd = f'''ffmpeg -y -i {input_path} \
              -preset ultrafast -g 60 -sc_threshold 0 \
              -map 0:0 -map 0:1 -map 0:0 -map 0:1 \
              -s:v:0 360x640 -c:v:0 libx264 -b:v:0 365k \
              -s:v:1 720x1280 -c:v:1 libx264 -b:v:1 3000k \
              -c:a copy \
              -var_stream_map "v:0,a:0 v:1,a:1" \
              -master_pl_name master.m3u8 \
              -f hls -hls_time 6 -hls_list_size 0 \
              -hls_segment_filename "{outdir_path}/%v_fileSequence%d.ts" \
              -hls_playlist_type vod \
               {outdir_path}/%v_prog_index.m3u8'''

        process = subprocess.Popen(cmd)
        stdout, stderr = process.communicate()
        upload_local_directory_to_gcs(outdir_path, upload_bucket, input_filename)
    except Exception as e:
        print(e)


  


  The problem is that I get an error :

  


  [Errno 2] No such file or directory: 'ffmpeg -y -i /tmp/video -preset ultrafast -g 60 -sc_threshold 0 -map 0:0 -map 0:1 -map 0:0 -map 0:1 -s:v:0 360x640 -c:v:0 libx264 -b:v:0 365k -s:v:1 720x1280 -c:v:1 libx264 -b:v:1 3000k -c:a copy -var_stream_map "v:0,a:0 v:1,a:1" -master_pl_name master.m3u8 -f hls -hls_time 6 -hls_list_size 0 -hls_segment_filename "/tmp/output/video/%v_fileSequence%d.ts" -hls_playlist_type vod /tmp/output/video/%v_prog_index.m3u8': 'ffmpeg -y -i /tmp/video -preset ultrafast -g 60 -sc_threshold 0 -map 0:0 -map 0:1 -map 0:0 -map 0:1 -s:v:0 360x640 -c:v:0 libx264 -b:v:0 365k -s:v:1 720x1280 -c:v:1 libx264 -b:v:1 3000k -c:a copy -var_stream_map "v:0,a:0 v:1,a:1" -master_pl_name master.m3u8 -f hls -hls_time 6 -hls_list_size 0 -hls_segment_filename "/tmp/output/video/%v_fileSequence%d.ts" -hls_playlist_type vod /tmp/output/video/%v_prog_index.m3u8'


  


  But I know that the input files and the output files do exist because I debugged that using print(os.listdir(path)) so now I am wondering if the FFmpeg I call with subprocess has access to the /tmp folder..?

  


  I know that there is a Python FFmpeg library I could use, but I don't know how to run my FFmpeg command using that library. Can you help ?

  


  p.s. I can run this locally with success.

  


• Shell Script for passing multiple audio sources as arguments to a script that uses ffmpeg for recording video/audio ? [duplicate]

  29 novembre 2023, par Raul Chiarella

  I have the following Shell/Bash Script, that records video with audio in my Linux :

  


  #!/bin/bash

# Command to record audio from one microphone and video from one webcam
ffmpeg_cmd="ffmpeg -f video4linux2 -s 320x240 -i /dev/video0 -f alsa -ac 1 -i hw:1,0 -acodec libmp3lame -ab 96k camera.mp4"

# Execute the command
echo "Executing: $ffmpeg_cmd"
eval $ffmpeg_cmd


  


  This one works... But now :

  


  What I want is to be able to execute this Bash/Shell script passing multiple audio sources parameters and changing if video is going to be recorded or not (Video 1 Enabled, Video 0 Disabled), for example, using ./recordVideo.sh -a "audio1,audio2" -v 1...

  


  I tried recording a video accepting multiple audio sources arguments and passing it to FFMPEG using the following script :

  


  #!/bin/bash

# Default variables
audio_sources=""
video_flag=0

# Function to display help
usage() {
    echo "Usage: $0 -a 'Microphone1,Microphone2' -v 1"
    echo "  -a : List of audio sources, separated by commas"
    echo "  -v : Video flag (1 to record video, 0 not to record)"
    exit 1
}

# Parse arguments
while getopts "a,v" opt; do
  case $opt in
    a) audio_sources=$OPTARG ;;
    v) video_flag=$OPTARG ;;
    *) usage ;;
  esac
done

# Check if audio arguments were provided
if [ -z "$audio_sources" ]; then
    echo "Error: Audio sources not specified."
    usage
fi

# Initial ffmpeg command configuration
cmd="ffmpeg"

# Counter for source mapping
source_count=0

# Audio settings
IFS=',' read -ra ADDR <<< "$audio_sources"
for source in $ADDR; do
    cmd+=" -f alsa -ac 1 -i $source"
    cmd+=" -map $source_count"
    ((source_count++))
done

# Video settings
if [ "$video_flag" -eq 1 ]; then
    cmd+=" -f video4linux2 -s 320x240 -i /dev/video0 -map $source_count"
    ((source_count++))
fi

# Audio codec configuration
cmd+=" -acodec libmp3lame -ab 96k"

# Output file name
cmd+=" recordedVideo.mp4"

# Execute command
echo "Executing: $cmd"
eval $cmd


  


  But it is throwing the following error when I execute ./recordVideo.sh -a 'Microphone1,Microphone2' -v 1 :

  


  


  Error : Audio sources not specified.
Usage : ./recordVideo.sh -a 'Microphone1,Microphone2' -v 1
-a : List of audio sources, separated by commas
-v : Video flag (1 to record video, 0 not to record)

  


  


  Can someone help me ? :(
What am I doing wrong ? Is it the Shell Syntax or FFMPEG arguments that are wrong ?

  


• Revision 919553695c : third_party/libwebm : Pull from upstream Pulling latest libwebm from upstream.

  9 avril 2014, par Vignesh Venkatasubramanian

  Changed Paths :
   Modify /third_party/libwebm/README.webm

  
   Modify /third_party/libwebm/mkvmuxerutil.cpp

  
   Modify /third_party/libwebm/mkvreader.cpp

  
   Modify /third_party/libwebm/mkvreader.hpp

  
  
  third_party/libwebm : Pull from upstream

  Pulling latest libwebm from upstream.

  Change-Id : I62edafb0b0283160c9b4060fd5907e3aad6c7820