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• Can't import to Unity video clip rendered using FFmpeg for Unity

  29 juin 2023, par Maximiliano Bezmalinovic

  I am using FFmpeg to render a video in Unity. For the FFmpegCaptureCommand.OutputOptions I'm using this command :

  


  -g 24 -c:v h264 -preset medium -crf 32 -pix_fmt yuv420p -color_primaries bt709 -color_trc bt709 -colorspace bt709 -color_range pc -f mov -movflags frag_keyframe+empty_moov -vf setpts=2*PTS


  


  The video output plays fine on windows media player or VLC but when I try to import the clip into Unity I get the following error :

  


  WindowsVideoMedia error 0xc00d36e6 while reading C:/.../d.mov

Context: Getting duration.
Error details: The requested attribute was not found.
Track types:
   Video Track [1024 x 1024], type: H264


  


  I can create a working copy of the video with this command :

  


  ffmpeg -i input.mov output.mov


  


  I assume ffmpeg creates a new container for the video when it copies it but I can't figure out why is not doing it in the first place.

  


  Using ffprobe

  


  ffprobe -show_streams -select_streams v C:\...\d.mov   


  


  I get this info on the original video :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\...\d.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf59.4.101
  Duration: 00:00:02.97, start: 0.066667, bitrate: 2471 kb/s
  Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1024x1024, 2465 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : FFMP
      encoder         : Lavc59.4.100 libx264
[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=High
codec_type=video
codec_tag_string=avc1
codec_tag=0x31637661
width=1024
height=1024
coded_width=1024
coded_height=1024
closed_captions=0
has_b_frames=2
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=yuvj420p
level=32
color_range=pc
color_space=bt709
color_transfer=bt709
color_primaries=bt709
chroma_location=left
field_order=unknown
refs=1
is_avc=true
nal_length_size=4
id=N/A
r_frame_rate=30/1
avg_frame_rate=30/1
time_base=1/15360
start_pts=1024
start_time=0.066667
duration_ts=45568
duration=2.966667
bit_rate=2465649
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
DISPOSITION:captions=0
DISPOSITION:descriptions=0
DISPOSITION:metadata=0
DISPOSITION:dependent=0
DISPOSITION:still_image=0
TAG:handler_name=VideoHandler
TAG:vendor_id=FFMP
TAG:encoder=Lavc59.4.100 libx264
[/STREAM]


  


  and this on the copied video :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\...\d1.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf59.4.101
  Duration: 00:00:02.97, start: 0.000000, bitrate: 2869 kb/s
  Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1024x1024, 2865 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : FFMP
      encoder         : Lavc59.4.100 libx264
[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=High
codec_type=video
codec_tag_string=avc1
codec_tag=0x31637661
width=1024
height=1024
coded_width=1024
coded_height=1024
closed_captions=0
has_b_frames=2
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=yuvj420p
level=32
color_range=pc
color_space=bt709
color_transfer=bt709
color_primaries=bt709
chroma_location=left
field_order=unknown
refs=1
is_avc=true
nal_length_size=4
id=N/A
r_frame_rate=30/1
avg_frame_rate=30/1
time_base=1/15360
start_pts=0
start_time=0.000000
duration_ts=45568
duration=2.966667
bit_rate=2865152
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=89
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
DISPOSITION:captions=0
DISPOSITION:descriptions=0
DISPOSITION:metadata=0
DISPOSITION:dependent=0
DISPOSITION:still_image=0
TAG:handler_name=VideoHandler
TAG:vendor_id=FFMP
TAG:encoder=Lavc59.4.100 libx264
[/STREAM]


  


  I noticed the start_time is 0.000000 on the copied video but the original is 0.066667, I wonder if that has anything to do with it.

  


  If I look at the video properties/details the "Length" attribute is missing on the original video but exists in the copy. Does Unity need that info maybe ?

  


  What am I missing here ? How could I make my original command output a video with the proper data that Unity needs for importing it ?.

  


  Thanks in advance.

  


• avcodec/x86/mathops : clip constants used with shift instructions within inline assembly

  16 juillet 2023, par Rémi Denis-Courmont

  avcodec/x86/mathops : clip constants used with shift instructions within inline assembly
  Fixes assembling with binutil as >= 2.41
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/x86/mathops.h

• Ffmpeg ouputting empty file to s3 when editing a remote video clip on AWS Lambda function

  8 août 2023, par enjoysturtles

  I'm trying to take a clip from a remote url, use ffmpeg to edit it, and save the result to s3.

  


  I have a layer installed with ffmpeg attached to a lambda function. The lambda function runs an ffmpeg script on it and uploads the result to S3, however, the file size is either much smaller than it should be, or 0 bytes.

  


  Locally, the code works perfectly, and it's outputting 500kb files into lambda. I'm running python 3.9 locally as well as on the lambda.

  


  I thought that the file was not downloading fully before ffmpeg begins processing, which would explain the much smaller output file sizes.

  


  I tried downloading the remote file to the lambda's /tmp and using that as the input for ffmpeg, but I continued having the same issue with the empty file.

  


  Here's all the code in my lambda function :

  


  import json
import subprocess
import shlex
import boto3
from datetime import datetime

def lambda_handler(event, context):
    download_url = 'https://newslater-resources.s3.us-west-2.amazonaws.com/ca4a9d5b-691a-49cc-90aa-15636c222017.mov'

    s3 = boto3.client(
      's3',
      region_name="us-east-1",
    )

    key = '/edits/%s.mov' % int(datetime.utcnow().timestamp())

    command='''
      /opt/bin/ffmpeg -i %s \
        -vf "crop=w=in_h*9/16:h=in_h,scale=1080x1920" \
        -vcodec libx264 \
        -crf 23 \
        -preset veryfast \
        -c: a copy \
        -s 1080x1920 \
         - -y
    ''' % (download_url)

    split_command = shlex.split(command)

    p1 = subprocess.run(split_command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    response = s3.put_object(Body=p1.stdout, Bucket='edited-clips', Key=key)

    signed_url = s3.generate_presigned_url(
      ClientMethod='get_object',
      Params={
        'Bucket': 'edited-clips',
        'Key': key,
      } 
    )


  


  Any help would be greatly appreciated. Thank you !