Boto3视频从Heroku上传0字节

Question

I have a small Flask api that takes a video and an image, overlays the image on the video and uploads the result to Amazon S3. I am using ffmpeg to do the actual overlaying. Here is that code:

command = "ffmpeg -i {0} -i {1} -filter_complex \"overlay=0:0\" {2}".format(background_name, overlay_name, output_name)
subprocess.getoutput(command)

Then I simply upload it via Boto3:

s3.upload_file(output_name, VIDEO_BUCKET_NAME, output_name)

This code works fine when I run on localhost; however, when I test in while deployed to Heroku, it always uploads a file with 0 bytes. I suspect that it may be a problem with Heroku's transient filesystem, but the file is being used immediately after it is created.

Answer 1

我知道这并不能真正回答我的问题，但是我从Heroku上删除了API，并将其部署在AWS Elastic Beanstalk上，现在图像和视频上传均可正常工作。