转码

本文提供了Python SDK转码的操作步骤及完整的代码示例。

转码相关API调用及参数详细信息请参见提交转码作业。

1. 创建AcsClient实例。

   client = AcsClient(access_key_id, access_key_secret, mps_region_id);

2. 创建request，并设置参数。

   request = SubmitJobsRequest.SubmitJobsRequest()
   request.set_accept_format('json')

3. 设置转码参数。
   说明

   • 通过SDK提交转码作业时Object需经URLEncode，否则会导致转码失败。更多信息，请参见URL Encoding说明。
   • 请按照规范填写文件名称，否则会找不到文件导致转码失败。详细名称规范，请参见参数详情。
   • Input

     job_input = {'Location': oss_location,
                   'Bucket': oss_bucket,
                   'Object': quote(oss_input_object) }
     request.set_Input(json.dumps(job_input))

   • Output

     output = {'OutputObject': quote(oss_output_object)}

     • Container

       output['Container'] = {'Format': 'mp4'}

     • Video
       说明 如果使用转码模板进行转码则无需配置此参数。如果配置此参数，则覆盖指定转码模板中的对应参数。

       output['Video'] = {'Codec': 'H.264',
                             'Bitrate': 1500,
                             'Width': 1280,
                             'Fps': 25}

     • Audio
       说明 如果使用转码模板进行转码则无需配置此参数。如果配置此参数，则覆盖指定转码模板中的对应参数。

       output['Audio'] = {'Codec': 'AAC',
                             'Bitrate': 128,
                             'Channels': 2,
                             'Samplerate': 44100}

     • TemplateId

       output['TemplateId'] = template_id

   • PipelineId

     request.set_PipelineId(pipeline_id)

4. 发起API请求并显示返回值。

   response_str = client.do_action_with_exception(request)
   response = json.loads(response_str)
   print 'RequestId is:', response['RequestId']
   if response['JobResultList']['JobResult'][0]['Success']:
   print 'JobId is:', response['JobResultList']['JobResult'][0]['Job']['JobId']
   else:
   print ('SubmitJobs Failed code:',
         response['JobResultList']['JobResult'][0]['Code'],
         ' message:',
         response['JobResultList']['JobResult'][0]['Message'])

# -*- coding: utf8 -*-
import json
from urllib import quote
from aliyunsdkcore.client import AcsClient
from aliyunsdkmts.request.v20140618 import SubmitJobsRequest
access_key_id = 'xxx'
access_key_secret = 'xxx'

# 服务地域ID
mps_region_id = 'cn-hangzhou'
# 管道ID
pipeline_id = 'xxx'
# 模板ID
template_id = 'S00000001-200010'
# OSS的Location
oss_location = 'oss-cn-hangzhou'
# OSS的Bucket
oss_bucket = 'xxx'
# 输入Object
oss_input_object = 'input.mp4'
# 输出Object
oss_output_object = 'output.mp4'
# 创建AcsClient实例
client = AcsClient(access_key_id, access_key_secret, mps_region_id);
# 创建request，并设置参数
request = SubmitJobsRequest.SubmitJobsRequest()
request.set_accept_format('json')
# Input
job_input = {'Location': oss_location,
             'Bucket': oss_bucket,
             'Object': quote(oss_input_object) }
request.set_Input(json.dumps(job_input))
# Output
output = {'OutputObject': quote(oss_output_object)}
# Ouput->Container
output['Container'] = {'Format': 'mp4'}
# Ouput->Video
output['Video'] = {'Codec': 'H.264',
                   'Bitrate': 1500,
                   'Width': 1280,
                   'Fps': 25}
# Ouput->Audio
output['Audio'] = {'Codec': 'AAC',
                   'Bitrate': 128,
                   'Channels': 2,
                   'Samplerate': 44100}
# Ouput->TemplateId
output['TemplateId'] = template_id
outputs = [output]
request.set_Outputs(json.dumps(outputs))
request.set_OutputBucket(oss_bucket)
request.set_OutputLocation(oss_location)
# PipelineId
request.set_PipelineId(pipeline_id)
# 发起API请求并显示返回值
response_str = client.do_action_with_exception(request)
response = json.loads(response_str)
print 'RequestId is:', response['RequestId']
if response['JobResultList']['JobResult'][0]['Success']:
    print 'JobId is:', response['JobResultList']['JobResult'][0]['Job']['JobId']
else:
    print ('SubmitJobs Failed code:',
           response['JobResultList']['JobResult'][0]['Code'],
           ' message:',
           response['JobResultList']['JobResult'][0]['Message'])