python - How to extract Second to Byte offset for a MP4? -


how second offset byte offset mp4 video/audio? able "webm" not mp4. following code takes input of video/audio , outputs tuples containing (time offset,byte offset).

from ebml.schema import ebmldocument, unknownelement, container, binary  def fill_video_info(element, offset, video_info):   if element.name == 'duration':     video_info['duration'] = element.value    if element.name == 'displaywidth':     video_info['width'] = element.value    if element.name == 'displayheight':     video_info['height'] = element.value    if element.name == 'cluster':     video_info['clusters'].append({'offset': offset})    if element.name == 'timecode':     video_info['clusters'][-1]['timecode'] = element.value    if element.type == container:     sub_el in element.value:       fill_video_info(sub_el, offset + element.head_size, video_info)       offset += sub_el.size  import sys import json import os def getinfo(filename):    mod_name, _, cls_name = 'ebml.schema.matroska.matroskadocument'.rpartition('.')   try:     doc_mod = __import__(mod_name, fromlist=[cls_name])     doc_cls = getattr(doc_mod, cls_name)   except importerror:     parser.error('unable import module %s' % mod_name)   except attributeerror:     parser.error('unable import class %s %s' % (cls_name, mod_name))    video_info = {}   video_info['filename'] = filename   video_info['total_size'] = os.stat(filename).st_size   video_info['clusters'] = []    open(filename, 'rb') stream:     doc = doc_cls(stream)     offset = 0     el in doc.roots:       fill_video_info(el, offset, video_info)       offset += el.size    return video_info  if __name__ == '__main__':     print json.dumps(getinfo(sys.argv[1]))     pass

any idea on how mp4?


Comments

Post a Comment

Popular posts from this blog

Command prompt result in label. Python 2.7 -

i want put result(output) of shell command label. command works, label shows "0", however, in command prompt, result shown correctly, need showed in label. doing ubuntu. myg1 = button(root, text="rodyti informacija", command=lambda: gauti()) myg1.pack(side=bottom) def gauti(): imti = tekstas.get("1.0", "end-1c") info = subprocess.call("id '{imti}' ".format(imti=imti), shell=true) w = label(root, text= info) w.pack(side = bottom) subprocess.call() returns exit code of process created (in case 0 success). if want text output of process, should instead call subprocess.check_output() .
Read more

javascript - How do I use URL parameters to change link href on page? -

i change href value of link using url parameters. example: default <a id="dlink" href="link-1">link</a> but, when user goes https://url.com/?dlink=link-2 it swaps out link new link <a id="dlink" href="link-2">link</a> first need value url. if you're not using javascript framework can create function using jquery. please check get url parameter jquery or how query string values in js it. after that, element "a" id , set value there. $("#dlink").attr("href", hreffromparam);
Read more

amazon web services - AWS Route53 Trying To Get Site To Resolve To www -

so have domain nameservers pointed aws route 53. site hosted on ec2 instance , reachable resolves site.com, if input www.site.com. i'm curious how site resolve www.site.com. have under route53 domains hosted zone 2 additional record sets outside of ns , soa: a site.com ec2 elastic ip cname www.site.com ec2 public dns i can reach site using both site.com , www.site.com, resolve site.com. there way make if enter either, resolves www.site.com? at first, both should record set. a site.com ec2 elastic ip www.site.com ec2 elastic ip and need redirect setting in web server (nginx, apache, ..) following. (source: how redirect www non-www nginx on centos 7 ) redirect non-www www if want redirect users plain, non-www domain www domain, add server block: server { server_name example.com; return 301 $scheme://www.example.com$request_uri; } save , exit. configures nginx redirect requests "example.com" "www.example.com". not...
Read more