Wikipedia:Reference desk/Archives/Computing/2022 December 23

= December 23 =

mp4 or m4a?
Which between mp4 and m4a has minor data lost when rip from audio cd? 2001:B07:6442:8903:79E3:62D5:9A98:628D (talk) 08:05, 23 December 2022 (UTC)


 * mp4 and m4a are the same container format, and since they are only containers, they accommodate multiple types of data streams within. So it is not a matter of choosing between the file extension but choosing the audio codec and whether it is lossless or lossy, and in the latter case, parameters such as bitrate and sampling rate can factor into the resolution. Elizium23 (talk) 09:17, 23 December 2022 (UTC)


 * Thanks! --2001:B07:6442:8903:90A6:D5DA:13C0:D89C (talk) 14:10, 23 December 2022 (UTC)

IP and bookmarks
Actually I dont own any website, but if I have one, it is possible to discover the user's ip who bookmarked images of my website? 2001:B07:6442:8903:90A6:D5DA:13C0:D89C (talk) 14:15, 23 December 2022 (UTC)


 * No. You can see the IP address of anyone that visits your pages, but not whether they have bookmarked them.--Phil Holmes (talk) 17:11, 23 December 2022 (UTC)


 * No: the action of bookmarking the image is private, but you could still detect their IP each time they load the image via that bookmark, assuming its not cached, because this involves a request for the image being sent to the server. By observing a higher frequency of requests for an image from an IP than for the page that image is meant to be included on, you could make an informed guess that they were accessing it via a bookmark or something similar. I have no idea why someone would want to track something like that though.–small jars 18:35, 23 December 2022 (UTC)
 * @SmallJarsWithGreenLabels, I believe you are referring to the favicon that is displayed in the URL bar and bookmarks menu? Also, the lack of HTTP Referer can clue in the server that the user did not arrive there from another site or link, but from a bookmark, or typed in the URL, etc. Elizium23 (talk) 22:03, 23 December 2022 (UTC)