It's taken a very long time, but you've finally found and downloaded that audio or video file you've been looking for. So it's particularly frustrating that it won't play. At all. But why?
You could try downloading the file again, just in case it was corrupted. Maybe using another media player would help. How about installing a new codec pack? Troubleshooting media problems is tricky, and you could spend hours trying to figure out the problem.
There is a quicker alternative, though. Just open your audio or video file in MediaInfo, and you'll see lots of technical information about it: video and audio stream type, codec, aspect ratio, frames per second, sample rate and more.
If the file is broken - a missing video stream, say - then you'll see that immediately, and won't have to waste time tweaking your own system. And if it's just using a codec that you don't have installed, then you can quickly grab the latest version, and hopefully fix your playback problems right away. (There's even a "go to the web site of this video codec" button, so it's only a single click away.)
As a bonus, MediaInfo also displays file tags: album and track name, performer, composer, publisher, whatever it might contain. And wide support for video and audio formats means it'll work with just about any file type - MKV, OGM, AVI, DivX, WMV, QuickTime, Real, MPEG-1, MPEG-2, MPEG-4, DVD (VOB), OGG, MP3, WAV, RA, AC3, DTS, AAC, M4A, AU, AIFF and more.
Version 18.03 brings (changelog):
+ AV1: support of AOmedia AV1 based on latest specifications draft, raw (OBU) and in MKV
+ MXF: HDR metadata support
+ MXF: detection and parsing of ProRes (SMPTE RDD 44)
+ MXF: framerate container/stream incoherence detection
+ DPX: endianess, packing mode, compression mode
+ AVC: add consumer camera recording date/time
+ AVC: add consumer camera model name and iris F number
+ JPEG: ICC parsing, display of ICC color space
+ EBUCore: possibility to inject external metadata in the output from MediaInfo
+ JSON output
+ Attachments: do not provide anymore attachments content in XML by default, reducing XML output size
x colour description: trying (again!) to have more coherent labeling
x DCP/IMF: fix crash with some CPL files
x I782, FFV1: Golomb Rice parsing was wrong
x I210, FFV1: remove sar_den test must be 0 if sar_num is 0
x AAC: SBR parsing issue with 3+ channel streams, with sometimes false-positive PS detection
x BMP: was wrongly considering 4-bit without palette as with palette so wrong bit depth
x DPX: some elements in trace were wrongly displayed (wrong endianess)
x B1082, Ancillary data: fix infinite loop