On Mon, Sep 12, 2016 at 12:47:40PM -0500, Monique Lassere wrote: > Hi, all, > > Trying to dig as deeply as possible into ffprobe's probe score and how it > is calculated. AVProbeData
> <https://www.ffmpeg.org/doxygen/2.2/structAVProbeData.html> contains a lot This is the doxy for 2.2 not the latest FFmpeg > of specific information about the tags and signatures ffprobe uses to > identify various formats. However, I have noticed some issues that > AVProbeData does not seem to address (in my novice ability to read C): > > 1. Even if ffprobe does not find a codec ID for a given stream, it can > still attempt to identify the stream. What type of information does ffprobe > use to guess the stream? The information provided by the specific demuxer > > 2. Secondly, does the probe score relate to the container format only? From yes unless i misunderstand your question > my look at AVProbeData and the test results I've gotten, that's what it > looks like: an example is a report from a Matroska file with an identified > H.264 encoding (lacking an identifiable tag) achieving a score of 100, and > many others. Therefore, it seems like ffprobe only returns a lower probe > score if data is missing from the container format. > > Thanks for any thoughts or input. > > Best, > > Monique Lassere > > M.S. Candidate in Library & Information Science, UIUC > Graduate Assistant at Research & Information Services > Graduate Hourly at the Rare Book & Manuscript Library > Format Registry Manager at Digital Bedrock > LinkedIn <https://www.linkedin.com/in/moniquelassere> || 847-361-0047 > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB I do not agree with what you have to say, but I'll defend to the death your right to say it. -- Voltaire
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