Re: [FFmpeg-user] Documentation for input -i options
On Thu, Dec 05, 2019 at 21:10:20 +0530, Gyan wrote: > See ffmpeg -h demuxer=image2 to see its options, or on the web at Funnily, of all self-documenting options, this one's default behavior (and range) will look somewhat confusing to the user: -pattern_type .D set pattern type (from 0 to INT_MAX) (default 4) glob_sequence 0.D select glob/sequence pattern type glob1.D select glob pattern type sequence2.D select sequence pattern type none3.D disable pattern matching Note "(from 0 to INT_MAX) (default 4)". We may want to suggest a fix for that. :-) Explanation: The default '4' is actually interpreted as "some default behavior, either 'none' or 'glob_sequence', depending on some stuff". Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Documentation for input -i options
On Thu, Dec 05, 2019 at 15:30:16 +, John Dexter wrote: > On Thu, 5 Dec 2019 at 15:23, Gyan wrote: > > What specifically are you trying to do? > > Time-lapse from a whole bunch of images. I've found examples online of > syntax I can use but no explanation exactly how this is working and how > flexible this is. > e.g. -i image%8d This is basically the image2 demuxer. > I'd like to know how I can specify which files are used and in which order. > Maybe my question is where is the input URL functionality documented? It's documented in the image2 demuxer's docs: https://ffmpeg.org/ffmpeg-formats.html#image2-1 Look at the description of "pattern_type" and its restrictions. If you want to specify an arbitrary list (random file names, non-alphabetical order), it's probably easiest to rename the files - or better, using a modern operating system, creating symbolic links - to adhere to "somename%08d.suffix" in numerical order without gaps. Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Documentation for input -i options
On 05-12-2019 09:00 pm, John Dexter wrote: On Thu, 5 Dec 2019 at 15:23, Gyan wrote: On 05-12-2019 08:44 pm, John Dexter wrote: Bizarrely am struggling to find a thorough documentation of -i and relying on examples online. Can anyone point me where in the online documentation this is documented (not a man page) please? I know it supports patterns e.g. for timelapse but I cannot find a reference. All -i does is specify the input URL. Which options are applicable for an input is determined by the input format / codecs discovered by ffmpeg after probing the input. What specifically are you trying to do? Time-lapse from a whole bunch of images. I've found examples online of syntax I can use but no explanation exactly how this is working and how flexible this is. e.g. -i image%8d I'd like to know how I can specify which files are used and in which order. Maybe my question is where is the input URL functionality documented? For a sequence of images, the input URL serves as a pattern which is interpreted by the image sequence demuxer (image2). See ffmpeg -h demuxer=image2 to see its options, or on the web at http://ffmpeg.org/ffmpeg-formats.html#image2-1 On linux, you should also have access to globbing support. Gyan ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Documentation for input -i options
On Thu, 5 Dec 2019 at 15:23, Gyan wrote: > > > On 05-12-2019 08:44 pm, John Dexter wrote: > > Bizarrely am struggling to find a thorough documentation of -i and > relying > > on examples online. Can anyone point me where in the online documentation > > this is documented (not a man page) please? I know it supports > > patterns e.g. for timelapse but I cannot find a reference. > > All -i does is specify the input URL. Which options are applicable for > an input is determined by > the input format / codecs discovered by ffmpeg after probing the input. > > What specifically are you trying to do? > Time-lapse from a whole bunch of images. I've found examples online of syntax I can use but no explanation exactly how this is working and how flexible this is. e.g. -i image%8d I'd like to know how I can specify which files are used and in which order. Maybe my question is where is the input URL functionality documented? John > > Gyan > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Documentation for input -i options
On 05-12-2019 08:44 pm, John Dexter wrote: Bizarrely am struggling to find a thorough documentation of -i and relying on examples online. Can anyone point me where in the online documentation this is documented (not a man page) please? I know it supports patterns e.g. for timelapse but I cannot find a reference. All -i does is specify the input URL. Which options are applicable for an input is determined by the input format / codecs discovered by ffmpeg after probing the input. What specifically are you trying to do? Gyan ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
