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HTML5 audio and video support
13 April 2011, byMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
Encoding and processing into web-friendly formats
13 April 2011, byMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
Supporting all media types
13 April 2011, byUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats: images: png, gif, jpg, bmp and more audio: MP3, Ogg, Wav and more video: AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data: OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
On other websites (9552)
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avfilter/vf_convolve: unbreak non-power of 2 width&height filtering
23 December 2017, by Paul B Mahol -
ffmpeg - force_original_aspect_ratio=increase - stretches video height but not width [closed]
10 February, by RhysI am trying to concat 3 videos. But the middle video, is only stretching in height.


test1.mp4
test2.mkv
test3.gif


Which have been encoded into mp4s with ffmpeg


test1.mp4
Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, progressive), 720x1280 [SAR 1:1 DAR 9:16], 30 fps, 30 tbr, 90k tbn

test2.mp4
Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, progressive), 538x662 [SAR 1:1 DAR 269:331], 30 fps, 30 tbr, 90k tbn

test3.mp4
Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, progressive), 333x592 [SAR 1:1 DAR 9:16], 30 fps, 30 tbr, 90k tbn


When I attempt the concat them.
test3.gifscales up to fit the screen. Buttest2.mkvonly scales up its height to fit the screen. (Its width does not increase to match)

When using, force_original_aspect_ratio=decrease,
test2.mkvhas correct aspect ratio (does not stretch) ... but does not stretch to fit screen (1280x720) ... it just sits in the middle of the screen like a thumbnail. Whereastest3.gifcorrectly scales up to fit the screen.

When using, force_original_aspect_ratio=increase,
test2.mkvhas the incorrect aspect ratio (only the height scales up to fit the screen) ... but the width does not scale up and the video appears squashed in width.

These are the codes I am using for both examples,


force_original_aspect_ratio=increase


ffmpeg -f concat -i mylist.txt -vf scale=force_original_aspect_ratio=increase,setsar=1 merged_video2.mp4


force_original_aspect_ratio=decrease


ffmpeg -f concat -i mylist.txt -vf "scale=720:1280:force_original_aspect_ratio=decrease:eval=frame,pad=720:1280:-1:-1:color=black" merged_video2.mp4


Question


How can I get test2.mkv width to scale up with the height? So the aspect ratio stays fixed.


test2.mkv has a DAR 269:331 and the other 2 videos both have, DAR 9:16 ... could this be causing the problem?


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avcodec/cbs_h266: stricter validation for subpicture's max width and height
23 November 2024, by Nuo Mi
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