Am 07.11.25 um 12:45 schrieb Gerd Thissen via ffmpeg-user:
Hi Richard,
thanks for your hint.
Indeed the video should be displayed with resolutuion 16:9, but
somehow it is marked as 9:16.
Following command changed the width, but unfortunately the height is
kept:
"ffmpeg -i in.mp4 -c copy -aspect 16:9 out.mp4"
Is there a better way to switch from 9:16 to 16:9?
Thank you,
Gerd
Am 06.11.25 um 17:47 schrieb Richard Bartczak via ffmpeg-user:
Am 06.11.25 um 16:55 schrieb Gerd Thissen via ffmpeg-user:
Hi,
hopefully you can post following 2 questions into your forum:
I am wondering why some of my videos are displayed only inside a
small rectangle of the screen, regardless which device is used.
/ffprobe -v error -show_format -show_streams <input.mp4>/ doesn't
show any significant differences between these and other videos
using the full screen size.
Especially following values are identical:
width=1080
height=1920
sample_aspect_ratio=1:1
display_aspect_ratio=9:16.
Possibly you can propose better parameters for the ffprobe-command?
Or do you have an idea rightaway?
==============================================
In addition, I have another question with respect to video
compatibilty on Samsung tv. Videos in hevc-format (H.265) are not
accepted, so i transcoded them to H.264 using "kdenvlive". This
works fine. But transcoding hevc-videos to H.264 using "ffmpeg" are
refused by Samsung as well. Some specific parameters must be
missing. Comparing results of "ffprobe" between videos produced by
"kdenlive" and by "ffmpeg" don't show significant changes.
Extracts from "ffprobe -v info -show_entries
stream=codec_name,codec_type -of default=noprint_wrappers=1:nokey=1":
a) Input file generated by ffmpeg:
Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(tv, bt709, progressive), 1080x1920, 13290 kb/s, 29.92 fps,
29.92 tbr, 11488 tbn (default)
b) Input file generated by "kdenlive":
Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(tv, bt709, progressive), 1080x1920 [SAR 1:1 DAR 9:16], 15067
kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)
Kind regards,
Gerd
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Hello,
I am wondering about your given resolution, horizontal is the first
value, an example of an 16:9 video :
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661),
yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 9975 kb/s, 25
fps, 25 tbr, 25k tbn, start 0.080000 (default)
Richard
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Here you will find some use full examples :
https://trac.ffmpeg.org/wiki/Scaling
With ffmpeg -i "Video Input.mp4" you will get SAR, DAR.
Richard
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