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Médias (91)
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GetID3 - Boutons supplémentaires
9 avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
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Core Media Video
4 avril 2013, par
Mis à jour : Juin 2013
Langue : français
Type : Video
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The pirate bay depuis la Belgique
1er avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
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Exemple de boutons d’action pour une collection collaborative
27 février 2013, par
Mis à jour : Mars 2013
Langue : français
Type : Image
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Exemple de boutons d’action pour une collection personnelle
27 février 2013, par
Mis à jour : Février 2013
Langue : English
Type : Image
Sur d’autres sites (114)
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How to clone last frame when using overlay in ffmpeg ? [closed]
6 mai, par mikezangI use this code to slide previous and next pages up, this is no problems, can I remove png file
1970~1979-last.png
and use the last frame of video file1970~1979.mp4
to instead it ?

script-01.txt


color=white:864x504[c];
[0:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s0];
[1:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s1];
[c][s0]overlay=y=0-h*t[c];
[c][s1]overlay=y='if(between(t,0,18),max(H-h*t,0),max(0-h*(t-18),0-H))'[v],
[v]tpad=stop_mode=clone:stop_duration=10[s2];
[s2]drawtext=fontfile='/WINDOWS/Fonts/Arial.ttf':text='%{eif\:18-t\:d}':
box=1:boxborderw=10:boxcolor=orange@0.4:
x=w-tw-10:y=10:fontsize=24:fontcolor=red:enable='between(t,8,18)';



script-01.bat


ffmpeg -hide_banner -loglevel fatal ^
 -loop 1 -i "C:\myimages\1970~1979-last.png" ^
 -i "C:\myvideos\years\1980~1989.mp4" ^
 -filter_complex_script script-01.txt ^
 -t 18 -y v01.mp4



I got it what I only need video files and capture last frame by pipe line to next step, so that the last frame image never neede ! Though the first slide has little problem when countdown finished !


script-01.bat


ffmpeg -hide_banner -loglevel fatal ^
 -sseof -0.03 -i "C:\myvideos\years\1970~1979.mp4" ^
 -vframes 1 -c:v png -f image2pipe - | ffmpeg ^
 -hide_banner -loglevel fatal -i - ^
 -i "C:\myvideos\years\1980~1989.mp4" ^
 -filter_complex_script script-01.txt ^
 -t 18 -y v01.mp4



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Scale with scale_vaapi and than pad, got error. Seems ok without "pad"
24 mai 2023, par huangda1982My computer : customized Linux, haswell
I am trying to scale 1280x720 video to 640x450 in 640x480 frame with black borders. To do so, I run this command :


ffmpeg -v warning -hide_banner -init_hw_device vaapi=vaapi0:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -hwaccel_device vaapi0 -filter_hw_device vaapi0 -i 'my_video.mp4' -vf 'scale_vaapi=640:450,pad=640:480:0:14' -c:v h264_vaapi -q:v 18 -profile:v main -level 3.1 -c:a aac -q:a 3 -f mp4 out.mp4 -loglevel verbose



And I got this error :


Impossible to convert between the formats supported by the filter 'Parsed_scale_vaapi_0' and the filter 'auto_scaler_0'<br />
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0



When I removed the ",pad=640:480:0:14" part, the command continued. I pressed ctrl-c, and did not check the result.


"-q:v 18", "-level 3.1" and "-q:a" options seem not work.


Full message :


[h264 @ 0x55dfeb529340] Reinit context to 1280x720, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'my_video.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: mp41
 creation_time : 1970-01-01T00:00:00.000000Z
 encoder : PotEncoder
 Duration: 00:22:45.01, start: 0.000000, bitrate: 3264 kb/s
 Stream #0:0(und): Video: h264 (Constrained Baseline), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x720 [SAR 1:1 DAR 16:9], 3068 kb/s, 23.98 fps, 23.98 tbr, 1199 tbn, 47.96 tbc (default)
 Metadata:
 creation_time : 1970-01-01T00:00:00.000000Z
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
 Metadata:
 creation_time : 1970-01-01T00:00:00.000000Z
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
File 'out.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_vaapi))
 Stream #0:1 -> #0:1 (mp3 (mp3float) -> aac (native))
Press [q] to stop, [?] for help
[h264 @ 0x55dfeb553e40] Reinit context to 1280x720, pix_fmt: vaapi_vld
[graph_1_in_0_1 @ 0x55dfeb6b7580] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x3
[graph 0 input from stream 0:0 @ 0x55dfebb4d000] w:1280 h:720 pixfmt:vaapi_vld tb:1/1199 fr:1199/50 sar:1/1
[auto_scaler_0 @ 0x55dfebb4f940] w:iw h:ih flags:'bicubic' interl:0
[Parsed_pad_1 @ 0x55dfebb4c700] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_scale_vaapi_0' and the filter 'Parsed_pad_1'
Impossible to convert between the formats supported by the filter 'Parsed_scale_vaapi_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
[AVIOContext @ 0x55dfeb5522c0] Statistics: 0 seeks, 0 writeouts
[aac @ 0x55dfeb551600] Qavg: 354.000
[aac @ 0x55dfeb551600] 2 frames left in the queue on closing
[AVIOContext @ 0x55dfeb530500] Statistics: 1144787 bytes read, 2 seeks
Conversion failed!



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libavformat split audio file into segments
10 juillet 2021, par Julian F. WeinertI'm trying to implement a feature of ffmpeg within my own project. It consists of chopping up an audio file into small segments using a cut list.


It works pretty well in the command line :


ffmpeg -i input.wav -f segment -ss 1368.26458 -segment_times 1569.83750,1764.75938,1970.09375,2152.77604 -to 2362.36354 -map 0 -c:a copy %03d_output.wav



During my research I came across libavformat/segment.c which looks pretty much exactly like what I need. The problem is that I'm absolutely unable to find an exposed interface or some reference to that in the documentation.


How would I go about doing this using the libav* libraries ?