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Les images
15 mai 2013 -
Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
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Automated installation script of MediaSPIP
25 avril 2011, parTo overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
The documentation of the use of this installation script is available here.
The code of this (...)
Sur d’autres sites (5277)
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How to crop a video in the shape of a square, but crop the square itself at different positions in the video via ffmpeg ?
28 juin 2022, par Ilya Pesterev- 

- I have about 100 videos
- All the videos have the same length — 17 seconds.
- In the first part of the video from 0 to 5 seconds I need to crop a square in one position
- In the second part of the video from 5 to 17 seconds I need to crop a square in a different position










I have attached an image for clarity.


How can I automate this process via ffmpeg ?




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FFmpeg splitting large files
1er février 2016, par Yusaf KhaliqI need to split a large video file into multiple pieces quickly and without files with errors. The basic idea is, I have a 2GB video file which I want to change to multiple formats. I have read some encoders can not make use of more than 1 core when encoding to a different format. So I had the idea to split the large file (which is very quick) into 4/8 pieces depending on how many cores I have available on individual servers. re-encode each piece to a new format and use these to display video in sequence.
so
testfile.mp4
becomes
- testfile_piece_1.mp4
- testfile_piece_2.mp4
- testfile_piece_3.mp4
- testfile_piece_4.mp4
these can then be individually be converted.
The solution should not be format specific. However I have found issues with mp4 files.
I have tried the command below, which works really well and fast but creates files with errors.
ffmpeg -i testfile.mp4 -ss 00:00:00 -t 00:20:00 -c copy testfile_piece_1.mp4
When I play the testfile_piece_1.mp4 on VLC it works fine. An issue arises when converting the split file to a different height and width mp4 file. I would get an error similar to "moov atom not found"
I tried adding
-movflags faststart
with no luckI then came across this library https://code.google.com/archive/p/moovrelocator/ which fixed the moov issue but I would then get an error with regards to aac "Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height"
The other way of splitting the files is useless but involved re-encoding the file. not too bad for smaller file size but the 2GB file would probably take days to complete.
Is there a way to split the largr file quickly without producing files with errors ? I have been working on it for days with no luck.
Console output for comment - FFmpeg splitting large files
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/usr/share/nginx/html/uploads/testfile01.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:05:02.08, start: 302.120000, bitrate: 3254 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709) , 1920x1080 [SAR 1:1 DAR 16:9], 3252 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (de fault)
Metadata:
handler_name : VideoHandler
[libx264 @ 0x165ffc0] width not divisible by 2 (853x480)
Output #0, mp4, to '/usr/share/nginx/html/uploads/testfile01_480.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Stream #0:0(und): Video: h264, none, q=2-31, 128 kb/s, SAR 2560:2559 DAR 0:0 , 25 fps (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.41.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or heightconsole output 2
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/usr/share/nginx/html/uploads/testfile.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
creation_time : 2016-01-24 04:26:37
Duration: 01:15:58.08, start: 0.000000, bitrate: 3163 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 3161 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Metadata:
creation_time : 2016-01-24 04:26:37
handler_name : VideoHandler
[segment @ 0x1197060] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
Output #0, segment, to '/usr/share/nginx/html/uploads/testfile%02d.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
encoder : Lavf56.36.100
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 3161 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
Metadata:
creation_time : 2016-01-24 04:26:37
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers -
It takes a long time to add drawtext to large videos in ffmpeg
28 novembre 2022, par AlwaysStudentI wanted to add text to the video uploaded to my server. And I am using the following ffmpeg code. But for large size videos the following code works very slowly and takes a very long time. Is there any way to shorten the time, can you help me with this.


shell_exec("ffmpeg -I video.mp4 -vf \"drawtext=text='Text Here':fontfile=font.ttf:fontcolor='red':fontsize='40':x=w-mod(max(t-1\,0)*(w+tw)/30\,(w+tw)):y=main_h/2\" -acodec copy output.mp4 -preset ultrafast");