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26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
Autres articles (78)
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2 mars 2010, parLa ferme est gérée dans son ensemble par des "super admins".
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Sur d’autres sites (15582)
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ffmpeg - convert MP4 to Panasonic Lumix playable MJPEG [closed]
21 août 2024, par Maro NattsI'm new to ffmpeg and ffprobe, I started using it to convert videos to show on 3DS and DSi for an art project.


Now I want to show my own videos on a Panasonic LUMIX digicam (DMC-FT2)(JPN), but have had trouble getting the device to play the video.


The digi takes videos in AVCHD Lite and Motion JPEG.


I've tried online converting mp4 to the respective formats + changing file name, but the device only recognises that it's there — refuses to/can't play it.


I also tried using this code to convert to MJPEG :

ffmpeg -i input.mp4 -c:v mjpeg -q:v 2 -an output.mjpeg

But no luck ! Changed the filename to match the others, the camera recognised the file is there, but can't play it.


So I used this code to get the information of a MJPEG video taken on the digi :

/opt/ffmpeg/ffprobe file.mp4 -show_streams -select_streams v -print_format json

and got the following, is it possible to convert my own video (mp4) to these settings ? So that it can play on the device ? If so how ?


Thanks !


Metadata:
 major_brand : qt 
 minor_version : 537331972
 compatible_brands: qt pana
 creation_time : 2024-08-21T21:54:59.000000Z
 Duration: 00:00:06.00, start: 0.000000, bitrate: 12287 kb/s
 Stream #0:0[0x1](eng): Video: mjpeg (Baseline) (jpeg / 0x6765706A), yuvj420p(pc, bt470bg/unknown/unknown), 640x480, 11083 kb/s, 30 fps, 30 tbr, 30 tbn (default)
 Metadata:
 creation_time : 2024-08-21T21:54:59.000000Z
 vendor_id : pana
 encoder : Photo - JPEG
 Stream #0:1[0x2](eng): Audio: pcm_s16be (twos / 0x736F7774), 16000 Hz, 1 channels, s16, 256 kb/s (default)
 Metadata:
 creation_time : 2024-08-21T21:54:59.000000Z
 vendor_id : pana
 "streams": [
 {
 "index": 0,
 "codec_name": "mjpeg",
 "codec_long_name": "Motion JPEG",
 "profile": "Baseline",
 "codec_type": "video",
 "codec_tag_string": "jpeg",
 "codec_tag": "0x6765706a",
 "width": 640,
 "height": 480,
 "coded_width": 640,
 "coded_height": 480,
 "closed_captions": 0,
 "film_grain": 0,
 "has_b_frames": 0,
 "pix_fmt": "yuvj420p",
 "level": -99,
 "color_range": "pc",
 "color_space": "bt470bg",
 "chroma_location": "center",
 "refs": 1,
 "id": "0x1",
 "r_frame_rate": "30/1",
 "avg_frame_rate": "30/1",
 "time_base": "1/30",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 180,
 "duration": "6.000000",
 "bit_rate": "11083093",
 "bits_per_raw_sample": "8",
 "nb_frames": "180",
 "disposition": {
 "default": 1,
 "dub": 0,
 "original": 0,
 "comment": 0,
 "lyrics": 0,
 "karaoke": 0,
 "forced": 0,
 "hearing_impaired": 0,
 "visual_impaired": 0,
 "clean_effects": 0,
 "attached_pic": 0,
 "timed_thumbnails": 0,
 "non_diegetic": 0,
 "captions": 0,
 "descriptions": 0,
 "metadata": 0,
 "dependent": 0,
 "still_image": 0
 },
 "tags": {
 "creation_time": "2024-08-21T21:54:59.000000Z",
 "language": "eng",
 "vendor_id": "pana",
 "encoder": "Photo - JPEG"
 }
 }
 ]
}



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Flutter error in Ffmpeg, "Unhandled Exception : ProcessException : No such file or directory" in macOS desktop version
19 avril 2024, par pratik vekariyaI'm trying video trim video using ffmpeg, for macOS desktop application.


I have downloaded ffmpeg from here for macOS.


Here is my code


String mainPath = 'Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug/';
 mainPath = mainPath.substring(0, mainPath.lastIndexOf("/"));
 
 Directory directoryExe3 = Directory("$mainPath");
 var dbPath = path.join(directoryExe3.path,
 "App.framework/Resources/flutter_assets/assets/ffmpeg/ffmpegmacos");
//here in "Products/Debug/" folder desktop app will generate

//directoryExe3 path will be, Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug

//and dbPath will be, Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug/App.framework/Resources/flutter_assets/assets/ffmpeg/ffmpegmacos

//so when app will run it can access it from this path

//executable code, command for ffmpeg

String transpose_str += "crop=" +
 out_w.toInt().toString() +
 ":" +
 out_h.toInt().toString() +
 ":" +
 x!.toInt().toString() +
 ":" +
 y!.toInt().toString() +
 ",";
 transpose_str += "scale=960:192";

Future<processresult> result_ = Process.run(dbPath, [
 "-ss",
 timestamp,
 "-i",
 inputFilePath,
 "-t",
 endTime,
 "-vf",
 transpose_str,
 "-an",
 "./temp.mp4",
 ]); 
</processresult>

Now when I run this in macOS desktop verison, it gives me error at Process.run that in dbPath, Unhandled Exception : ProcessException : No such file or directory.


Any help would be appreciate !


when i run this as desktop version it should get file from assets.


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Is there any possibility to transcode a h264 hls/m3u8 live stream into another HEVC (h265) hls/m3u8 live stream using FFmpeg in real time ?
2 septembre 2024, par Ghenadie PripaThe command I used :


ffmpeg -i https://tezaurtv.md/wp-content/uploads/live/index.m3u8 -c:v libx265 -b:v 1500k -tag:v hvc1 -c:a aac -b:a 128k -f hls -hls_time 10 -hls_list_size 10 -hls_flags delete_segments+append_list+program_date_time -hls_playlist_type event -hls_segment_type mpegts -hls_segment_filename "D:/BRUT/HLS/test/stream_%d.ts" -vsync 2 -rtbufsize 500M -loglevel debug D:/BRUT/HLS/test/stream.m3u8


I tried a lot of commands and parameters but nothing helps. The experiment is on local Windows. Transcode with ffmpeg and play with FFplay.


The problem is the following : After I start
stream.m3u8to play after a few seconds the picture and sound stops. What is wrong in the FFmpeg command ?

ffmpeg version 7.0.2-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
 built with gcc 13.2.0 (Rev5, Built by MSYS2 project)


ffplay version 7.0.2-full_build-www.gyan.dev Copyright (c) 2003-2024 the FFmpeg developers
 built with gcc 13.2.0 (Rev5, Built by MSYS2 project)


An error from FFplay :


[hevc @ 0000023d8c320940] Output frame with POC 239.
[hevc @ 0000023d8c320940] Decoded frame with POC 241.
[hevc @ 0000023d8c320e40] nal_unit_type: 35(AUD), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d8c320e40] nal_unit_type: 0(TRAIL_N), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d8c320e40] Output frame with POC 240.
[hevc @ 0000023d8c320e40] Decoded frame with POC 240.
[hevc @ 0000023d855aae80] nal_unit_type: 35(AUD), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d855aae80] nal_unit_type: 0(TRAIL_N), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d855aae80] Output frame with POC 241.
[hevc @ 0000023d855aae80] Decoded frame with POC 242.
[hevc @ 0000023d8c2cab40] nal_unit_type: 35(AUD), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d8c2cab40] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d8c2cab40] Output frame with POC 242.
[hevc @ 0000023d8c2cab40] Decoded frame with POC 247.
[hevc @ 0000023d8c2da9c0] nal_unit_type: 35(AUD), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d8c2da9c0] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0, temporal_id: 0
[hevc @ 0000023d8c2da9c0] Output frame with POC 243.
[hevc @ 0000023d8c2da9c0] Decoded frame with POC 245.
[hls @ 0000023d85544b80] Opening 'D:\BRUT\HLS\test\stream.m3u8' for reading
[hls @ 0000023d85544b80] Skip ('#EXT-X-VERSION:3')
[hls @ 0000023d85544b80] Skip ('#EXT-X-DISCONTINUITY')
[hls @ 0000023d85544b80] Skip ('#EXT-X-PROGRAM-DATE-TIME:2024-08-30T16:29:28.175+0300')
[AVIOContext @ 0000023d8c327040] Statistics: 207 bytes read, 0 seeks
[hls @ 0000023d85544b80] Opening 'D:\BRUT\HLS\test\stream.m3u8' for reading
[hls @ 0000023d85544b80] Skip ('#EXT-X-VERSION:3')sq= 0B
[hls @ 0000023d85544b80] Skip ('#EXT-X-DISCONTINUITY')
[hls @ 0000023d85544b80] Skip ('#EXT-X-PROGRAM-DATE-TIME:2024-08-30T16:29:28.175+0300')
[AVIOContext @ 0000023d8c326980] Statistics: 207 bytes read, 0 seeks
[hls @ 0000023d85544b80] Opening 'D:\BRUT\HLS\test\stream.m3u8' for reading
[hls @ 0000023d85544b80] Skip ('#EXT-X-VERSION:3')
[hls @ 0000023d85544b80] Skip ('#EXT-X-DISCONTINUITY')
[hls @ 0000023d85544b80] Skip ('#EXT-X-PROGRAM-DATE-TIME:2024-08-30T16:29:28.175+0300')
[AVIOContext @ 0000023d8c326f00] Statistics: 207 bytes read, 0 seeks
 11.30 A-V:-18.499 fd= 3 aq= 0KB vq= 0KB sq= 0B


I tried to transcode in real time hls h264 to hls 265.


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