Recherche avancée

Sur d’autres sites (9641)

• extract subtitles from mp4 with ffmpeg [closed]

  15 février 2024, par Tom Tapas

  Can some one help me with this ?
Perhaps it's not even possible :
tom@Toms-MBP-50 SrtTest % ffmpeg -i Wraak.mp4
ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
built with Apple clang version 15.0.0 (clang-1500.1.0.2.5)
configuration : —prefix=/opt/homebrew/Cellar/ffmpeg/6.1.1_3 —enable-shared —enable-pthreads —enable-version3 —cc=clang —host-cflags= —host-ldflags='-Wl,-ld_classic' —enable-ffplay —enable-gnutls —enable-gpl —enable-libaom —enable-libaribb24 —enable-libbluray —enable-libdav1d —enable-libharfbuzz —enable-libjxl —enable-libmp3lame —enable-libopus —enable-librav1e —enable-librist —enable-librubberband —enable-libsnappy —enable-libsrt —enable-libssh —enable-libsvtav1 —enable-libtesseract —enable-libtheora —enable-libvidstab —enable-libvmaf —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libxvid —enable-lzma —enable-libfontconfig —enable-libfreetype —enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopenvino —enable-libspeex —enable-libsoxr —enable-libzmq —enable-libzimg —disable-libjack —disable-indev=jack —enable-videotoolbox —enable-audiotoolbox —enable-neon
libavutil 58. 29.100 / 58. 29.100
libavcodec 60. 31.102 / 60. 31.102
libavformat 60. 16.100 / 60. 16.100
libavdevice 60. 3.100 / 60. 3.100
libavfilter 9. 12.100 / 9. 12.100
libswscale 7. 5.100 / 7. 5.100
libswresample 4. 12.100 / 4. 12.100
libpostproc 57. 3.100 / 57. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Wraak.mp4' :
Metadata :
major_brand : mp42
minor_version : 0
compatible_brands : isommp42
creation_time : 2023-06-09T11:22:49.000000Z
Duration : 00:02:46.86, start : 0.000000, bitrate : 3494 kb/s
Stream #0:00x1 : Video : h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], 3366 kb/s, 25 fps, 25 tbr, 25k tbn (default)
Metadata :
creation_time : 2023-06-09T11:22:50.000000Z
handler_name : Mainconcept MP4 Video Media Handler
vendor_id : [0][0][0][0]
encoder : AVC Coding
Stream #0:10x2 : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata :
creation_time : 2023-06-09T11:22:50.000000Z
handler_name : Mainconcept MP4 Sound Media Handler
vendor_id : [0][0][0][0]
At least one output file must be specified

  


  ffmpeg -i Wraak.mp4 -map 0:0 subtitles.srt

  


• doc/community : update the rules according to voting results

  6 novembre 2023, par Anton Khirnov

  doc/community : update the rules according to voting results
  Cf. :
  
  * http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2023-October/316054.html
  
  * http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2023-November/316618.html
  

  • [DH] doc/community.texi

• Error setting option use_wallclock_as_timestamps to value 1 in FFmpegFrameGrabber - avformat_open_input() error -22

  29 mai 2023, par githubwyj

  avformat_open_input() error -22 Error setting option

  


  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("rtsp://xxxxx");
grabber.setOption("use_wallclock_as_timestamps", "1");
grabber.setOption("rtsp_transport", "tcp");
grabber.setOption("rtsp_flags", "prefer_tcp");

grabber.start();


  


  I used ffmpeg in JavaCV to pull rtsp streams, but there was an error like this

  


  Error: [rtsp @ 0x7f2770145a60] Invalid option type.

Error: [rtsp @ 0x7f2770145a60] Error setting option use_wallclock_as_timestamps to value 1.

Error: [rtsp @ 0x7f2770145a60] Invalid option type.

Error: [rtsp @ 0x7f2770145a60] Error setting option use_wallclock_as_timestamps to value 1.

org.bytedeco.javacv.FFmpegFrameGrabber$Exception: avformat_open_input() error -22: Could not open input "rtsp://xxxx@10.10.10.119:554/video/1". (Has setFormat() been called?) (For more details, make sure FFmpegLogCallback.set() has been called.)
        at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:975)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:903)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:898)




  


  When I removed grabber.setOption("use_wallclock_as_timestamps", "1");, the following error occurred：

  


  2023-05-29 11:11:02.169 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] [Eval @ 0x7f2b32790080] Undefined constant or missing '(' in 'prefer_tcp'

2023-05-29 11:11:02.169 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Unable to parse option value "prefer_tcp"

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Error setting option rtsp_flags to value prefer_tcp.

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] [Eval @ 0x7f2b32790080] Undefined constant or missing '(' in 'prefer_tcp'

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Unable to parse option value "prefer_tcp"

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Error setting option rtsp_flags to value prefer_tcp.



org.bytedeco.javacv.FFmpegFrameGrabber$Exception: avformat_open_input() error -22: Could not open input "rtsp://xxxx@10.10.10.119:554/video/1". (Has setFormat() been called?) (For more details, make sure FFmpegLogCallback.set() has been called.)
        at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:975)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:903)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:898)



  


  javacv&ffmpeg :

  


  'org.bytedeco:javacv-platform:1.5.8',
'org.bytedeco:ffmpeg-platform:5.1.2-1.5.8',