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  • Les vidéos

    21 avril 2011, par

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    13 avril 2011

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Sur d’autres sites (5912)

  • cv::cudacodec::VideoReader unable to Play rtsp stream

    22 février 2018, par Pawan

    System information

    • OpenCV => 3.3.0
    • Operating System / Platform => Ubuntu 16.04, x86_64
    • Compiler => gcc version 5.4.1 20160904
    • Cuda => 8.0
    • Nvidia card => GTX 1080 Ti
    • ffmpeg details
      • libavutil 55. 74.100 / 55. 74.100
      • libavcodec 57.103.100 / 57.103.100
      • libavformat 57. 77.100 / 57. 77.100
      • libavdevice 57. 7.101 / 57. 7.101
      • libavfilter 6.100.100 / 6.100.100
      • libswscale 4. 7.103 / 4. 7.103
      • libswresample 2. 8.100 / 2. 8.100

    Detailed description

    i am trying to play a rtsp stream using cudacodec::VideoReader

    Rtsp Stream Details ( from vlc )

    stream_details

    this stream plays fine in vlc and cv::VideoCapture but when i try to play it in cudacodec::VideoReader i get a error saying :

    OpenCV Error: Gpu API call (CUDA_ERROR_FILE_NOT_FOUND [Code = 301]) in CuvidVideoSource, file /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/cuvid_video_source.cpp, line 66

    OpenCV Error: Assertion failed (init_MediaStream_FFMPEG()) in FFmpegVideoSource, file /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/ffmpeg_video_source.cpp, line 101

    Steps to reproduce

    #include <iostream>
    
#include "opencv2/opencv_modules.hpp"
    

    
#if defined(HAVE_OPENCV_CUDACODEC)
    

    
#include <opencv2></opencv2>core.hpp>
    
#include <opencv2></opencv2>cudacodec.hpp>
    
#include <opencv2></opencv2>highgui.hpp>
    

    
int main(int argc, const char* argv[])
    
{
    
    const std::string fname = "rtsp://admin:admin@192.168.1.13/media/video2";
    

    
    cv::namedWindow("GPU", cv::WINDOW_NORMAL);
    

    
    cv::cuda::GpuMat d_frame;
    
    cv::Ptr d_reader = cv::cudacodec::createVideoReader(fname);
    

    
    for (;;)
    
    {
    

    
        if (!d_reader->nextFrame(d_frame))
    
            break;
    

    
        cv::Mat frame;
    
        d_frame.download(frame);
    
        cv::imshow("GPU", frame);
    

    
        if (cv::waitKey(3) > 0)
    
            break;
    
    }
    
    return 0;
    
}
    

    
#else
    
int main()
    
{
    
    std::cout &lt;&lt; "OpenCV was built without CUDA Video decoding support\n" &lt;&lt; std::endl;
    
    return 0;
    
}
    
#endif
    
</iostream>

    I tried debugging it using GDB and saw that in ffmpeg_video_source.cpp bool init_MediaStream_FFMPEG() directly returns without checking the if condition.

    GDB output

    cv::cudacodec::detail::FFmpegVideoSource::FFmpegVideoSource 
    
(this=0x402a20 &lt;_start>, fname=...) at /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/ffmpeg_video_source.cpp:98
    
98      cv::cudacodec::detail::FFmpegVideoSource::FFmpegVideoSource(const String&amp; fname) :
    
(gdb) n
    
99          stream_(0)
    
(gdb) n
    
101         CV_Assert( init_MediaStream_FFMPEG() );
    
(gdb) s
    
(anonymous namespace)::init_MediaStream_FFMPEG () at /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/ffmpeg_video_source.cpp:94
    
94              return initialized;
    
(gdb) display initialized
    
4: initialized = false
    
(gdb) s
    
95          }

    UPDATE :

    I have solved the problem. solution link

  • FFmpeg retrieve a specific program from TS file

    8 mai 2017, par chang jc

    I tried to retrieve a specific program from a TS file.
    Said :

    Input #0, mpegts, from 'DVB_T_good.ts':
    
  Duration: 00:00:48.04, start: 55045.888000, bitrate: 14521 kb/s
    
  Program 300 
    
    Metadata:
    
      service_name    : ?l?��}�TS�
    
      service_provider: ?l?��
    
    Stream #0:0[0xbb9]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:1[0xbba]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:2[0xbbb]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 301 
    
    Metadata:
    
      service_name    : ?l?��N��?S�
    
      service_provider: ?l?��
    
    Stream #0:3[0xbc3]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:9[0xbc4]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:10[0xbc5]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 302 
    
    Metadata:
    
      service_name    : ?l?��e��^S�
    
      service_provider: ?l?��
    
    Stream #0:5[0xbcd]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:6[0xbce]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 304 
    
    Metadata:
    
      service_name    : ?l?��S�pcS�
    
      service_provider: ?l?��
    
    Stream #0:4[0xbe1]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:7[0xbe2]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
    
    Stream #0:8[0xbe3]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp

    Then I tried to retrieve a specific program as :

    ffmpeg -i INPUT -map 0:p:1344 OUTPUT

    It succeeds greatly but the only thing I noticed is :

    it seems to apply transcode (decode & encode again) to the output implicitely ?

    ffmpeg version N-85693-g8de3458 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/home/john/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/john/ffmpeg_build/include --extra-ldflags=-L/home/john/ffmpeg_build/lib --bindir=/home/john/bin --enable-gpl --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --disable-ffplay --disable-ffserver --disable-doc --disable-libopus
    
  libavutil      55. 61.100 / 55. 61.100
    
  libavcodec     57. 93.100 / 57. 93.100
    
  libavformat    57. 72.101 / 57. 72.101
    
  libavdevice    57.  7.100 / 57.  7.100
    
  libavfilter     6. 87.100 /  6. 87.100
    
  libswscale      4.  7.101 /  4.  7.101
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
[NULL @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[NULL @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 2 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpegts @ 0x33af360] PES packet size mismatch
    
    Last message repeated 9 times
    
Input #0, mpegts, from 'DVB_T_good.ts':
    
  Duration: 00:00:48.04, start: 55045.888000, bitrate: 14521 kb/s
    
  Program 300 
    
    Metadata:
    
      service_name    : ?l?��}�TS�
    
      service_provider: ?l?��
    
    Stream #0:0[0xbb9]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:1[0xbba]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:2[0xbbb]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 301 
    
    Metadata:
    
      service_name    : ?l?��N��?S�
    
      service_provider: ?l?��
    
    Stream #0:3[0xbc3]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:9[0xbc4]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:10[0xbc5]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 302 
    
    Metadata:
    
      service_name    : ?l?��e��^S�
    
      service_provider: ?l?��
    
    Stream #0:5[0xbcd]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:6[0xbce]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 304 
    
    Metadata:
    
      service_name    : ?l?��S�pcS�
    
      service_provider: ?l?��
    
    Stream #0:4[0xbe1]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:7[0xbe2]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
    
    Stream #0:8[0xbe3]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
    
map 0:p:304
    
File '304_1800.ts' already exists. Overwrite ? [y/N] y
    
Stream mapping:
    
  Stream #0:4 -> #0:0 (h264 (native) -> mpeg2video (native))
    
  Stream #0:7 -> #0:1 (aac_latm (native) -> mp2 (native))
    
  Stream #0:8 -> #0:2 (aac_latm (native) -> mp2 (native))
    
Press [q] to stop, [?] for help
    
[h264 @ 0x33d6d20] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[h264 @ 0x33d6d20] reference picture missing during reorder
    
[h264 @ 0x33d6d20] Missing reference picture, default is 65784
    
[h264 @ 0x33d6d20] reference picture missing during reorder
    
[h264 @ 0x33d6d20] Missing reference picture, default is 65785
    
Output #0, mpegts, to '304_1800.ts':
    
  Metadata:
    
    encoder         : Lavf57.72.101
    
    Stream #0:0: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
    
    Metadata:
    
      encoder         : Lavc57.93.100 mpeg2video
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2
    
    Stream #0:2: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2
    
[h264 @ 0x33d6d20] mmco: unref short failureime=00:00:44.34 bitrate=3506.2kbits/s speed=1.43x    
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[mpegts @ 0x33af360] PES packet size mismatch
    
[aac_latm @ 0x3587360] Number of bands (59) exceeds limit (45).
    
Error while decoding stream #0:7: Invalid data found when processing input
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[h264 @ 0x33d6d20] mmco: unref short failureime=00:00:45.05 bitrate=3491.2kbits/s speed=1.43x    
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[h264 @ 0x33d6d20] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[mpegts @ 0x33af360] PES packet size mismatchme=00:00:47.74 bitrate=3470.1kbits/s speed=1.43x    
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] error while decoding MB 97 35, bytestream -12
    
Error while decoding stream #0:7: Invalid data found when processing input
    
Error while decoding stream #0:8: Invalid data found when processing input
    
frame= 1404 fps= 42 q=31.0 Lsize=   20396kB time=00:00:47.88 bitrate=3489.5kbits/s speed=1.42x    
    
video:14144kB audio:4429kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.813825%

    You could notice by following message :

    **

    Output #0, mpegts, to '304_1800.ts':
    
  Metadata:
    
    encoder         : Lavf57.72.101
    
    Stream #0:0: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
    
    Metadata:
    
      encoder         : Lavc57.93.100 mpeg2video
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2
    
    Stream #0:2: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2

    **

    If so, could I avoid the transcoding by command ? Or it is a necessary ?
    It it is a need, WHY ?

  • Frame works/Packages for video editing in IOS ?

    16 juillet 2014, par 2vision2

    I’ve just started working on video editing application for IOS.

    What i am trying to do :

    Trying to create a typical Video Editing application with the following features.

    1. Frames split-up(thumbnails)
    2. Adding/merging videos
    3. Adding audio to the video.
    4. Audio/Video Fadeouts.
    5. Zoom in and Zoom out functionalities
    6. Adding subtitles/Titles
    7. Audio Filtering.

    What have i done so far :

    Put a detail pre development study and found that FFMPEG can do the job. I have taken
    the latest version of FFMPEG and built for IOS as .a files.

    However, i feel extremely hard to create a sample programs as i am beginner in ios.

    Also i’ve found that the IOS SDK frameworks like CoreVideo, CoreAnimation, CALayers may help.

    Now reading about OpenGLES.

    What’s my problem :

    1. Any help regarding finding the framework/package (from apple or third party) for the video editing application ?

    2. Is FFMPEG the only option ? If yes, can you guys give me a link or sample programs to start with FFMPEG ?

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