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• no difference between h264 and h264_cuvid

  10 juillet 2020, par Ruslan Ablyazov

  I use libav to decode an RTSP stream. I tried two code options : with auto codec selection and with hardcoded codec.

  


  pCodec = avcodec_find_decoder (pFormatCtx->streams[p_InputVideoStreamIndex]->codecpar->codec_id);&#xA;//pCodec = avcodec_find_decoder_by_name ("h264_cuvid");&#xA;&#xA;LOG (info) &lt;&lt; "Video codec name" &lt;&lt; pCodec->name &lt;&lt; ". Full name:" &lt;&lt; (pCodec->long_name? PCodec->long_name: "<null>");&#xA;</null>

  


  The avcodec_find_decoder() function returns h264 codec. The problem is that the speed and load on the CPU when using h264 is no different from h264_cuvid. What could be the reason ? When I use h264_cuvid, the video card is loaded by 2-3% more.

  


  Video stream : 1920x1080 25 FPS (main and high profile).
Video card : NVIDIA Corporation GP107 [GeForce GTX 1050 Ti] (rev a1).
Processor : Intel (R) Core (TM) i5-8400 CPU @ 2.80GHz.

  


  Compilation config ffmpeg :

  


  ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --enable -libass --enable-libfreetype --enable-libmp3lame --enable-nonfree --disable-ffplay --enable-libxvid --enable-cuda --enable-cuda-nvcc --enable-cuda-sdk --enable- cuvid --enable-nvenc --enable-nonfree --enable-libnpp --enable-shared --extra-cflags = -I/usr/local/cuda/include --extra-ldflags = -L/usr/local/cuda/lib64


  


• video uploading from app using ffmpeg showing error

  9 juillet 2020, par Dhananjay Acharya

  I am trying to implement video upload from app using ffmpeg. when I m trying to upload video showing this errors. sometime video upload keep on loading. any help.

  


  sometimes app freezes and for some videos showing out of memory error

  


  when i run in a real device logcat details

  


  2020-07-09 12:48:14.240 5226-7065/com.mik I/OMXClient: MuxOMX ctor
2020-07-09 12:48:14.369 5226-5226/com.mik I/Choreographer: Skipped 32 frames!  The application may be doing too much work on its main thread.
2020-07-09 12:48:14.377 5226-5857/com.mik D/AudioManager: getStreamVolume isRestricted mode = 0
2020-07-09 12:48:14.401 5226-7067/com.mik D/AudioManager: getStreamVolume isRestricted mode = 0
2020-07-09 12:48:14.468 5226-7065/com.mik E/ACodec: [OMX.qcom.video.encoder.avc] storeMetaDataInBuffers (output) failed w/ err -1010
2020-07-09 12:48:14.468 5226-7065/com.mik I/ExtendedACodec: setupVideoEncoder()
2020-07-09 12:48:14.469 5226-7065/com.mik W/ACodec: do not know color format 0x7fa30c04 = 2141391876
2020-07-09 12:48:14.471 5226-7065/com.mik W/ACodec: do not know color format 0x7f000789 = 2130708361
2020-07-09 12:48:14.521 5226-7065/com.mik I/ACodec: setupAVCEncoderParameters with [profile: Baseline] [level: Level1]
2020-07-09 12:48:14.543 5226-7065/com.mik I/ACodec: [OMX.qcom.video.encoder.avc] cannot encode HDR static metadata. Ignoring.
2020-07-09 12:48:14.543 5226-7065/com.mik I/ACodec: setupVideoEncoder succeeded
2020-07-09 12:48:14.544 5226-7065/com.mik I/ExtendedACodec: [OMX.qcom.video.encoder.avc] configure, AMessage : AMessage(what = 'conf', target = 13) = {
      int32_t width = 720
      int32_t height = 1280
      int32_t bitrate = 2073600
      string mime = "video/avc"
      int32_t frame-rate = 30
      int32_t i-frame-interval = 1
      int32_t color-format = 2130708361
      int32_t encoder = 1
    }
2020-07-09 12:48:14.549 5226-7065/com.mik W/ACodec: do not know color format 0x7f000789 = 2130708361
2020-07-09 12:48:14.556 5226-6625/com.mik D/FA: Connected to remote service
2020-07-09 12:48:14.557 5226-6625/com.mik V/FA: Processing queued up service tasks: 1
2020-07-09 12:48:14.877 5226-7104/com.mik I/OMXClient: MuxOMX ctor
2020-07-09 12:48:14.946 5226-7103/com.mik I/MediaCodec: [OMX.qcom.video.decoder.avc] setting surface generation to 5351428
2020-07-09 12:48:14.948 5226-7104/com.mik I/ExtendedACodec: setupVideoDecoder()
2020-07-09 12:48:14.948 5226-7104/com.mik I/ExtendedACodec: vpp-enable search is 0 and value is 0
2020-07-09 12:48:14.955 5226-7104/com.mik I/ExtendedACodec: Decoder will be in frame by frame mode
2020-07-09 12:48:14.980 5226-7104/com.mik D/SurfaceUtils: set up nativeWindow 0x7f84499e10 for 352x640, color 0x7fa30c06, rotation 0, usage 0x2002900
2020-07-09 12:48:15.065 5226-7028/com.mik D/resp: 0
2020-07-09 12:48:15.072 5226-7104/com.mik D/SurfaceUtils: set up nativeWindow 0x7f84499e10 for 352x640, color 0x7fa30c06, rotation 0, usage 0x2002900
2020-07-09 12:48:15.152 5226-7065/com.mik D/ACodec: dataspace changed to 0x10c10000 (R:2(Limited), P:3(BT601_6_625), M:3(BT601_6), T:3(SMPTE170M)) (R:2(Limited), S:1(BT709), T:3(SMPTE_170M))

2020-07-09 12:48:15.469 5226-7028/com.mik V/MuxRender: Added track #0 with video/avc to muxer
2020-07-09 12:48:15.469 5226-7028/com.mik V/MuxRender: Added track #1 with audio/mp4a-latm to muxer
2020-07-09 12:48:15.646 5226-7028/com.mik I/MPEG4Writer: limits: 4294967295/0 bytes/us, bit rate: -1 bps and the estimated moov size 3195 bytes
2020-07-09 12:48:15.647 5226-7028/com.mik V/MuxRender: Output format determined, writing 15 samples / 6054 bytes to muxer.
2020-07-09 12:48:15.647 5226-7140/com.mik I/MPEG4Writer: setStartTimestampUs: 0
2020-07-09 12:48:15.647 5226-7140/com.mik I/MPEG4Writer: Earliest track starting time: 0
2020-07-09 12:48:15.650 5226-7139/com.mik I/MPEG4Writer: setStartTimestampUs: 0
2020-07-09 12:48:27.318 5226-7028/com.mik D/MPEG4Writer: Video track stopping
2020-07-09 12:48:27.318 5226-7139/com.mik I/MPEG4Writer: Received total/0-length (401/1) buffers and encoded 401 frames. - Video
2020-07-09 12:48:27.326 5226-7140/com.mik I/MPEG4Writer: Received total/0-length (641/1) buffers and encoded 641 frames. - Audio
2020-07-09 12:48:27.326 5226-7140/com.mik I/MPEG4Writer: Audio track drift time: 0 us
2020-07-09 12:48:27.327 5226-7028/com.mik D/MPEG4Writer: Audio track stopped
2020-07-09 12:48:27.327 5226-7028/com.mik D/MPEG4Writer: Duration from tracks range is [14850005, 14883989] us
2020-07-09 12:48:27.327 5226-7028/com.mik D/MPEG4Writer: Stopping writer thread
2020-07-09 12:48:27.329 5226-7138/com.mik D/MPEG4Writer: 1 chunks are written in the last batch
2020-07-09 12:48:27.329 5226-7028/com.mik D/MPEG4Writer: Writer thread stopped
2020-07-09 12:48:27.332 5226-7028/com.mik I/MPEG4Writer: The mp4 file will not be streamable.
2020-07-09 12:48:27.378 5226-7104/com.mik E/BufferQueueProducer: [SurfaceTexture-1-5226-2] cancelBuffer: BufferQueue has been abandoned
2020-07-09 12:48:27.465 5226-7028/com.mik D/MPEG4Writer: Video track stopping
2020-07-09 12:48:27.494 5226-5226/com.mik I/Timeline: Timeline: Activity_launch_request time:148842468 intent:Intent { cmp=com.mik/.Video_Recording.GallerySelectedVideo.GallerySelectedVideo_A (has extras) }
2020-07-09 12:48:27.541 5226-6625/com.mik V/FA: Recording user engagement, ms: 13774
2020-07-09 12:48:27.561 5226-6625/com.mik V/FA: Connecting to remote service
2020-07-09 12:48:27.578 5226-5857/com.mik D/AudioManager: getStreamVolume isRestricted mode = 0
2020-07-09 12:48:27.584 5226-6625/com.mik V/FA: Activity paused, time: 160261301
2020-07-09 12:48:27.652 5226-6625/com.mik V/FA: Connection attempt already in progress
2020-07-09 12:48:27.727 5226-5226/com.mik I/ExoPlayerImpl: Init d0eca9e [ExoPlayerLib/2.11.1] [oxygen, MI MAX 2, Xiaomi, 25]


  


• How to use ffmpeg to change the h264 properties, yuv, fps, tbr, tbn, and tbc of an mp4 file ?

  23 août 2020, par bguiz

  Using ffmpeg, I would like to convert a video file such that its video stream changes like so :

  


  

  • Current video stream : Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2560x1080 [SAR 4:3 DAR 256:81], 60 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)

  


  • Target video stream : Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 2560x1080, 272 kb/s, 20 fps, 20 tbr, 10240 tbn, 40 tbc (default)

  


  


  (values that differ : h264 properties, yuv, fps, tbr, tbn, and tbc)

  


  ... and its audio stream changes like so :

  


  

  • Current audio stream : Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 191 kb/s (default)

  


  • Target audio stream : Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)

  


  


  (values that differ : aac properties)

  


  How can I do this ?

  


  ---

  


  Detailed version

  


  I would like to be able to concatenate, without re-encoding, main.mp4, followed by outro.mp4, using the following commands :

  


  echo "file 'main.mp4'" > concat.txt
echo "file 'outro.mp4'" >> concat.txt
ffmpeg \
  -f concat \
  -safe 0 \
  -i concat.txt \
  -c copy \
  concat.mp4


  


  What results is a file which plays till the end of main.mp4, and then the video freezes, and I hear the audio of outro.mp4. The same video frame then stays on, with no sound, for an extra 30 minutes (end time shown in VLC).

  


  My assumption is that these files are incompatible with each other in some way that prevents them from being concatenated using -codec copy (without re-encoding).

  


  Here is the ffprobe output for main.mp4 :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'main.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 01:13:00.65, start: 0.000000, bitrate: 348 kb/s
    Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 2560x1080, 272 kb/s, 20 fps, 20 tbr, 10240 tbn, 40 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler


  


  Here is the ffprobe output for outro.mp4 :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'outro.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:00:04.12, start: 0.000000, bitrate: 254 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2560x1080 [SAR 4:3 DAR 256:81], 60 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 191 kb/s (default)
    Metadata:
      handler_name    : Stereo


  


  How can I convert outro.mp4, such that I may concatenate the files without re-encoding ?

  


  Note that I am OK with re-encoding the outro.mp4 on its own,
I simply want to avoid re-encoding during the concatenation step,
and avoid re-encoding main.mp4.

  


  ---

  


  ffmpeg build

  


  $ ffmpeg -version
ffmpeg version 4.3-2~18.04.york0 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version='2~18.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil      56. 51.100 / 56. 51.100
libavcodec     58. 91.100 / 58. 91.100
libavformat    58. 45.100 / 58. 45.100
libavdevice    58. 10.100 / 58. 10.100
libavfilter     7. 85.100 /  7. 85.100
libavresample   4.  0.  0 /  4.  0.  0
libswscale      5.  7.100 /  5.  7.100
libswresample   3.  7.100 /  3.  7.100
libpostproc    55.  7.100 / 55.  7.100