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Médias (5)

Mot : - Tags -/open film making

ED-ME-5 1-DVD

11 octobre 2011, par kent1

Mis à jour : Octobre 2011

Langue : English

Type : Audio

Tags : opensource, audio, open film making, Elephant dreams, ac3, karaoke

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Revolution of Open-source and film making towards open film making

6 octobre 2011, par kent1

Mis à jour : Juillet 2013

Langue : English

Type : Texte

Tags : creative commons, thèse, opensource, copyleft, open film making, lev manovitch, Elephant dreams, university

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Valkaama DVD Cover Outside

4 octobre 2011, par kent1

Mis à jour : Octobre 2011

Langue : English

Type : Image

Tags : photoshop, psd, creative commons, opensource, open film making, Valkaama

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Valkaama DVD Label

4 octobre 2011, par kent1

Mis à jour : Février 2013

Langue : English

Type : Image

Tags : image, psd, creative commons, doc2img, opensource, open film making, Valkaama

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Valkaama DVD Cover Inside

4 octobre 2011, par kent1

Mis à jour : Octobre 2011

Langue : English

Type : Image

Tags : photoshop, psd, creative commons, opensource, open film making, Valkaama

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Sur d’autres sites (9181)

Convert TS-Stream to MKV with ffmpeg [on hold]

17 septembre 2018, par night4awk

I’m using ffmpeg 3.2.7 and I have a problem converting a ts-file lossless to mkv.
The source file is a dumped IPTV-stream recorded with dumprtp (from dvbstream 0.5).

ffmpeg -i Test.ts -map 0:0 -map 0:2 -vcodec copy -acodec copy -f matroska Test.mkv

The convertion is successful, but the output file is pixelated every few seconds.

When I’m converting it with MKVToolnix everything looks fine.

Does anyone has a solution for that problem ?
Maybe some option to sync the stream correctly ?

Here’s a sample output :

# ffmpeg -i Test.ts -map 0:0 -map 0:2 -vcodec copy -acodec copy -f matroska Test.mkv

ffmpeg version 3.2.7 Copyright (c) 2000-2017 the FFmpeg developers

  built with gcc 6.3.0 (OpenWrt GCC 6.3.0 r212-46f973b)

  configuration: --enable-cross-compile --cross-prefix=i486-openwrt-linux-gnu- --arch=i386 --target-os=linux --prefix=/opt --pkg-config=pkg-config --enable-shared --enable-static --enable-pthreads --enable-zlib --disable-doc --disable-debug --disable-lzma --disable-vaapi --disable-vdpau --disable-outdevs --enable-avresample --enable-libopus --enable-small --enable-gpl --enable-libmp3lame --enable-libx264

  libavutil      55. 34.101 / 55. 34.101

  libavcodec     57. 64.101 / 57. 64.101

  libavformat    57. 56.101 / 57. 56.101

  libavdevice    57.  1.100 / 57.  1.100

  libavfilter     6. 65.100 /  6. 65.100

  libavresample   3.  1.  0 /  3.  1.  0

  libswscale      4.  2.100 /  4.  2.100

  libswresample   2.  3.100 /  2.  3.100

  libpostproc    54.  1.100 / 54.  1.100

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[NULL @ 0x81f9580] SPS unavailable in decode_picture_timing

[NULL @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mp3 @ 0x81fb860] Header missing

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 3 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 3 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 7 times

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing

[h264 @ 0x81f9580] non-existing PPS 0 referenced

[h264 @ 0x81f9580] decode_slice_header error

[h264 @ 0x81f9580] no frame!

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] reference picture missing during reorder

    Last message repeated 1 times

[h264 @ 0x81f9580] Missing reference picture, default is 2147483647

    Last message repeated 1 times

[h264 @ 0x81f9580] mmco: unref short failure

    Last message repeated 1 times

[h264 @ 0x81f9580] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one

[mp3 @ 0x81fb860] Header missing

    Last message repeated 3 times

[h264 @ 0x81f9580] reference picture missing during reorder

    Last message repeated 2 times

[h264 @ 0x81f9580] Missing reference picture, default is 65627

    Last message repeated 2 times

[mp3 @ 0x81fb860] Header missing

    Last message repeated 1 times

[h264 @ 0x81f9580] mmco: unref short failure

    Last message repeated 3 times

[h264 @ 0x81f9580] Increasing reorder buffer to 2

[mp3 @ 0x81fb860] Header missing

    Last message repeated 295 times

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mp3 @ 0x81fb860] Header missing

    Last message repeated 13 times

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mp3 @ 0x81fb860] Header missing

    Last message repeated 2 times

[mpegts @ 0x81f6280] decoding for stream 1 failed

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] PES packet size mismatch

    Last message repeated 1 times

[mpegts @ 0x81f6280] Could not find codec parameters for stream 1 (Audio: mp3, 0 channels, s16p): unspecified frame size

Consider increasing the value for the 'analyzeduration' and 'probesize' options

Input #0, mpegts, from 'Test.ts':

  Duration: 00:01:00.54, start: 48882.340000, bitrate: 3181 kb/s

    Stream #0:0[0x100]: Video: h264, yuv420p(tv, bt470bg, top first), 720x576 [SAR 16:11 DAR 20:11], 25 fps, 50 tbr, 90k tbn, 50 tbc

    Stream #0:1[0x103]: Audio: mp3, 0 channels, s16p

    Stream #0:2[0x102]: Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s

    Stream #0:3[0x101]: Audio: ac3, 48000 Hz, stereo, fltp, 384 kb/s

Output #0, matroska, to 'Test.mkv':

  Metadata:

    encoder         : Lavf57.56.101

    Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, bt470bg, top first), 720x576 [SAR 16:11 DAR 20:11], q=2-31, 25 fps, 50 tbr, 1k tbn, 90k tbc

    Stream #0:1: Audio: mp2 (P[0][0][0] / 0x0050), 48000 Hz, stereo, 192 kb/s

Stream mapping:

  Stream #0:0 -> #0:0 (copy)

  Stream #0:2 -> #0:1 (copy)

Press [q] to stop, [?] for help

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

.

.

.

[mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] changing packet size to 192

    [mpegts @ 0x81f6280] changing packet size to 188

[mpegts @ 0x81f6280] PES packet size mismatch

frame= 2971 fps=2674 q=-1.0 Lsize=   17441kB time=00:00:59.90 bitrate=2385.2kbits/s speed=53.9x    

video:16037kB audio:1410kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Thank you

avcodec_decode_video2 fails to decode after frame resolution change

7 octobre 2016, par Krzysztof Kansy
I’m using ffmpeg in Android project via JNI to decode real-time H264 video stream. On the Java side I’m only sending the the byte arrays into native module. Native code is running a loop and checking data buffers for new data to decode. Each data chunk is processed with :
```
int bytesLeft = data->GetSize();

int paserLength = 0;

int decodeDataLength = 0;

int gotPicture = 0;

const uint8_t* buffer = data->GetData();

while (bytesLeft > 0) {

    AVPacket packet;

    av_init_packet(&amp;packet);

    paserLength = av_parser_parse2(_codecPaser, _codecCtx, &amp;packet.data, &amp;packet.size, buffer, bytesLeft, AV_NOPTS_VALUE, AV_NOPTS_VALUE, AV_NOPTS_VALUE);

    bytesLeft -= paserLength;

    buffer += paserLength;



    if (packet.size > 0) {

        decodeDataLength = avcodec_decode_video2(_codecCtx, _frame, &amp;gotPicture, &amp;packet);

    }

    else {

        break;

    }

    av_free_packet(&amp;packet);

}



if (gotPicture) {

// pass the frame to rendering

}
```
The system works pretty well until incoming video’s resolution changes. I need to handle transition between 4:3 and 16:9 aspect ratios. While having AVCodecContext configured as follows :
```
_codecCtx->flags2|=CODEC_FLAG2_FAST;

_codecCtx->thread_count = 2;

_codecCtx->thread_type = FF_THREAD_FRAME;



if(_codec->capabilities&amp;CODEC_FLAG_LOW_DELAY){

    _codecCtx->flags|=CODEC_FLAG_LOW_DELAY;

}
```
I wasn’t able to continue decoding new frames after video resolution change. The got_picture_ptr flag that avcodec_decode_video2 enables when whole frame is available was never true after that.
This ticket made me wonder if the issue isn’t connected with multithreading. Only useful thing I’ve noticed is that when I change thread_type to FF_THREAD_SLICE the decoder is not always blocked after resolution change, about half of my attempts were successfull. Switching to single-threaded processing is not possible, I need more computing power. Setting up the context to one thread does not solve the problem and makes the decoder not keeping up with processing incoming data.
Everything work well after app restart.

I can only think of one workoround (it doesn’t really solve the problem) : unloading and loading the whole library after stream resolution change (e.g as mentioned in here). I don’t think it’s good tho, it will propably introduce other bugs and take a lot of time (from user’s viewpoint).

Is it possible to fix this issue ?

EDIT :
I’ve dumped the stream data that is passed to decoding pipeline. I’ve changed the resolution few times while stream was being captured. Playing it with ffplay showed that in moment when resolution changed and preview in application froze, ffplay managed to continue, but preview is glitchy for a second or so. You can see full ffplay log here. In this case video preview stopped when I changed resolution to 960x720 for the second time. (Reinit context to 960x720, pix_fmt: yuv420p in log).
Users Flow for Piwik : discover the most popular paths your users take through your website or app

14 décembre 2016, par InnoCraft — Plugins

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