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Use FFmpeg concat two video, is output video level mistake ?
27 février, par 哇哈哈video1
{
 "index": 0,
 "codec_name": "hevc",
 "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
 "profile": "Main",
 "codec_type": "video",
 "codec_tag_string": "hev1",
 "codec_tag": "0x31766568",
 "width": 1920,
 "height": 1080,
 "coded_width": 1920,
 "coded_height": 1080,
 "has_b_frames": 2,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv420p",
 "level": 120,
 "color_range": "tv",
 "chroma_location": "left",
 "field_order": "progressive",
 "refs": 1,
 "view_ids_available": "",
 "view_pos_available": "",
 "id": "0x1",
 "r_frame_rate": "30/1",
 "avg_frame_rate": "30/1",
 "time_base": "1/15360",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 200192,
 "duration": "13.033333",
 "bit_rate": "10794613",
 "nb_frames": "391",
 "extradata_size": 2496,
 "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,
 "multilayer": 0
 },
 "tags": {
 "language": "eng",
 "handler_name": "VideoHandler",
 "vendor_id": "[0][0][0][0]",
 "encoder": "Lavc61.33.100 libx265",
 "timecode": "00:00:00;00"
 }
}

video2 
{
 "index": 0,
 "codec_name": "hevc",
 "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
 "profile": "Main",
 "codec_type": "video",
 "codec_tag_string": "hev1",
 "codec_tag": "0x31766568",
 "width": 1920,
 "height": 1080,
 "coded_width": 1920,
 "coded_height": 1080,
 "has_b_frames": 2,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv420p",
 "level": 120,
 "color_range": "tv",
 "chroma_location": "left",
 "field_order": "progressive",
 "refs": 1,
 "view_ids_available": "",
 "view_pos_available": "",
 "id": "0x1",
 "r_frame_rate": "25/1",
 "avg_frame_rate": "25/1",
 "time_base": "1/12800",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 1309696,
 "duration": "102.320000",
 "bit_rate": "1024122",
 "nb_frames": "2558",
 "extradata_size": 2496,
 "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,
 "multilayer": 0
 },
 "tags": {
 "language": "und",
 "handler_name": "VideoHandler",
 "vendor_id": "[0][0][0][0]",
 "encoder": "Lavc61.33.100 libx265"
 }
}

out:
{
 "index": 0,
 "codec_name": "hevc",
 "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
 "profile": "Main",
 "codec_type": "video",
 "codec_tag_string": "hev1",
 "codec_tag": "0x31766568",
 "width": 1920,
 "height": 1080,
 "coded_width": 1920,
 "coded_height": 1080,
 "has_b_frames": 2,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv420p",
 "level": 186,
 "color_range": "tv",
 "chroma_location": "left",
 "field_order": "progressive",
 "refs": 1,
 "view_ids_available": "",
 "view_pos_available": "",
 "id": "0x1",
 "r_frame_rate": "30/1",
 "avg_frame_rate": "147450/5767",
 "time_base": "1/1000000",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 115340000,
 "duration": "115.340000",
 "bit_rate": "1060604",
 "nb_frames": "2949",
 "extradata_size": 2500,
 "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,
 "multilayer": 0
 },
 "tags": {
 "language": "und",
 "handler_name": "VideoHandler",
 "vendor_id": "[0][0][0][0]",
 "encoder": "Lavc61.33.100 libx265"
 }
}


output video level is 6.2 ? i wiki level refer to fps resolusion or bitrate,but not suit this output video.
0。0 ! Could Someone HELP me ?


ffmpeg -i .\HEVC_1080p_30P_yellowtree.mp4 -i .\HEVC_1080p_24fps_happy.mp4 -filter_complex "[0:v][1:v]concat=n=2:v=1:a=0[outv]" -map "[outv]" -c:v libx265 concat_output.mp4


ffmpeg version N-118448-g43be8d0728-20250209 Copyright (c) 2000-2025 the FFmpeg developers
built with gcc 14.2.0 (crosstool-NG 1.26.0.120_4d36f27)
configuration : —prefix=/ffbuild/prefix —pkg-config-flags=—static —pkg-config=pkg-config —cross-prefix=x86_64-w64-mingw32- —arch=x86_64 —target-os=mingw32 —enable-gpl —enable-version3 —disable-debug —enable-shared —disable-static —disable-w32threads —enable-pthreads —enable-iconv —enable-zlib —enable-libfreetype —enable-libfribidi —enable-gmp —enable-libxml2 —enable-lzma —enable-fontconfig —enable-libharfbuzz —enable-libvorbis —enable-opencl —disable-libpulse —enable-libvmaf —disable-libxcb —disable-xlib —enable-amf —enable-libaom —enable-libaribb24 —enable-avisynth —enable-chromaprint —enable-libdav1d —enable-libdavs2 —enable-libdvdread —enable-libdvdnav —disable-libfdk-aac —enable-ffnvcodec —enable-cuda-llvm —enable-frei0r —enable-libgme —enable-libkvazaar —enable-libaribcaption —enable-libass —enable-libbluray —enable-libjxl —enable-libmp3lame —enable-libopus —enable-librist —enable-libssh —enable-libtheora —enable-libvpx —enable-libwebp —enable-libzmq —enable-lv2 —enable-libvpl —enable-openal —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenh264 —enable-libopenjpeg —enable-libopenmpt —enable-librav1e —enable-librubberband —enable-schannel —enable-sdl2 —enable-libsnappy —enable-libsoxr —enable-libsrt —enable-libsvtav1 —enable-libtwolame —enable-libuavs3d —disable-libdrm —enable-vaapi —enable-libvidstab —enable-vulkan —enable-libshaderc —enable-libplacebo —disable-libvvenc —enable-libx264 —enable-libx265 —enable-libxavs2 —enable-libxvid —enable-libzimg —enable-libzvbi —extra-cflags=-DLIBTWOLAME_STATIC —extra-cxxflags= —extra-libs=-lgomp —extra-ldflags=-pthread —extra-ldexeflags= —cc=x86_64-w64-mingw32-gcc —cxx=x86_64-w64-mingw32-g++ —ar=x86_64-w64-mingw32-gcc-ar —ranlib=x86_64-w64-mingw32-gcc-ranlib —nm=x86_64-w64-mingw32-gcc-nm —extra-version=20250209
libavutil 59. 56.100 / 59. 56.100
libavcodec 61. 33.100 / 61. 33.100
libavformat 61. 9.107 / 61. 9.107
libavdevice 61. 4.100 / 61. 4.100
libavfilter 10. 9.100 / 10. 9.100
libswscale 8. 13.100 / 8. 13.100
libswresample 5. 4.100 / 5. 4.100
libpostproc 58. 4.100 / 58. 4.100


-
Timeline Display Issue When Merging Multi-Track MP4 Files with FFmpeg
9 juillet 2024, par EasonWaiiI need to merge two videos into one using ffmpeg. The resulting video should have two video tracks and one audio track, with the audio track taken from the longer video.


When playing the merged video in a player like PotPlayer or VLC, it should default to playing the shorter video track. However, users should be able to switch to the other video track if they want.


The problem I am facing :
Everything is working fine, except when the player defaults to the shorter video track, it shows the timeline of the longer video track.


built with Apple clang version 15.0.0 (clang-1500.3.9.4)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/7.0.1 --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-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox
 libavutil 59. 8.100 / 59. 8.100
 libavcodec 61. 3.100 / 61. 3.100
 libavformat 61. 1.100 / 61. 1.100
 libavdevice 61. 1.100 / 61. 1.100
 libavfilter 10. 1.100 / 10. 1.100
 libswscale 8. 1.100 / 8. 1.100
 libswresample 5. 1.100 / 5. 1.100
 libpostproc 58. 1.100 / 58. 1.100
{
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output21.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.16.100
 Duration: 00:00:12.84, start: 0.000000, bitrate: 2207 kb/s
 Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 720x1280 [SAR 1:1 DAR 9:16], 1052 kb/s, 30 fps, 30 tbr, 15360 tbn
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 Stream #0:1[0x2](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 720x1280, 1293 kb/s, 29.83 fps, 29.83 tbr, 11456 tbn (default)
 Metadata:
 handler_name : ?Mainconcept Video Media Handler
 vendor_id : [0][0][0][0]
 Stream #0:2[0x3](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 "streams": [
 {
 "index": 0,
 "codec_name": "hevc",
 "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
 "profile": "Main",
 "codec_type": "video",
 "codec_tag_string": "hev1",
 "codec_tag": "0x31766568",
 "width": 720,
 "height": 1280,
 "coded_width": 720,
 "coded_height": 1280,
 "closed_captions": 0,
 "film_grain": 0,
 "has_b_frames": 2,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "9:16",
 "pix_fmt": "yuv420p",
 "level": 93,
 "color_range": "tv",
 "chroma_location": "left",
 "field_order": "progressive",
 "refs": 1,
 "id": "0x1",
 "r_frame_rate": "30/1",
 "avg_frame_rate": "30/1",
 "time_base": "1/15360",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 196096,
 "duration": "12.766667",
 "bit_rate": "1052926",
 "nb_frames": "383",
 "extradata_size": 2480,
 "disposition": {
 "default": 0,
 "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": {
 "language": "und",
 "handler_name": "VideoHandler",
 "vendor_id": "[0][0][0][0]"
 }
 },
 {
 "index": 1,
 "codec_name": "h264",
 "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
 "profile": "High",
 "codec_type": "video",
 "codec_tag_string": "avc1",
 "codec_tag": "0x31637661",
 "width": 720,
 "height": 1280,
 "coded_width": 720,
 "coded_height": 1280,
 "closed_captions": 0,
 "film_grain": 0,
 "has_b_frames": 2,
 "pix_fmt": "yuv420p",
 "level": 31,
 "color_range": "tv",
 "color_space": "bt709",
 "color_transfer": "bt709",
 "color_primaries": "bt709",
 "chroma_location": "left",
 "field_order": "progressive",
 "refs": 1,
 "is_avc": "true",
 "nal_length_size": "4",
 "id": "0x2",
 "r_frame_rate": "179/6",
 "avg_frame_rate": "3448256/115597",
 "time_base": "1/11456",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 115597,
 "duration": "10.090520",
 "bit_rate": "1293284",
 "bits_per_raw_sample": "8",
 "nb_frames": "301",
 "extradata_size": 46,
 "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": {
 "language": "eng",
 "handler_name": "\u001fMainconcept Video Media Handler",
 "vendor_id": "[0][0][0][0]"
 }
 },
 {
 "index": 2,
 "codec_name": "aac",
 "codec_long_name": "AAC (Advanced Audio Coding)",
 "profile": "LC",
 "codec_type": "audio",
 "codec_tag_string": "mp4a",
 "codec_tag": "0x6134706d",
 "sample_fmt": "fltp",
 "sample_rate": "44100",
 "channels": 2,
 "channel_layout": "stereo",
 "bits_per_sample": 0,
 "initial_padding": 0,
 "id": "0x3",
 "r_frame_rate": "0/0",
 "avg_frame_rate": "0/0",
 "time_base": "1/44100",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 566244,
 "duration": "12.840000",
 "bit_rate": "130447",
 "nb_frames": "554",
 "extradata_size": 5,
 "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": {
 "language": "und",
 "handler_name": "SoundHandler",
 "vendor_id": "[0][0][0][0]"
 }
 }
 ],
 "format": {
 "filename": "output21.mp4",
 "nb_streams": 3,
 "nb_programs": 0,
 "nb_stream_groups": 0,
 "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
 "format_long_name": "QuickTime / MOV",
 "start_time": "0.000000",
 "duration": "12.840000",
 "size": "3543155",
 "bit_rate": "2207573",
 "probe_score": 100,
 "tags": {
 "major_brand": "isom",
 "minor_version": "512",
 "compatible_brands": "isomiso2avc1mp41",
 "encoder": "Lavf59.16.100"
 }
 }
}



I want the timeline to display correctly according to the shorter video track when it is being played, without truncating the timeline of the longer video track and affecting its playback.


-
While using skvideo.io.FFmpegReader and skvideo.io.FFmpegWriter for video throughput the input video and output video length differ
28 juin 2024, par Kaesebrotus AnonymousI have an h264 encoded mp4 video of about 27.5 minutes length and I am trying to create a copy of the video which excludes the first 5 frames. I am using scikit-video and ffmpeg in python for this purpose. I do not have a GPU, so I am using libx264 codec for the output video.


It generally works and the output video excludes the first 5 frames. Somehow, the output video results in a length of about 22 minutes. When visually checking the videos, the shorter video does seem slightly faster and I can identify the same frames at different timestamps. In windows explorer, when clicking properties and then details, both videos' frame rates show as 20.00 fps.


So, my goal is to have both videos of the same length, except for the loss of the first 5 frames which should result in a duration difference of 0.25 seconds, and use the same (almost same) codec and not lose quality.


Can anyone explain why this apparent loss of frames is happening ?


Thank you for your interest in helping me, please find the details below.


Here is a minimal example of what I have done.


framerate = str(20)
reader = skvideo.io.FFmpegReader(inputvideo.mp4, inputdict={'-r': framerate})
writer = skvideo.io.FFmpegWriter(outputvideo.mp4, outputdict={'-vcodec': 'libx264', '-r': framerate})

for idx,frame in enumerate(reader.nextFrame()):
 if idx < 5:
 continue
 writer.writeFrame(frame)

reader.close()
writer.close()


When I read the output video again using FFmpegReader and check the .probeInfo, I can see that the output video has less frames in total. I have also managed to replicate the same problem for shorter videos (now not excluding the first 5 frames, but only throughputting a video), e.g. 10 seconds input turns to 8 seconds output with less frames. I have also tried playing around with further parameters of the outputdict, e.g. -pix_fmt, -b. I have tried to set -time_base in the output dict to the same value as in the inputdict, but that did not seem to have the desired effect. I am not sure if the name of the parameter is right.


For additional info, I am providing the .probeInfo of the input video, of which I used 10 seconds, and the .probeInfo of the 8 second output video it produced.


**input video** .probeInfo:
input dict

{'video': OrderedDict([('@index', '0'),
 ('@codec_name', 'h264'),
 ('@codec_long_name',
 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10'),
 ('@profile', 'High 4:4:4 Predictive'),
 ('@codec_type', 'video'),
 ('@codec_tag_string', 'avc1'),
 ('@codec_tag', '0x31637661'),
 ('@width', '4096'),
 ('@height', '3000'),
 ('@coded_width', '4096'),
 ('@coded_height', '3000'),
 ('@closed_captions', '0'),
 ('@film_grain', '0'),
 ('@has_b_frames', '0'),
 ('@sample_aspect_ratio', '1:1'),
 ('@display_aspect_ratio', '512:375'),
 ('@pix_fmt', 'yuv420p'),
 ('@level', '60'),
 ('@chroma_location', 'left'),
 ('@field_order', 'progressive'),
 ('@refs', '1'),
 ('@is_avc', 'true'),
 ('@nal_length_size', '4'),
 ('@id', '0x1'),
 ('@r_frame_rate', '20/1'),
 ('@avg_frame_rate', '20/1'),
 ('@time_base', '1/1200000'),
 ('@start_pts', '0'),
 ('@start_time', '0.000000'),
 ('@duration_ts', '1984740000'),
 ('@duration', '1653.950000'),
 ('@bit_rate', '3788971'),
 ('@bits_per_raw_sample', '8'),
 ('@nb_frames', '33079'),
 ('@extradata_size', '43'),
 ('disposition',
 OrderedDict([('@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',
 OrderedDict([('tag',
 [OrderedDict([('@key', 'language'),
 ('@value', 'und')]),
 OrderedDict([('@key', 'handler_name'),
 ('@value', 'VideoHandler')]),
 OrderedDict([('@key', 'vendor_id'),
 ('@value', '[0][0][0][0]')])])]))])}

**output video** .probeInfo:
{'video': OrderedDict([('@index', '0'),
 ('@codec_name', 'h264'),
 ('@codec_long_name',
 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10'),
 ('@profile', 'High'),
 ('@codec_type', 'video'),
 ('@codec_tag_string', 'avc1'),
 ('@codec_tag', '0x31637661'),
 ('@width', '4096'),
 ('@height', '3000'),
 ('@coded_width', '4096'),
 ('@coded_height', '3000'),
 ('@closed_captions', '0'),
 ('@film_grain', '0'),
 ('@has_b_frames', '2'),
 ('@pix_fmt', 'yuv420p'),
 ('@level', '60'),
 ('@chroma_location', 'left'),
 ('@field_order', 'progressive'),
 ('@refs', '1'),
 ('@is_avc', 'true'),
 ('@nal_length_size', '4'),
 ('@id', '0x1'),
 ('@r_frame_rate', '20/1'),
 ('@avg_frame_rate', '20/1'),
 ('@time_base', '1/10240'),
 ('@start_pts', '0'),
 ('@start_time', '0.000000'),
 ('@duration_ts', '82944'),
 ('@duration', '8.100000'),
 ('@bit_rate', '3444755'),
 ('@bits_per_raw_sample', '8'),
 ('@nb_frames', '162'),
 ('@extradata_size', '47'),
 ('disposition',
 OrderedDict([('@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',
 OrderedDict([('tag',
 [OrderedDict([('@key', 'language'),
 ('@value', 'und')]),
 OrderedDict([('@key', 'handler_name'),
 ('@value', 'VideoHandler')]),
 OrderedDict([('@key', 'vendor_id'),
 ('@value', '[0][0][0][0]')]),
 OrderedDict([('@key', 'encoder'),
 ('@value',
 'Lavc61.8.100 libx264')])])]))])}


I used 10 seconds by adding this to the bottom of the loop shown above :


if idx >= 200:
 break


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