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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
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Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
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Sur d’autres sites (6518)
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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.


-
merging Multi-Track MP4 Files with ffmpeg show error time porgress bar
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.


-
Media-players show longest duration of multi-track MP4 files from FFmpeg [closed]
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.