https://bugs.kde.org/show_bug.cgi?id=468103
Bug ID: 468103
Summary: Transcoding to editor-friendly format does not
transcode to editor-friendly format
Classification: Applications
Product: kdenlive
Version: 22.12.3
Platform: Neon
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: User Interface
Assignee: j...@kdenlive.org
Reporter: mashkal2...@gmail.com
Target Milestone: ---
SUMMARY
***
the "The following clips are not usable for editing" warning appears in the
"transcode to editor-friendly format" dialog even when the clip is already in
an edit-friendly format.
***
STEPS TO REPRODUCE
1. Import a clip with the following codec:
$ mediainfo 2023-04-01\ 01-00-05.mkv
General
Unique ID :
112631966528953939127287428105906066476 (0x54BC20B12A683ACA87004B0CDF7A942C)
Complete name : 2023-04-01 01-00-05.mkv
Format : Matroska
Format version : Version 4
File size : 456 MiB
Duration : 13 min 46 s
Overall bit rate : 4 623 kb/s
Writing application : Lavf58.76.100
Writing library : Lavf58.76.100
ErrorDetectionType : Per level 1
Video
ID : 1
Format : AV1
Format/Info : AOMedia Video 1
Format profile : Main@L4.1
Codec ID : V_AV1
Duration : 13 min 46 s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : A_AAC-2
Duration : 13 min 46 s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Title : Track1
Default : Yes
Forced : No
2. Right click the clip, and select "Transcode to edit-friendly format".
Observe that the clip is not in an editor-friendly format: "The following clips
are not usable for editing"
3. Click the button that transcodes to an editor-friendly format. (x264 iframes
only, lossy). This produces the following file:
mediainfo 2023-04-01\ 01-00-05-60fps.mp4
General
Complete name : 2023-04-01 01-00-05-60fps.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 3.36 GiB
Duration : 13 min 46 s
Overall bit rate mode : Variable
Overall bit rate : 34.9 Mb/s
Writing application : Lavf58.76.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High Intra@L4.2
Format settings : CABAC
Format settings, CABAC : Yes
Format settings, GOP : N=1
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 13 min 46 s
Bit rate mode : Variable
Bit rate : 34.6 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.278
Stream size : 3.33 GiB (99%)
Writing library : x264 core 163 r3060 5db6aa6
Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 /
analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 /
me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 /
fast_pskip=1 / chroma_qp_offset=-2 / threads=30 / lookahead_threads=5 /
sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 /
constrained_intra=0 / bframes=0 / weightp=0 / keyint=1 / keyint_min=1 /
scenecut=40 / intra_refresh=0 / rc=crf / mbtree=0 / crf=15.0 / qcomp=0.60 /
qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 13 min 46 s
Source duration : 13 min 46 s
Bit rate mode : Constant
Bit rate : 265 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 26.0 MiB (1%)
Source stream size : 26.0 MiB (1%)
Title : Track1
Default : Yes
Alternate group : 1
mdhd_Duration : 826880
OBSERVED RESULT
The resulting file shows the warning "The following clips are not usable for
editing" when clicking the "transcode to edit-friendly format" button again.
EXPECTED RESULT
The resulting file does not show the "The following clips are not usable for
editing" warning as the file is already in an edit-friendly format.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
Not sure if this is a UI bug, or if the video is genuinely in a non-edit
friendly format. After replacing the file the first time, timeline scrubbing
performance improved drastically. Does the UI assume that the 'transcode to
edit-friendly format' dialog only appears when the clip is in a
non-edit-friendly format and forgets that it can be triggered manually?
transcoding to an edit-friendly format a second time produced this file:
mediainfo 2023-04-01\ 01-00-05-60fps-60fps.mp4
General
Complete name : 2023-04-01 01-00-05-60fps-60fps.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 3.33 GiB
Duration : 13 min 46 s
Overall bit rate mode : Variable
Overall bit rate : 34.6 Mb/s
Writing application : Lavf58.76.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High Intra@L4.2
Format settings : CABAC
Format settings, CABAC : Yes
Format settings, GOP : N=1
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 13 min 46 s
Bit rate mode : Variable
Bit rate : 34.3 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.276
Stream size : 3.30 GiB (99%)
Writing library : x264 core 163 r3060 5db6aa6
Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 /
analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 /
me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 /
fast_pskip=1 / chroma_qp_offset=-2 / threads=30 / lookahead_threads=5 /
sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 /
constrained_intra=0 / bframes=0 / weightp=0 / keyint=1 / keyint_min=1 /
scenecut=40 / intra_refresh=0 / rc=crf / mbtree=0 / crf=15.0 / qcomp=0.60 /
qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 13 min 46 s
Source duration : 13 min 46 s
Bit rate mode : Constant
Bit rate : 265 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 25.8 MiB (1%)
Source stream size : 25.8 MiB (1%)
Default : Yes
Alternate group : 1
mdhd_Duration : 826880
Diff:
diff <(mediainfo 2023-04-01\ 01-00-05-60fps-60fps.mp4) <(mediainfo 2023-04-01\
01-00-05-60fps.mp4)
2c2
< Complete name : 2023-04-01
01-00-05-60fps-60fps.mp4
---
> Complete name : 2023-04-01 01-00-05-60fps.mp4
6c6
< File size : 3.33 GiB
---
> File size : 3.36 GiB
9c9
< Overall bit rate : 34.6 Mb/s
---
> Overall bit rate : 34.9 Mb/s
24c24
< Bit rate : 34.3 Mb/s
---
> Bit rate : 34.6 Mb/s
34,35c34,35
< Bits/(Pixel*Frame) : 0.276
< Stream size : 3.30 GiB (99%)
---
> Bits/(Pixel*Frame) : 0.278
> Stream size : 3.33 GiB (99%)
58,59c58,60
< Stream size : 25.8 MiB (1%)
< Source stream size : 25.8 MiB (1%)
---
> Stream size : 26.0 MiB (1%)
> Source stream size : 26.0 MiB (1%)
> Title : Track1
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