Hi,
I'm watching a serial. Those files are made at 3840 x 1604 pixels, and
display badly on my old and small Lenovo Yoga laptop connected via
HDMI cable to my sitting room TV set (the sound plays well, but the
video is jumpy, it can stop for several seconds). I tested several
conversions to an "easier on the cpu" files, and one of these worked:
ffmpeg -t 10:0 -i movie.mkv \
-vf scale=960:802 -c:v mpeg4 -vtag xvid -qscale:v 3 -c:a
copy -c:s copy -c:s copy \
3b_movie.mkv
You may notice that the scale is wrong. The original aspect ratio is
2.3940, while this has 1.1970, so when VLC plays it it has to change
the displayed aspect ratio at runtime so that it displays correctly.
So I corrected the command line:
ffmpeg -t 10:0 -i movie.mkv \
-vf scale=-1:802 -c:v mpeg4 -vtag xvid -qscale:v 3 -c:a copy
-c:s copy -c:s copy \
3c_movie.mkv
which produces a 1920 x 802 as the same aspect ratio as the original
2.3940. However, it displays badly (haltingly) on the laptop!
Why?
(note: TV set is 1920 x 1080)
The files are local to the computer, the disk is M2. The second
version is bigger:
221287201 3b_movie.mkv
323457154 3c_movie.mkv
The first version plays at about 50% CPU on the two cores, while the
second one plays (haltingly) at 100% and 20%, on vlc.
And both versions play fine on kodi (40% cpu, both cores). Not so the
original, plays haltingly, but different than VLC.
Unrelated problem: only one of the two subtitles streams are copied.
Original video info:
General
Unique ID :
271279799347578328510273573056556095920
(0xCC1696C14DD847778B2137B3485CD9B0)
Complete name : movie.mkv
Format : Matroska
Format version : Version 4
File size : 1.75 GiB
Duration : 54 min 17 s
Overall bit rate : 4 608 kb/s
Frame rate : 23.976 FPS
Encoded date : 2022-05-15 21:04:13 UTC
Writing application : mkvmerge v67.0.0
('Under Stars') 64-bit
Writing library : libebml v1.4.2 +
libmatroska v1.6.4
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video
Coding
Format profile : Main 10@L5@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 54 min 17 s
Bit rate : 3 966 kb/s
Width : 3 840 pixels
Height : 1 604 pixels
Display aspect ratio : 2.39:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.027
Stream size : 1.50 GiB (86%)
Writing library : x265
3.5+12+14-106329cbd:[Windows][GCC 10.3.0][64 bit] 10bit
Encoding settings : cpuid=1111039 /
frame-threads=2 / numa-pools=4 / wpp / no-pmode / no-pme / no-psnr /
ssim / log-level=2 / input-csp=1 / input-res=3840x1604 / interlace=0 /
total-
frames=78104 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=3 /
no-allow-non-conformance / no-repeat-headers / annexb / no-aud /
no-eob / no-eos / no-hrd / info / hash=0 / no-temporal-layers /
open-gop / min
-keyint=23 / keyint=250 / gop-lookahead=0 / bframes=8 / b-adapt=2
/ b-pyramid / bframe-bias=0 / rc-lookahead=80 / lookahead-slices=8 /
scenecut=40 / no-hist-scenecut / radl=0 / no-splice / no-intra-refresh
/ ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 /
tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 /
dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 /
nr-inter=
0 / no-constrained-intra / no-strong-intra-smoothing / max-merge=5
/ limit-refs=3 / no-limit-modes / me=3 / subme=5 / merange=57 /
temporal-mvp / no-frame-dup / no-hme / weightp / no-weightb /
no-analyze-s
rc-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=3 /
selective-sao=4 / early-skip / no-rskip / no-fast-intra /
no-tskip-fast / no-cu-lossless / b-intra / no-splitrd-skip /
rdpenalty=0 / psy-rd=2.00 /
psy-rdoq=0.00 / no-rd-refine / no-lossless / cbqpoffs=0 /
crqpoffs=0 / rc=crf / crf=20.0 / qcomp=0.60 / qpstep=4 / stats-write=0
/ stats-read=0 / ipratio=1.40 / pbratio=1.30 / aq-mode=3 /
aq-strength=1.00
/ cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain
/ qpmax=69 / qpmin=0 / no-const-vbv / sar=0 / overscan=0 /
videoformat=5 / range=0 / colorprim=1 / transfer=1 / colormatrix=1 /
chromaloc=
0 / display-window=0 / cll=0,0 / min-luma=0 / max-luma=1023 /
log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 /
no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps /
scenecut-
bias=0.05 / hist-threshold=0.03 / no-opt-cu-delta-qp /
no-aq-motion / no-hdr10 / no-hdr10-opt / no-dhdr10-opt /
no-idr-recovery-sei / analysis-reuse-level=0 /
analysis-save-reuse-level=0 / analysis-load-re
use-level=0 / scale-factor=0 / refine-intra=0 / refine-inter=0 /
refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 /
no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 / max-ausize-factor
=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt /
no-field / qp-adaptation-range=1.00 / scenecut-aware-qp=0 /
conformance-window-right-offset=0 / conformance-window-bottom-offset=0
/ decoder
-max-rate=0 / no-vbv-live-multi-pass
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : A_EAC3
Duration : 54 min 17 s
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 249 MiB (14%)
Language : English
Service kind : Complete Main
Default : No
Forced : No
Text #1
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 52 min 31 s
Bit rate : 79 b/s
Frame rate : 0.311 FPS
Count of elements : 980
Stream size : 30.6 KiB (0%)
Language : English (US)
Default : No
Forced : No
Text #2
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 52 min 40 s
Bit rate : 84 b/s
Frame rate : 0.329 FPS
Count of elements : 1041
Stream size : 32.7 KiB (0%)
Title : SDH
Language : English (US)
Default : No
Forced : No
First conversion:
General
Unique ID :
65254525213269111854603213254625185810
(0x3117907D45A8EECD2B12881EB9B5D012)
Complete name : 3b_movie.mkv
Format : Matroska
Format version : Version 4
File size : 211 MiB
Duration : 10 min 0 s
Overall bit rate : 2 950 kb/s
Frame rate : 130.170 FPS
Writing application : Lavf57.83.100
Writing library : Lavf57.83.100
ErrorDetectionType : Per level 1
Video
ID : 1
Format : MPEG-4 Visual
Format profile : Simple@L1
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : V_MPEG4/ISO/ASP
Codec ID/Info : Advanced Simple Profile
Duration : 10 min 0 s
Bit rate : 3 966 kb/s
Width : 960 pixels
Height : 802 pixels
Display aspect ratio : 2.39:1
Frame rate mode : Variable
Frame rate : 130.170 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.040
Stream size : 1.50 GiB
Writing library : Lavc57.107.100
Default : Yes
Forced : No
Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : A_EAC3
Duration : 10 min 0 s
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Bit depth : 32 bits
Compression mode : Lossy
Stream size : 249 MiB
Language : English
Service kind : Complete Main
Default : No
Forced : No
Text
Text
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 9 min 59 s
Bit rate : 79 b/s
Frame rate : 1.634 FPS
Count of elements : 980
Stream size : 30.6 KiB (0%)
Language : English
Default : No
Forced : No
Second conversion:
General
Unique ID :
177092085256568951320051960005036432120
(0x853AB1EAED75B4D16EC1208D24195AF8)
Complete name : 3c_movie.mkv
Format : Matroska
Format version : Version 4
File size : 308 MiB
Duration : 10 min 0 s
Overall bit rate : 4 313 kb/s
Frame rate : 130.170 FPS
Writing application : Lavf57.83.100
Writing library : Lavf57.83.100
ErrorDetectionType : Per level 1
Video
ID : 1
Format : MPEG-4 Visual
Format profile : Simple@L1
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : V_MPEG4/ISO/ASP
Codec ID/Info : Advanced Simple Profile
Duration : 10 min 0 s
Bit rate : 3 966 kb/s
Width : 1 920 pixels
Height : 802 pixels
Display aspect ratio : 2.39:1
Frame rate mode : Variable
Frame rate : 130.170 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.020
Stream size : 1.50 GiB
Writing library : Lavc57.107.100
Default : Yes
Forced : No
Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : A_EAC3
Duration : 10 min 0 s
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Bit depth : 32 bits
Compression mode : Lossy
Stream size : 249 MiB (81%)
Language : English
Service kind : Complete Main
Default : No
Forced : No
Text
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 9 min 59 s
Bit rate : 79 b/s
Frame rate : 1.634 FPS
Count of elements : 980
Stream size : 30.6 KiB (0%)
Language : English
Default : No
Forced : No
CPU info of laptop:
Legolas:~ # inxi -C -GSaz --za --vs
inxi 3.3.38-00 (2025-04-06)
System:
Kernel: 6.4.0-150600.23.60-default arch: x86_64 bits: 64
compiler: gcc
v: 7.5.0 clocksource: tsc avail: acpi_pm
parameters: BOOT_IMAGE=/boot/vmlinuz-6.4.0-150600.23.60-default
root=UUID=<filter> resume=/dev/disk/by-label/Swap
splash=verbose showopts
Desktop: Xfce v: 4.20.1 tk: Gtk v: 3.24.43 wm: xfwm4 v: 4.20.0
with: xfce4-panel tools: xfce4-screensaver dm: GDM v: 45.0.1
Distro: openSUSE Leap 15.6
CPU:
Info: model: Intel Celeron N3060 socket: CHV bits: 64 type: MCP
arch: Airmont level: v2 built: 2015-17 process: Intel 14nm
family: 6
model-id: 0x4C (76) stepping: 4 microcode: 0x411
Topology: cpus: 1x dies: 1 clusters: 2 cores: 2 smt:
<unsupported> cache:
L1: 112 KiB desc: d-2x24 KiB; i-2x32 KiB L2: 2 MiB desc:
2x1024 KiB
Speed (MHz): avg: 480 min/max: 480/2480 base/boost: 1600/1660
scaling:
driver: intel_pstate governor: powersave volts: 4.0 V
ext-clock: 83 MHz
cores: 1: 480 2: 480 bogomips: 6400
Flags: ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3
Vulnerabilities: <filter>
Graphics:
Device-1: Intel Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx
Integrated Graphics vendor: Lenovo driver: i915 v: kernel
arch: Gen-8
process: Intel 14nm built: 2014-15 ports: active: HDMI-A-1
off: eDP-1
empty: DP-1,DP-2,HDMI-A-2 bus-ID: 00:02.0 chip-ID: 8086:22b1
class-ID: 0300
Device-2: Bison Lenovo EasyCamera driver: uvcvideo type: USB
rev: 2.0
speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-5:3 chip-ID:
5986:0673
class-ID: 0e02 serial: <filter>
Display: server: X.Org v: 1.21.1.11 with: Xwayland v: 24.1.1
compositor: xfwm4 v: 4.20.0 driver: X: loaded: modesetting
unloaded: fbdev,vesa alternate: intel dri: crocus gpu: i915
display-ID: localhost:10.0 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 509x286mm
(20.04x11.26")
s-diag: 584mm (22.99")
Monitor-1: DVI-D-0 res: mode: 1920x1080 hz: 60 scale: 100% (1)
dpi: 92
size: 531x298mm (20.91x11.73") diag: 609mm (23.97") modes: N/A
API: OpenGL v: 4.5 vendor: mesa v: 23.3.4 glx-v: 1.4 es-v: 3.2
direct-render: yes renderer: llvmpipe (LLVM 17.0.6 128 bits)
device-ID: ffffffff:ffffffff memory: 3.65 GiB unified: yes
API: Vulkan v: 1.3.275 layers: 1 device: 0 type: integrated-gpu
name: Intel
HD Graphics 400 (BSW) driver: mesa intel v: 23.3.4 device-ID:
8086:22b1
surfaces: xcb,xlib
API: EGL Message: EGL data requires eglinfo. Check --recommends.
Info: Tools: api: glxinfo,vulkaninfo de: xfce4-display-settings
x11: xdpyinfo, xprop, xrandr
Legolas:~ #
vlc output of first file:
cer@Legolas:~/Videos> cat 3b
[000055f0bfe99540] main libvlc: Running vlc with the default
interface. Use 'cvlc' to use vlc without interface.
[000055f0bff56310] main audio output error: too low audio sample
frequency (0)
[00007f4d48c3d780] main decoder error: failed to create audio output
[000055f0bff56310] vlcpulse audio output error: digital
pass-through stream connection failure: Not supported
[000055f0bff56310] main audio output error: module not functional
[00007f4d48c3d780] main decoder error: failed to create audio output
[00007f4d800033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
[00007f4d3c00f1f0] vaapi generic error: profile(3) is not supported
[00007f4d800033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
[00007f4d48c186e0] avcodec decoder: Using OpenGL/VAAPI backend for
VDPAU for hardware decoding
[00007f4d48c186e0] avcodec decoder error: existing hardware
acceleration cannot be reused
[00007f4d800033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
[00007f4d3c1203c0] vaapi generic error: profile(3) is not supported
[00007f4d800033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
cer@Legolas:~/Videos>
vlc output of second file:
cer@Legolas:~/Videos> cat 3c
[000055edc8394540] main libvlc: Running vlc with the default
interface. Use 'cvlc' to use vlc without interface.
[000055edc8451310] main audio output error: too low audio sample
frequency (0)
[00007fd330c3f8c0] main decoder error: failed to create audio output
[000055edc8451310] vlcpulse audio output error: digital
pass-through stream connection failure: Not supported
[000055edc8451310] main audio output error: module not functional
[00007fd330c3f8c0] main decoder error: failed to create audio output
[00007fd3780033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
[00007fd33c03b280] vaapi generic error: profile(3) is not supported
[00007fd3780033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
[00007fd330c17fe0] avcodec decoder: Using OpenGL/VAAPI backend for
VDPAU for hardware decoding
[00007fd330c17fe0] avcodec decoder error: existing hardware
acceleration cannot be reused
[00007fd3780033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
[00007fd33c127330] vaapi generic error: profile(3) is not supported
[00007fd3780033b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
cer@Legolas:~/Videos>
