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Trimmed video is not played by TV player
Hi all!
I have 1920×1080 MTS file from Sony Handycam. I converted so that my LG TV would be able to play it:
ffmpeg -i first.MTS -vcodec libx264 -preset fast -vf scale=1280:720 -crf 20 -maxrate 10000k -bufsize 5000k -acodec copy -y first.mp4Then I decided to trim the video. If to capture only 5 leading seconds, then video is not recognized by LG TV (“unsupported format”):
ffmpeg -i first.mp4 -vcodec copy -acodec copy -t 5 -y trim5.mp4However it is recognized if to leave 15 leading seconds:
ffmpeg -i first.mp4 -vcodec copy -acodec copy -t 15 -y trim15.mp4What can be the reason that 5 second video is not recognized by TV player? How to get it recognized?
###############
#MTS -> mp4:
###############ffmpeg version git-2013-01-30-b926cc7 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 30 2013 22:37:52 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
libavutil 52. 17.100 / 52. 17.100
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 34.101 / 3. 34.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mpegts, from 'first.MTS':
Duration: 00:00:40.07, start: 1.000033, bitrate: 10833 kb/s
Program 1
Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1440x1080 [SAR 4:3 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
[libx264 @ 0x2da2020] using SAR=1/1
[libx264 @ 0x2da2020] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64
[libx264 @ 0x2da2020] profile High, level 3.1
[libx264 @ 0x2da2020] 264 - core 129 r2 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - https://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=10000 vbv_bufsize=5000 crf_max=0.0 nal_hrd=none ip_ratio=1.40 aq=1:1.00
[mp4 @ 0x2da4080] track 1: codec frame size is not set
Output #0, mp4, to 'first.mp4':
Metadata:
encoder : Lavf54.61.104
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 12800 tbn, 25 tbc
Stream #0:1: Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, stereo, 256 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 1002 fps=6.4 q=32766.0 Lsize= 27432kB time=00:00:40.10 bitrate=5603.4kbits/s dup=1 drop=0
video:26153kB audio:1252kB subtitle:0 global headers:0kB muxing overhead 0.097143%
[libx264 @ 0x2da2020] frame I:5 Avg QP:19.34 size:104456
[libx264 @ 0x2da2020] frame P:413 Avg QP:21.58 size: 42969
[libx264 @ 0x2da2020] frame B:584 Avg QP:23.95 size: 14574
[libx264 @ 0x2da2020] consecutive B-frames: 0.9% 46.9% 51.8% 0.4%
[libx264 @ 0x2da2020] mb I I16..4: 3.1% 79.3% 17.7%
[libx264 @ 0x2da2020] mb P I16..4: 0.7% 9.1% 1.2% P16..4: 45.4% 28.5% 14.1% 0.0% 0.0% skip: 1.0%
[libx264 @ 0x2da2020] mb B I16..4: 2.0% 5.1% 0.3% B16..8: 35.9% 11.9% 0.4% direct:33.9% skip:10.5% L0:25.9% L1:60.2% BI:14.0%
[libx264 @ 0x2da2020] 8x8 transform intra:76.4% inter:53.2%
[libx264 @ 0x2da2020] coded y,uvDC,uvAC intra: 76.6% 97.3% 73.2% inter: 36.9% 74.3% 10.3%
[libx264 @ 0x2da2020] i16 v,h,dc,p: 16% 12% 31% 40%
[libx264 @ 0x2da2020] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 13% 22% 6% 11% 10% 10% 7% 8%
[libx264 @ 0x2da2020] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 15% 12% 7% 13% 11% 11% 7% 7%
[libx264 @ 0x2da2020] i8c dc,h,v,p: 58% 16% 15% 11%
[libx264 @ 0x2da2020] Weighted P-Frames: Y:0.7% UV:0.0%
[libx264 @ 0x2da2020] ref P L0: 72.9% 27.1%
[libx264 @ 0x2da2020] ref B L0: 75.8% 24.2%
[libx264 @ 0x2da2020] ref B L1: 94.9% 5.1%
[libx264 @ 0x2da2020] kb/s:5345.28
###############
# trim 5 seconds:
###############
ffmpeg version git-2013-01-30-b926cc7 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 30 2013 22:37:52 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
libavutil 52. 17.100 / 52. 17.100
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 34.101 / 3. 34.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'first.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.61.104
Duration: 00:00:40.08, start: 0.000000, bitrate: 5606 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 5345 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 256 kb/s
Metadata:
handler_name : SoundHandler
[mp4 @ 0x24a7540] track 1: codec frame size is not set
Output #0, mp4, to 'trim5.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.61.104
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 5345 kb/s, 25 fps, 12800 tbn, 12800 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, stereo, 256 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 127 fps=0.0 q=-1.0 Lsize= 3551kB time=00:00:05.03 bitrate=5781.7kbits/s
video:3390kB audio:156kB subtitle:0 global headers:0kB muxing overhead 0.125129%
###############
# trim 15 seconds:
###############
ffmpeg version git-2013-01-30-b926cc7 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 30 2013 22:37:52 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
libavutil 52. 17.100 / 52. 17.100
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 34.101 / 3. 34.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'first.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.61.104
Duration: 00:00:40.08, start: 0.000000, bitrate: 5606 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 5345 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 256 kb/s
Metadata:
handler_name : SoundHandler
[mp4 @ 0x22ef540] track 1: codec frame size is not set
Output #0, mp4, to 'trim5.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.61.104
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 5345 kb/s, 25 fps, 12800 tbn, 12800 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, stereo, 256 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 377 fps=0.0 q=-1.0 Lsize= 10219kB time=00:00:15.01 bitrate=5575.6kbits/s
video:9741kB audio:468kB subtitle:0 global headers:0kB muxing overhead 0.105686%
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7 Replies
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That’s curious. My first thought is maybe it’s a key frame issue? Or maybe your LG TV doesn’t support files under a certain time/size, as it might assume them to be corrupt?
First, I would try trimming to 6, 7, 8, 9 seconds etc., up to 15, to see when exactly the trimmed video becomes compatible.
Then, I would try trimming to 5 seconds (or however many seconds as determined by the test above) within your original export command:
ffmpeg -i first.MTS -vcodec libx264 -preset fast -vf scale=1280:720 -crf 20 -maxrate 10000k -bufsize 5000k -acodec copy -t 5 -y firsttrim5.mp4
Let us know how that works. I would be curious to see if this LG TV would play ANY file of 5 seconds in length, if you have any other compatible files you could try trimming and/or re-exporting. -
Thank you for response!
1. Trimmed video becomes compatible at 10s.
9s – still incompatible.
10s – compatible.
11, 12, 13.. – compatible2. Trimming with my original export command:
to 5s – incompatible
to 10s – incompatible
to 20s – compatible3. I tried the same steps for .MOV video from Panasonic Photo Camera:
exported and then trimmed.
Exported video is played, trimmed video isn’t.4. I downloaded .avi movie ( I believe that quite experienced person exported it from DVD source) and trimmed it to 5 seconds.
It is compatible! So, LG TV can play 5sec video.I am newbie in video/audio encoding. Perhaps my initial exports command lacks some keys, may be some metadata should be rebuilt. You said about key frame issue. Is there any way to control it?
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You can’t just trim h264 video at arbitrary points in the stream without re-encoding it. The exception is if you trim it on a keyframe. Or if the video is Intra-frame only in which case every frame is a key-frame.
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I think it is the reason why my 5 seconds trimmed video is of 5.68 sec duration. However it is easily played by mplayer and windows media player, but it is incompatible with LG TV.
I tried to trim it while re-encoding, with the same result. -
You should be able to trim at the end without impacting compatibility, right? I know trimming at the beginning of files (-ss) can be problematic, but I trim the end of files to arbitrary points all the time without any issues, although admittedly I’m not trimming them down to 5-10 seconds or trying to play them on a TV…
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What happens if you trim first, then re-encode?
You could also try forcing some keyframes in your re-encoding, for example
-force_key_frames 0:00:00,0:00:05
would force two key frames: one at the beginning of the file and one at 5 seconds. Or:
-force_key_frames expr:gte(t,n_forced*5)
should do the same. Although admittedly I haven’t played around with forcing keyframes… I was just guessing that maybe the LG TV is seeing too few keyframes in the shortened file. -
If I trim first, then re-encode, nothing changes.
I will try forcing keyframes. Thank you for the example.
In fact LG TV seems to be very capricious to re-encoded video. It didn’t recognize .mp4 created with -slow, slower, veryslow presets for 1280×720 scale. For 1920×1080 situation got even worse.
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