Converting .flv to Mp4

[jbandy1]

What is the best video conversion program for converting .flv files to Mp4s?
I have been creating many .flv files for streaming the past few years and are now needing many of the same videos in MP4 format. I could recompress every single one from Premiere but was interested if anyone knew of a good converter.

The .flv files are at 640x360 60fps at bitrates of 200kbps, 500kbps, 700kbps, 1000kbps and 3000kbps.


Thanks for the help!

[Baldrick]

What is the video codec in the flv? If h264 you could try remux to a mp4 with ffmpeg or mp4box.

[Selur]

if the video is H.264:
a. extract video, audio and timecodes with FLVExtract
b. mux video, audio timecodes with MP4Box
if you need to reencode the video and know you way around video encoding, Hybrid should be able to do the job.

[jbandy1]

The codec for the .flv files is VP6. Does this mean I cannot use the programs you mentioned?

[Selur]

You then, can't simply remux (extract then multiplex) the video since MP4 does not support the VP6 video format.
-> you would need to reencode to in example H.264
Hybrid would still be able to do the job, but since Hybrid is not ment for beginners, but for more advanced users it might be easier for you to use a simpler tool.

[jbandy1]

Well I just tried downloading and installing hybrid on my windows xp machine and couldn't start the program. I received an error which read,
"bluray device testing did not start after 10 sec., cause might be incompatibility with tool or system".

Are there any other programs you can recommend?

[Baldrick]

Batch convert with VidCoder!

[Selur]

"bluray device testing did not start after 10 sec., cause might be incompatibility with tool or system".

please post the exact error message.

Are there any other programs you can recommend?

handbrake, vidcoder

[jbandy1]

Alright, I tried using Vidcoder and it appears to be working. I have tried to convert a 500kbps .flv to a 500kbps mp4. When the conversion completes, I receive an error code that says the conversion failed. I can however open the file and play it all the way through without issue. I posted the job log below. I don't know if the errors it's posting are actual problems that would effect my video. Can either of you offer advice as more experienced users?

Thank you!


## VidCoder 1.4.24.0 (x86)
# Starting job 1/1
# Path: C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv
# Title: 1
# Range: All
# Worker ready: Service state is Opened on pipe VidCoderWorker.0e3f8a69-6a4e-41bc-8d72-5d53461c2d1d
# Connecting to process 1928 on pipe VidCoderWorker.0e3f8a69-6a4e-41bc-8d72-5d53461c2d1d
[08:13:34] hb_init: starting libhb thread
[08:13:34] hb_scan: path=C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv, title_index=1
libbluray/bdnav/index_parse.c:162: indx_parse(): error opening C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv/BDMV/index.bdmv
libbluray/bdnav/index_parse.c:162: indx_parse(): error opening C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv/BDMV/BACKUP/index.bdmv
libbluray/bluray.c:1725: nav_get_title_list(C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv) failed (036FD648)
[08:13:34] bd: not a bd - trying as a stream/file instead
libdvdnav: Using dvdnav version 4.1.3
libdvdread: Encrypted DVD support unavailable.
libdvdnavVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnavVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[08:13:34] dvd: not a dvd - trying as a stream/file instead
Input #0, flv, from 'C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv':
Metadata:
audiodelay : 0
canSeekToEnd : true
Duration: 00:16:23.04, start: 0.000000, bitrate: N/A
Stream #0.0: Video: vp6f, yuv420p, 640x360, 512 kb/s, 59.94 fps, 59.94 tbr, 1k tbn
Stream #0.1: Audio: mp3, 22050 Hz, stereo, s16p, 65 kb/s
[08:13:34] scan: decoding previews for title 1
avformat_seek_file failed
[08:13:34] scan: audio 0x1: mp3, rate=22050Hz, bitrate=65536 Unknown (mp3) (2.0 ch)
[08:13:34] scan: 10 previews, 640x360, 59.940 fps, autocrop = 26/2/2/2, aspect 16:9, PAR 1:1
[08:13:34] libhb: scan thread found 1 valid title(s)
[08:13:34] 2 job(s) to process
[08:13:34] starting job
[08:13:34] work: track 1, compression level not supported by codec
[08:13:34] work: track 1, quality mode not supported by codec
[08:13:34] work: track 1, dithering not supported by codec
[08:13:34] sync: expecting 58923 video frames
[08:13:34] job configuration:
[08:13:34] * source
[08:13:34] + C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv
[08:13:34] + title 1, chapter(s) 1 to 1
[08:13:34] + container: flv
[08:13:34] * destination
[08:13:34] + C:\Documents and Settings\Joe Bandy\Desktop\VidCoder Tests Folder\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.mp4
[08:13:34] + container: MPEG-4 (.mp4 and .m4v)
[08:13:34] * video track
[08:13:34] + decoder: vp6f
[08:13:34] + bitrate 512 kbps
[08:13:34] + frame rate: 59.940 fps -> constant 59.940 fps
[08:13:34] + filters
[08:13:34] + Framerate Shaper (1:27000000:450450)
[08:13:34] + frame rate: 59.940 fps -> constant 59.940 fps
[08:13:34] + Crop and Scale (640:360:0:0:0:0)
[08:13:34] + source: 640 * 360, crop (0/0/0/0): 640 * 360, scale: 640 * 360
[08:13:34] + dimensions: 640 * 360, mod 0
[08:13:34] + encoder: H.264 (x264)
[08:13:34] + x264 preset: veryfast
[08:13:34] + h264 profile: main
[08:13:34] + h264 level: 4.0
[08:13:34] + bitrate: 500 kbps, pass: 1
[08:13:34] * audio track 1
[08:13:34] + decoder: Unknown (mp3) (2.0 ch) (track 2, id 0x1)
[08:13:34] + bitrate: 65 kbps, samplerate: 22050 Hz
[08:13:34] + mixdown: Stereo
[08:13:34] + encoder: AAC (faac)
[08:13:34] + bitrate: 64 kbps, samplerate: 22050 Hz
[08:13:34] reader: first SCR 0 id 0x1 DTS 0
[08:13:34] encx264: min-keyint: 60, keyint: 600
x264 [warning]: --psnr used with psy on: results will be invalid!
x264 [warning]: --tune psnr should be used if attempting to benchmark psnr!
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
x264 [info]: profile Main, level 4.0
[08:13:34] sync: first pts is 4860
[08:17:43] reader: done. 1 scr changes
[08:17:43] work: average encoding speed for job is 236.920685 fps
[08:17:43] sync: got 58924 frames, 58923 expected
[08:17:43] render: 58927 frames output, 0 dropped and 3 duped for CFR/PFR
[08:17:43] render: lost time: 0 (0 frames)
[08:17:43] render: gained time: 0 (0 frames) (0 not accounted for)
[08:17:43] vp6f-decoder done: 58924 frames, 0 decoder errors, 0 drops
x264 [info]: frame I:155 Avg QP:17.24 size: 21879 PSNR Mean Y:47.52 U:52.22 V:50.88 Avg:48.44 Global:47.65
x264 [info]: frame P:33098 Avg QP:19.86 size: 1540 PSNR Mean Y:43.10 U:47.75 V:46.41 Avg:44.04 Global:43.52
x264 [info]: frame B:25674 Avg QP:21.13 size: 271 PSNR Mean Y:43.52 U:48.17 V:46.80 Avg:44.45 Global:43.92
x264 [info]: consecutive B-frames: 41.7% 0.3% 1.0% 57.0%
x264 [info]: mb I I16..4: 29.0% 0.0% 71.0%
x264 [info]: mb P I16..4: 4.0% 0.0% 0.4% P16..4: 19.1% 5.0% 3.2% 0.0% 0.0% skip:68.3%
x264 [info]: mb B I16..4: 0.7% 0.0% 0.0% B16..8: 4.4% 1.3% 0.1% direct: 3.3% skip:90.2% L0:42.3% L1:47.3% BI:10.4%
x264 [info]: final ratefactor: 18.74
x264 [info]: coded y,uvDC,uvAC intra: 18.1% 47.2% 10.1% inter: 4.5% 5.1% 0.3%
x264 [info]: i16 v,h,dc,p: 68% 18% 13% 1%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 45% 23% 19% 2% 2% 2% 2% 2% 2%
x264 [info]: i8c dc,h,v,p: 45% 16% 36% 3%
x264 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x264 [info]: SSIM Mean Y:0.9871132 (18.899db)
x264 [info]: PSNR Mean Y:43.296 U:47.946 V:46.593 Avg:44.229 Global:43.695 kb/s:498.85
[08:17:43] mp3-decoder done: 0 frames, 0 decoder errors, 0 drops
[08:17:43] starting job
[08:17:43] work: track 1, compression level not supported by codec
[08:17:43] work: track 1, quality mode not supported by codec
[08:17:43] work: track 1, dithering not supported by codec
[08:17:43] sync: expecting 58924 video frames
[08:17:43] job configuration:
[08:17:43] * source
[08:17:43] + C:\Documents and Settings\Joe Bandy\Desktop\TESTS for .flv to MP4\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.flv
[08:17:43] + title 1, chapter(s) 1 to 1
[08:17:43] + container: flv
[08:17:43] * destination
[08:17:43] + C:\Documents and Settings\Joe Bandy\Desktop\VidCoder Tests Folder\LEIP #63 Day 1 Stategic Checklists Talk 500kbps.mp4
[08:17:43] + container: MPEG-4 (.mp4 and .m4v)
[08:17:43] * video track
[08:17:43] + decoder: vp6f
[08:17:43] + bitrate 512 kbps
[08:17:43] + frame rate: 59.940 fps -> constant 59.940 fps
[08:17:43] + filters
[08:17:43] + Framerate Shaper (1:27000000:450450)
[08:17:43] + frame rate: 59.940 fps -> constant 59.940 fps
[08:17:43] + Crop and Scale (640:360:0:0:0:0)
[08:17:43] + source: 640 * 360, crop (0/0/0/0): 640 * 360, scale: 640 * 360
[08:17:43] + dimensions: 640 * 360, mod 0
[08:17:43] + encoder: H.264 (x264)
[08:17:43] + x264 preset: veryfast
[08:17:43] + h264 profile: main
[08:17:43] + h264 level: 4.0
[08:17:43] + bitrate: 500 kbps, pass: 2
[08:17:43] * audio track 1
[08:17:43] + decoder: Unknown (mp3) (2.0 ch) (track 2, id 0x1)
[08:17:43] + bitrate: 65 kbps, samplerate: 22050 Hz
[08:17:43] + mixdown: Stereo
[08:17:43] + encoder: AAC (faac)
[08:17:43] + bitrate: 64 kbps, samplerate: 22050 Hz
[08:17:43] reader: first SCR 0 id 0x1 DTS 0
[08:17:43] encx264: min-keyint: 60, keyint: 600
x264 [warning]: --psnr used with psy on: results will be invalid!
x264 [warning]: --tune psnr should be used if attempting to benchmark psnr!
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
x264 [info]: profile Main, level 4.0
[08:18:03] sync: first pts is 4860
[08:21:55] reader: done. 1 scr changes
[08:21:55] work: average encoding speed for job is 254.241608 fps
[08:21:55] sync: got 58924 frames, 58924 expected
[08:21:55] render: 58927 frames output, 0 dropped and 3 duped for CFR/PFR
[08:21:55] render: lost time: 0 (0 frames)
[08:21:55] render: gained time: 0 (0 frames) (0 not accounted for)
[08:21:55] vp6f-decoder done: 58924 frames, 0 decoder errors, 0 drops
x264 [info]: frame I:155 Avg QP:17.38 size: 21503 PSNR Mean Y:47.29 U:51.95 V:50.65 Avg:48.23 Global:47.49
x264 [info]: frame P:33098 Avg QP:19.85 size: 1547 PSNR Mean Y:43.09 U:47.73 V:46.39 Avg:44.03 Global:43.58
x264 [info]: frame B:25674 Avg QP:21.11 size: 269 PSNR Mean Y:43.51 U:48.14 V:46.80 Avg:44.43 Global:43.98
x264 [info]: consecutive B-frames: 41.7% 0.3% 1.0% 57.0%
x264 [info]: mb I I16..4: 29.5% 0.0% 70.5%
x264 [info]: mb P I16..4: 3.9% 0.0% 0.4% P16..4: 19.2% 5.0% 3.2% 0.0% 0.0% skip:68.3%
x264 [info]: mb B I16..4: 0.7% 0.0% 0.0% B16..8: 4.3% 1.2% 0.1% direct: 3.3% skip:90.3% L0:41.9% L1:47.1% BI:11.0%
x264 [info]: coded y,uvDC,uvAC intra: 18.2% 47.3% 10.0% inter: 4.5% 5.1% 0.3%
x264 [info]: i16 v,h,dc,p: 68% 19% 13% 1%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 45% 23% 19% 2% 2% 2% 2% 2% 2%
x264 [info]: i8c dc,h,v,p: 45% 16% 36% 3%
x264 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x264 [info]: SSIM Mean Y:0.9872392 (18.941db)
x264 [info]: PSNR Mean Y:43.280 U:47.922 V:46.580 Avg:44.215 Global:43.754 kb/s:499.91
[08:21:55] mp3-decoder done: 0 frames, 0 decoder errors, 0 drops
[08:21:56] mux: track 0, 58927 frames, 61427413 bytes, 499.87 kbps, fifo 16384
[08:21:56] mux: track 1, 21170 frames, 7859249 bytes, 63.95 kbps, fifo 4096
[08:21:56] libhb: work result = 0
# Encode failed. Error(s) were reported during the encode.
# Job completed