Re: [FFmpeg-user] How to set 3 specific metadata flags (ITU601/displayoffset) in FFmpegs IMX50 MXF-OP1a encoding?

2015-03-20 Thread tim nicholson
On 19/03/15 15:48, Christoph Gerstbauer wrote: Shame, don't understand the qmax issue. but if you look at:- tests/lavf_regression.sh line 90 you will see an IMX30 example which uses -qmax 12 and my other other parameters. However not sure what difference closed/open gop makes on I frame

Re: [FFmpeg-user] Problems with opening some DPX files

2015-03-20 Thread AB_ffmpeg
On 19-03-15 13:47, Christoph Gerstbauer wrote: Hello, I am testing the transcoding of different DPX files from different sources. I have here 2 files which cannot be opened by ffmpeg. https://dl.dropboxusercontent.com/u/26129407/ProblematicDPX_1.zip When I open the files with ImageMagick

Re: [FFmpeg-user] hls_size

2015-03-20 Thread Bogdan ioan Gabor
Sorry, I meant g = segment_length * framerate On Friday, March 20, 2015 5:21 PM, Bogdan ioan Gabor bogdanioan.ga...@yahoo.com wrote: Hi, I had the same issue, and I managed to fix it by setting the framerate (-r parameter) and the GOP (-g parameter) which I think it depends on the

Re: [FFmpeg-user] hls_size

2015-03-20 Thread Bogdan ioan Gabor
Hi, I had the same issue, and I managed to fix it by setting the framerate (-r parameter) and the GOP (-g parameter) which I think it depends on the framerate.So, for 3 seconds segments, I've used a framerate of 10 and a GOP of 30. I thought it's good/normal to have an I-Frame on every

Re: [FFmpeg-user] hls_size

2015-03-20 Thread Davood Falahati
Thank you, I managed to do that finally. What is your recommendation for segment_length and list_size for a low-latency live broadcasting? Davood Falahati, PhD candidate in Isfahan University of Technology. d.falahati.1...@ieee.org On Fri, Mar 20, 2015 at 8:22 AM, Bogdan ioan Gabor

Re: [FFmpeg-user] Why start_time is sometimes non zero?

2015-03-20 Thread Christian Johannesen
I know files captured with Final Cut Pro 7 have this attribute. The software starts recording the audio and video tracks and then inserts metadata for each track to indicate the offset of the start of the track relative to the start time of the container. This aligns the tracks, to this point.

Re: [FFmpeg-user] How to set 3 specific metadata flags (ITU601/displayoffset) in FFmpegs IMX50 MXF-OP1a encoding?

2015-03-20 Thread Christoph Gerstbauer
Am 20.03.2015 um 16:21 schrieb tim nicholson: On 20/03/15 09:19, tim nicholson wrote: On 19/03/15 15:48, Christoph Gerstbauer wrote: Shame, don't understand the qmax issue. but if you look at:- tests/lavf_regression.sh line 90 you will see an IMX30 example which uses -qmax 12 and my other

Re: [FFmpeg-user] How to set 3 specific metadata flags (ITU601/displayoffset) in FFmpegs IMX50 MXF-OP1a encoding?

2015-03-20 Thread tim nicholson
On 20/03/15 15:21, tim nicholson wrote: On 20/03/15 09:19, tim nicholson wrote: On 19/03/15 15:48, Christoph Gerstbauer wrote: Shame, don't understand the qmax issue. but if you look at:- tests/lavf_regression.sh line 90 you will see an IMX30 example which uses -qmax 12 and my other other